@article{Himwas2021,

title = {Optical properties of lattice-matched GaAsPBi multiple quantum wells grown on GaAs (001)},

author = {C Himwas and S Kijamnajsuk and V Yordsri and C Thanachayanont and T Wongpinij and C Euaruksakul and S Panyakeow and S Kanjanachuchai},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85103170251&doi=10.1088%2f1361-6641%2fabe65d&partnerID=40&md5=e0b7259c7c107b0499808a056f970b14},

doi = {10.1088/1361-6641/abe65d},

issn = {02681242},

year  = {2021},

date = {2021-01-01},

journal = {Semiconductor Science and Technology},

volume = {36},

number = {4},

publisher = {IOP Publishing Ltd},

abstract = {Quaternary alloy GaAsPBi is a novel III-V compound with attractive optical properties and can in principle be grown lattice-matched to GaAs. However, the practical realization of the alloy by metal-organic vapor phase epitaxy and molecular beam epitaxy (MBE) - the two main growth technologies - is fraught with difficulties. Here, using standard solid-source MBE, GaAsPBi films, and GaAsPBi/GaAs multiple quantum wells (MQW) have been grown lattice-matched to (001) GaAs. The structural integrity of the films/MQW is investigated and confirmed by various in- and ex-situ diffraction and spectroscopic techniques. All GaAsPBi structures - films and MQWs - are luminescent at room temperature. Photoluminescence shows that all the samples exhibit an S-shape temperature dependency, indicating strong localizations. Of most significance to practical applications is the observation that the emission from GaAsPBi MQWs is more efficient than their non-quantum well (QW) counterparts (up to 30× at room temperature). These results confirm the long-known benefits of carrier confinements by QWs, demonstrated here for the first time in the GaAsPBi-based system despite the challenge of the crystal growths. © 2021 IOP Publishing Ltd.},

note = {cited By 0},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Kanjanachuchai2021,

title = {In situ observation and control of ultrathin In layers on sublimated InP(100) surfaces},

author = {S Kanjanachuchai and T Wongpinij and C Euaruksakul and P Photongkam},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85097709744&doi=10.1016%2fj.apsusc.2020.148549&partnerID=40&md5=8cceb2237f077545e2946b79265f1e2d},

doi = {10.1016/j.apsusc.2020.148549},

issn = {01694332},

year  = {2021},

date = {2021-01-01},

journal = {Applied Surface Science},

volume = {542},

publisher = {Elsevier B.V.},

abstract = {Vacuum sublimated III–V semiconductor surfaces are often rough and populated by III droplets with little known about the areas in between. Using in situ spectromicroscopy, the sublimation and recrystallization of InP(100) surfaces are followed and controlled in real time, revealing unexpectedly the presence of an ultrathin In layer that coexists with microscopic In droplets. The In layer can be enticed to dewet by controlled exposure to ultraviolet photons which induce quantum electronic stress in the layer. Dewetted atoms redistribute toward existing droplets, forming ultrathin layers around them. Upon heating the layers expand and overlap to form a contiguous layer, returning the surface to the original state prior to dewetting. Effectively, ultrathin In layer can be grown and broken up at will. The wetting-dewetting dynamics around intrinsic (In) and extrinsic (Au) droplets are observed in situ via low-energy electron microscopy while chemical analyses of the surfaces are made using synchrotron-based soft X-rays photoemission electron microscopy. The results demonstrate the often overlooked possibility to grow flat, ultrathin metal films on semiconductors, despite lattice mismatch and the close-packed nature of metallic bond. Ultrathin In layers also offer a unique system to advance experimental studies of two-dimensional superconductivity. © 2020 Elsevier B.V.},

note = {cited By 0},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Zon2021,

title = {Investigation of hybrid InSb and GaSb quantum nanostructures},

author = {Zon and T Korkerdsantisuk and A Sangpho and S Thainoi and U Prasatsap and S Kiravittaya and N Thornyanadacha and A Tandaechanurat and N Nuntawong and S Sopitpan and V Yordsri and C Thanachayanont and S Kanjanachuchai and S Ratanathammaphan and S Panyakeow},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85097898709&doi=10.1016%2fj.mee.2020.111494&partnerID=40&md5=849c53b696aaff87b8aa000f5a7cbdb3},

doi = {10.1016/j.mee.2020.111494},

issn = {01679317},

year  = {2021},

date = {2021-01-01},

journal = {Microelectronic Engineering},

volume = {237},

publisher = {Elsevier B.V.},

abstract = {Hybrid InSb and GaSb nanostructures (NSs) with different repeated cycles; one, two and four, are inserted in double AlGaAs/GaAs heterostructures by molecular beam epitaxy in Stranski-Krastanov mode. Their morphologies and cross-sectional structure are inspected by atomic force microscopy and transmission electron microscopy. Raman spectroscopy reveals the effect of strains produced by the presence of InSb and GaSb NSs. Optical properties of hybrid InSb and GaSb NSs are investigated by power- and temperature-dependent photoluminescence (PL) spectroscopy. Broad and strong PL emission of hybrid NSs are observed from 20 K to room temperature. The Ohmic contacts are performed by gold alloys metallization and gold bonding on the p-n heterojunction devices for electrical current density-voltage characterization of the devices. Photovoltaic effect of hybrid quantum NS-devices with different NS-cycles are tested and recorded under various illumination intensities. Spectral response at long wavelength in infrared region beyond 1 μm originated from the presence of hybrid NSs is detected. © 2020 Elsevier B.V.},

note = {cited By 0},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Chikumpa2020,

title = {Raman peak shifts by applied magnetic field in InSb/AlxIn1−xSb superlattices},

author = {M Chikumpa and Zon and S Thainoi and S Kiravittaya and A Tandaechanurat and N Nuntawong and S Sopitpan and V Yordsri and C Thanachayanont and S Kanjanachuchai and S Ratanathammaphan and S Panyakeow},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85095443053&doi=10.1088%2f2053-1591%2fabbded&partnerID=40&md5=af17ec520fd0c3b6962dd0d41f7d31e5},

doi = {10.1088/2053-1591/abbded},

issn = {20531591},

year  = {2020},

date = {2020-01-01},

journal = {Materials Research Express},

volume = {7},

number = {10},

publisher = {IOP Publishing Ltd},

abstract = {InSb/Alxln1−xSb superlattices (SLs) are grown by molecular beam epitaxy on (001) InSb substrate and Raman scattering spectroscopy of the samples under magnetic field is investigated. Al contents in AlInSb of the samples are varied. All samples are characterized by atomic force microscopy (AFM), X-ray diffraction and Raman scattering spectroscopy. The Raman spectroscopy is done by using excitation laser with 633 nm wavelength and 2 μm beam spot under applied magnetic field from 0 to 170 mT. Both TO and LO Raman peaks from InSb are detected from all samples. There are Raman peak shift of both TO and LO by applied magnetic field. Stronger magnetic effect is found in LO than TO phonon modes. We attribute this effect to the symmetry breaking of the InSb/AlInSb interfaces since the observed roughness of the top InSb layer can qualitatively correlate with the shift. © 2020 The Author(s). Published by IOP Publishing Ltd},

note = {cited By 0},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Himwas2020,

title = {GaAsPBi epitaxial layer grown by molecular beam epitaxy},

author = {C Himwas and A Soison and S Kijamnajsuk and T Wongpinij and C Euaraksakul and S Panyakeow and S Kanjanachuchai},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85089183994&doi=10.1088%2f1361-6641%2fab9b38&partnerID=40&md5=136c8c02c8d19b3cb80b7f975b38484a},

doi = {10.1088/1361-6641/ab9b38},

issn = {02681242},

year  = {2020},

date = {2020-01-01},

journal = {Semiconductor Science and Technology},

volume = {35},

number = {9},

publisher = {Institute of Physics Publishing},

abstract = {GaAsPBi is a new class of quaternary III-V compounds that extends the concept of band gap engineering on GaAs with potentials for lattice matching and excellent temperature stability. The alloy has so far been grown only by metalorganic vapor phase epitaxy and this work represents the first epitaxial results of the alloy grown by molecular beam epitaxy (MBE), an alternative technique and better suited for low-temperature processes involving Bismuth. Crystalline quality of the alloys is probed by high-resolution x-ray diffraction and photoluminescence (PL) which show that smooth and optically active films can be grown in limited parameter windows. Temperature-dependent PL shows that the 200 nm, MBE-grown GaAs0.38P0.44Bi0.18 film (the composition estimated using x-ray photoelectron spectroscopy) has a band gap temperature stability close to that of GaAsBi, and superior to GaAs. The role of Bi in the quaternary alloy is complicated: Bi not only gets incorporated into the growing film but also enhances the P molar fraction. Based on this insight, strategies for growing GaAsPBi epilayers which are lattice-matched to GaAs are described, potentially affecting many important III-V based heterostructures such as lasers, light-emitting diodes, and solar cells. © 2020 IOP Publishing Ltd.},

note = {cited By 1},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Rongrueangkul2020,

title = {Investigation of the Morphology of InSb/InAs Quantum Nanostripe Grown by Molecular Beam Epitaxy},

author = {K Rongrueangkul and P Srisinsuphya and S Thainoi and S Kiravittaya and N Nuntawong and N Thornyanadacha and S Sopitpan and V Yordsri and C Thanachayanont and S Kanjanachuchai and S Ratanathammaphan and A Tandaechanurat and S Panyakeow},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85073939493&doi=10.1002%2fpssb.201900374&partnerID=40&md5=34ed81ba697a222211525ff20e5a1904},

doi = {10.1002/pssb.201900374},

issn = {03701972},

year  = {2020},

date = {2020-01-01},

journal = {Physica Status Solidi (B) Basic Research},

volume = {257},

number = {2},

publisher = {Wiley-VCH Verlag},

abstract = {The dimensions and morphologies of quantum nanostructures are keys to controlling an operating wavelength to a desirable wavelength range due to the quantum effect. The dimension and morphology evolutions of InSb/InAs quantum nanostructures grown by molecular beam epitaxy with respect to the number of InSb monolayers (MLs) are investigated. The formation of the quantum nanostructures is dominated by lateral growth, in which the morphology is further elongated as the number of MLs is increased. Such an anisotropic growth is explained by the difference in the surface energy along each direction, which corresponds to different atomic arrangements in the crystalline structure of InSb. Cross-sectional transmission electron microscopic images show a reduction in the lateral dimension and an increase in the height of the embedded InSb quantum nanostructures when they are embedded in the InAs matrix. The results herein provide a means for obtaining the precise control over dimensions and morphologies of the InSb/InAs nanostructures, which is essential for extending the operating wavelength further into the mid-infrared region. © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim},

note = {cited By 0},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Zon2019a,

title = {Photoluminescence properties as a function of growth mechanism for GaSb/GaAs quantum dots grown on Ge substrates},

author = {Zon and S Thainoi and S Kiravittaya and A Tandaechanurat and S Kanjanachuchai and S Ratanathammaphan and S Panyakeow and Y Ota and S Iwamoto and Y Arakawa},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85071276629&doi=10.1063%2f1.5097261&partnerID=40&md5=bef9e28bd89a90e4e5985d4c8d55b84e},

doi = {10.1063/1.5097261},

issn = {00218979},

year  = {2019},

date = {2019-01-01},

journal = {Journal of Applied Physics},

volume = {126},

number = {8},

publisher = {American Institute of Physics Inc.},

abstract = {In this work, we use photoluminescence (PL) spectroscopy to investigate how self-assembled GaSb/GaAs quantum dots (QDs) depend on their growth mechanism. Carrier transfer (i.e., carrier recombination in QDs and escape through the barrier layer) is investigated as a function of excitation-power- and temperature-dependent PL measurements. A drastic blueshift of the QD peak energy from 1.23 to 1.30 eV and a further shift to 1.33 eV reveal the influence of the GaSb growth rate and the growth temperature on the optical properties of these QDs. The thermal activation energy is extracted from the temperature-dependent PL by fitting the integrated PL intensity of the QD peaks to the Arrhenius relation. The QDs grown at the growth rate of 0.1 monolayers/s at 450 °C have higher thermal activation energy (109 meV) than those grown at a lower growth rate and higher QD growth temperature. The observed PL characteristics are discussed in terms of QD size, uniformity of QDs, and material intermixing occurring during QD growth on the buffer layer and capping layer. © 2019 Author(s).},

note = {cited By 1},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Srisinsuphya2019,

title = {InSb/InAs quantum nano-stripes grown by molecular beam epitaxy and its photoluminescence at mid-infrared wavelength},

author = {P Srisinsuphya and K Rongrueangkul and R Khanchaitham and S Thainoi and S Kiravittaya and N Nuntawong and S Sopitpan and V Yordsri and C Thanachayanont and S Kanjanachuchai and S Ratanathammaphan and A Tandaechanurat and S Panyakeow},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85062228511&doi=10.1016%2fj.jcrysgro.2019.02.062&partnerID=40&md5=340a9226777c2d049a0a162df69bbf60},

doi = {10.1016/j.jcrysgro.2019.02.062},

issn = {00220248},

year  = {2019},

date = {2019-01-01},

journal = {Journal of Crystal Growth},

volume = {514},

pages = {36-39},

publisher = {Elsevier B.V.},

abstract = {Distinct InSb/InAs quantum nano-stripes possessing type-II band alignment with a broken gap are grown using molecular beam epitaxy with low substrate temperature and slow growth rate, aiming for light emission in a mid-infrared range. The quantum nano-stripes are shown to emit light at a wavelength of 3.1 µm. The excitation power dependence of photoluminescence spectra from the quantum nano-stripes reveals a clear linear blueshift with the third root of the excitation power, which is a unique property of the quantum nanostructures with type-II band alignment. The demonstrated mid-infrared light emission from the InSb/InAs quantum nano-stripes would offer a promising pathway for realizing practical, highly-efficient, and room-temperature-operating mid-infrared light sources and detectors. © 2019 Elsevier B.V.},

note = {cited By 2},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Zon2019b,

title = {Anti-phase domain induced morphological differences of self-assembled InSb/GaAs quantum dots grown on (0 0 1) Ge substrate},

author = {Zon and S Thainoi and S Kiravittaya and A Tandaechanurat and N Nuntawong and S Sopitpan and V Yordsri and C Thanachayanont and S Kanjanachuchai and S Ratanathammaphan and S Panyakeow},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85061527393&doi=10.1016%2fj.jcrysgro.2019.02.015&partnerID=40&md5=58e0e65fbdee217951526b20093085ff},

doi = {10.1016/j.jcrysgro.2019.02.015},

issn = {00220248},

year  = {2019},

date = {2019-01-01},

journal = {Journal of Crystal Growth},

volume = {512},

pages = {136-141},

publisher = {Elsevier B.V.},

abstract = {The effects of growth temperature, growth rate and local growth position on the morphology of self-assembled InSb/GaAs quantum dots (QDs) on (0 0 1) Ge substrate are investigated. It is found that for low growth rates, anti-phase domain (APD) boundaries formed during the growth of GaAs on Ge can effectively act as the preferential nucleation position of InSb QDs. For high growth rates, InSb/GaAs QDs nucleate on both the APD boundary and the APD surface, leading to high density-InSb QDs. The QD morphologies on the APD boundary and the APD surface are distinctly different. The roles of growth rate and local growth position on the morphology of realized QDs are described. By varying the growth conditions, low density and locally aligned QDs as well as high density InSb QDs can be obtained. © 2019},

note = {cited By 0},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Lekwongderm2019,

title = {Study on Raman spectroscopy of InSb nano-stripes grown on GaSb substrate by molecular beam epitaxy and their Raman peak shift with magnetic field},

author = {P Lekwongderm and R Chumkaew and S Thainoi and S Kiravittaya and A Tandaechanurat and N Nuntawong and S Sopitpan and V Yordsri and C Thanachayanont and S Kanjanachuchai and S Ratanathammaphan and S Panyakeow},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85061693748&doi=10.1016%2fj.jcrysgro.2019.02.033&partnerID=40&md5=c9f2956e9c12372286a99fceaa0503bf},

doi = {10.1016/j.jcrysgro.2019.02.033},

issn = {00220248},

year  = {2019},

date = {2019-01-01},

journal = {Journal of Crystal Growth},

volume = {512},

pages = {198-202},

publisher = {Elsevier B.V.},

abstract = {We report on the Raman spectroscopy of self-assembled InSb nano-stripes grown on (0 0 1) GaSb substrate by molecular beam epitaxy. The nano-stripes have a truncated pyramidal shape with the typical dimension of ∼150 × 200 × 25 nm 3 . Raman spectroscopy is applied to probe the phonon-related properties of the InSb nano-stripes. Raman spectroscopy shows slight redshifts of the InSb-related phonon peaks when the excitation wavelength is increased. When a magnetic field is applied, blueshifts of these peaks are observed. Transmission electron microscopy is utilized to relate the structural information of the InSb nano-stripes and their Raman properties. © 2019},

note = {cited By 1},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Chevuntulak2019,

title = {Molecular beam epitaxial growth of interdigitated quantum dots for heterojunction solar cells},

author = {C Chevuntulak and T Rakpaises and N Sridumrongsak and S Thainoi and S Kiravittaya and N Nuntawong and S Sopitpan and V Yordsri and C Thanachayanont and S Kanjanachuchai and S Ratanathammaphan and A Tandaechanurat and S Panyakeow},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85061674884&doi=10.1016%2fj.jcrysgro.2019.02.031&partnerID=40&md5=dfa591a95890f7fb57db81c384058dba},

doi = {10.1016/j.jcrysgro.2019.02.031},

issn = {00220248},

year  = {2019},

date = {2019-01-01},

journal = {Journal of Crystal Growth},

volume = {512},

pages = {159-163},

publisher = {Elsevier B.V.},

abstract = {Interdigitated quantum dots, which are multiple stacks of type-I InAs/GaAs quantum dots and type-II GaSb/GaAs quantum dots, are grown using molecular beam epitaxy. By incorporating the interdigitated quantum dots into a p-i-n AlGaAs/GaAs heterojunction solar cell structure, we demonstrate a photovoltaic effect with a 20.6% improvement in open-circuit voltage, when compared to that of another cell incorporating the same quantum dots but with a p-i-n GaAs homojunction architecture. A transmission electron microscopy is performed to analyze strain-induced defects created in the multi-stack quantum dot structures. The heterojunction solar cell incorporating the interdigitated quantum dots realized in this work would find potential applications in high-efficiency single-junction intermediate band solar cells operating under concentrated sunlight. © 2019 Elsevier B.V.},

note = {cited By 1},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Kanjanachuchai2019,

title = {Au-catalyzed desorption of GaAs oxides},

author = {S Kanjanachuchai and T Wongpinij and C Euaruksakul and P Photongkam},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85063262630&doi=10.1088%2f1361-6528%2fab062e&partnerID=40&md5=f881b9c134ed9c42dfd5211c4dd1bf67},

doi = {10.1088/1361-6528/ab062e},

issn = {09574484},

year  = {2019},

date = {2019-01-01},

journal = {Nanotechnology},

volume = {30},

number = {21},

publisher = {Institute of Physics Publishing},

abstract = {Thermal desorption of native oxides on GaAs(100), (110) and (111)B surfaces around Au particles are studied in vacuum using in situ microspectroscopy. Two temperature-dependent desorption regimes, common to all surfaces, are identified. The low-temperature desorption regime spatially limited to the vicinity of some Au nanoparticles (NPs) is catalytically enhanced, resulting in oxide pinholes which expand laterally into macro holes many times the size of the catalyzing NPs and with shapes dictated by the underlying crystallography. The high-temperature desorption regime causes homogeneous oxides thinning and, ultimately, complete oxide desorption. The temperature difference between the two regimes is ∼25 °C-60 °C. After oxide desorption and depending on Au size and GaAs surface orientation, Au particles may dissolve the fresh GaAs surface and form mobile AuGa2/Ga core/shell units, or form stationary AuGa2 crystallites, or the catalyzing Au particles may run with minimal reaction with the GaAs surface. These results will add to the fundamental understanding of many Au-based nanofabrication processes, particularly the epitaxial growth of vertical and lateral nanowires. © 2019 IOP Publishing Ltd.},

note = {cited By 1},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Posri2019,

title = {Growth and Photoluminescence Properties of InSb/GaSb Nano-Stripes Grown by Molecular Beam Epitaxy},

author = {S Posri and S Thainoi and S Kiravittaya and A Tandaechanurat and N Nuntawong and S Sopitpan and V Yordsri and C Thanachayanont and S Kanjanachuchai and S Ratanathammaphan and S Panyakeow},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85054885756&doi=10.1002%2fpssa.201800498&partnerID=40&md5=c3bd9d906a071150f51c67014064263e},

doi = {10.1002/pssa.201800498},

issn = {18626300},

year  = {2019},

date = {2019-01-01},

journal = {Physica Status Solidi (A) Applications and Materials Science},

volume = {216},

number = {1},

publisher = {Wiley-VCH Verlag},

abstract = {In this study, the growth and photoluminescence (PL) properties of InSb/GaSb nano-stripes grown by molecular beam epitaxy on (001) GaSb substrate are reported. In situ reflection high-energy electron diffraction observation during InSb growth shows that the growth of InSb on GaSb surface is in Stranski–Krastanov mode and results in nano-stripe formation. The obtained nano-stripes have rectangular-based structure with the height of 25.2 ± 4.0 nm and they are elongated along [110] direction. PL emission from buried InSb/GaSb nano-stripes shows the emission peak at ≈1850 nm (0.67 eV). According to the emission energy and the structural information, low In content of ≈0.24 in nominally grown InSb/GaSb nano-stripe is estimated. Power-dependent PL spectroscopy shows a linear relation between integrated PL intensity and the excitation power. Thermal activation energy of ≈20 meV from InSb nano-stripe emission is extracted from the temperature-dependent PL spectroscopy. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim},

note = {cited By 2},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Zon2019,

title = {Growth-Rate-Dependent Properties of GaSb/GaAs Quantum Dots on (001) Ge Substrate by Molecular Beam Epitaxy},

author = {Zon and P Phienlumlert and S Thainoi and S Kiravittaya and A Tandaechanurat and N Nuntawong and S Sopitpan and V Yordsri and C Thanachayanont and S Kanjanachuchai and S Ratanathammaphan and S Panyakeow and Y Ota and S Iwamoto and Y Arakawa},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85054573343&doi=10.1002%2fpssa.201800499&partnerID=40&md5=03f4c06b9d368e1049355d20d0bdcd63},

doi = {10.1002/pssa.201800499},

issn = {18626300},

year  = {2019},

date = {2019-01-01},

journal = {Physica Status Solidi (A) Applications and Materials Science},

volume = {216},

number = {1},

publisher = {Wiley-VCH Verlag},

abstract = {Tuning growth of nanostructures can provide additional routes to engineer their characteristics. In this work, the authors report on a combined growth of GaSb/GaAs quantum dots (QDs) and growth of GaAs on (001) Ge substrate. Surface decorated with GaAs anti-phase domain is the initial template to investigate the growth-rate effects on the growth of self-assembled GaSb QDs. By varying the GaSb growth rates, QD ensembles with different morphologies are formed. Perpendicular alignment of elongated GaSb QDs is observed. Cross-sectional transmission electron microscopic images show a substantial reduction of lateral QD size when it is buried in GaAs matrix. Raman scattering as well as power-dependent photoluminescence spectroscopies are performed to reveal the optical properties of the nanostructures. Type-II band alignment characteristic is confirmed. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim},

note = {cited By 4},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Kanjanachuchai2018,

title = {Preferential nucleation, guiding, and blocking of self-propelled droplets by dislocations},

author = {S Kanjanachuchai and T Wongpinij and S Kijamnajsuk and C Himwas and S Panyakeow and P Photongkam},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85040985149&doi=10.1063%2f1.5008784&partnerID=40&md5=6b5287f8b094867fa1135aa8061910bb},

doi = {10.1063/1.5008784},

issn = {00218979},

year  = {2018},

date = {2018-01-01},

journal = {Journal of Applied Physics},

volume = {123},

number = {16},

publisher = {American Institute of Physics Inc.},

abstract = {Lattice-mismatched layers of GaAs/InGaAs are grown on GaAs(001) using molecular beam epitaxy and subsequently heated in vacuum while the surface is imaged in situ using low-energy electron microscopy, in order to study (i) the nucleation of group-III droplets formed as a result of noncongruent sublimation and (ii) the dynamics of these self-propelled droplets as they navigate the surface. It is found that the interfacial misfit dislocation network not only influences the nucleation sites of droplets, but also exerts unusual steering power over their subsequent motion. Atypical droplet flow patterns including 90° and 180° turns are found. The directions of these dislocations-guided droplets are qualitatively explained in terms of in-plane and out-of-plane stress fields associated with the buried dislocations and the driving forces due to chemical potential and stress gradients typical of Marangoni flow. The findings would benefit processes and devices that employ droplets as catalysts or active structures such as droplet epitaxy of quantum nanostructures, vapor-liquid-solid growth of nanowires, or the fabrication of self-integrated circuits. © 2018 Author(s).},

note = {cited By 1},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Narabadeesuphakorn2018,

title = {Twin InSb/GaAs quantum nano-stripes: Growth optimization and related properties},

author = {P Narabadeesuphakorn and S Thainoi and A Tandaechanurat and S Kiravittaya and N Nuntawong and S Sopitopan and V Yordsri and C Thanachayanont and S Kanjanachuchai and S Ratanathammaphan and S Panyakeow},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85042190688&doi=10.1016%2fj.jcrysgro.2018.01.030&partnerID=40&md5=24d51889bcf6105d693b0d9f5a69b87e},

doi = {10.1016/j.jcrysgro.2018.01.030},

issn = {00220248},

year  = {2018},

date = {2018-01-01},

journal = {Journal of Crystal Growth},

volume = {487},

pages = {40-44},

publisher = {Elsevier B.V.},

abstract = {Growth of InSb/GaAs quantum nanostructures on GaAs substrate by using molecular beam epitaxy with low growth temperature and slow growth rate typically results in a mixture of isolated and paired nano-stripe structures, which are termed as single and twin nano-stripes, respectively. In this work, we investigate the growth conditions to maximize the number ratio between twin and single nano-stripes. The highest percentage of the twin nano-stripes of up to 59% was achieved by optimizing the substrate temperature and the nano-stripe growth rate. Transmission electron microscopy reveals the substantial size and height reduction of the buried nano-stripes. We also observed the Raman shift and photon emission from our twin nano-stripes. These twin nano-stripes are promising for spintronics and quantum computing devices. © 2018 Elsevier B.V.},

note = {cited By 5},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Thainoi2017,

title = {Molecular beam epitaxy growth of InSb/GaAs quantum nanostructures},

author = {S Thainoi and S Kiravittaya and T Poempool and Zon and N Nuntawong and S Sopitpan and S Kanjanachuchai and S Ratanathammaphan and S Panyakeow},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85010189136&doi=10.1016%2fj.jcrysgro.2017.01.011&partnerID=40&md5=8ac8c045bcb517b94f88d6fd9d75d1db},

doi = {10.1016/j.jcrysgro.2017.01.011},

issn = {00220248},

year  = {2017},

date = {2017-01-01},

journal = {Journal of Crystal Growth},

volume = {477},

pages = {30-33},

publisher = {Elsevier B.V.},

abstract = {InSb/GaAs nanostructures grown by solid-source molecular beam epitaxy are investigated in this work. Three-dimensional dot-like InSb nanostructures are obtained by self-assembled growth at relatively low growth temperatures (250–300 °C) with slow InSb growth rate. Nanostructure base is typically elongated. Facet analysis of the free-standing InSb nanostructure grown at 250 °C shows that each nanostructure has flat top (001) surface while side facets are along <11n> directions. In contrast, InSb nanostructures grown at higher temperature show rather smooth surfaces. Analysis of their size distributions shows that the size inhomogeneity increases with the growth temperature. Moreover, Raman spectroscopy reveals both InSb-related peaks at 181 and 189 cm−1 and GaAs-related peaks at 268 and 293 cm−1. Raman spectroscopy with different excitation wavelengths is applied to probe residual strain in subsurface GaAs layer. © 2017 Elsevier B.V.},

note = {cited By 7},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Kanjanachuchai2017,

title = {Planar Self-Assembly of Submicron and Nanoscale Wires and Grooves on III-V(110) Surfaces},

author = {S Kanjanachuchai and P Photongkam},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85026865580&doi=10.1021%2facs.cgd.7b00707&partnerID=40&md5=1b752607b0c23c6f980ac5948e876d5e},

doi = {10.1021/acs.cgd.7b00707},

issn = {15287483},

year  = {2017},

date = {2017-01-01},

journal = {Crystal Growth and Design},

volume = {17},

number = {8},

pages = {4413-4421},

publisher = {American Chemical Society},

abstract = {Metallic Ga and In submicron and nanowires (NWs) tens of microns long naturally form via a self-propelled mechanism on the (110) surfaces of GaAs and InAs, respectively, during noncongruent sublimation in ultrahigh vacuum. Under stringent conditions, low-energy electron microscopy uncovers GaAs and InAs(110) surfaces on the brink of decomposition rapidly assemble planar wires of their cations in the «110» direction. For InP(110), wire formation is unfavorable due to a smooth decomposing front but can be assisted by Au nanoparticles (NPs), which sacrifice themselves to form rough pits via solid-liquid-vapor etching. The resulting self-assembled and AuNP-assisted NWs grow crystallographically in a self-sustainable manner, unless they are obstructed and consumed by stationary microdroplets, leaving emptied grooves. The findings reveal a hitherto hidden natural process on the surfaces of binary crystals capable of producing elementary submicron and nanoscale wires without extrinsic materials, paving the way for the controlled fabrication of planar NWs, grooves, and NW/groove arrays with lengths approaching circuits or even chips scale and with potential applications in self-integrated circuits, plasmonics, and fluidics. © 2017 American Chemical Society.},

note = {cited By 3},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Thainoi2017a,

title = {Growth of truncated pyramidal InSb nanostructures on GaAs substrate},

author = {S Thainoi and S Kiravittaya and T Poempool and Zon and S Sopitpan and S Kanjanachuchai and S Ratanathammaphan and S Panyakeow},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85009945358&doi=10.1016%2fj.jcrysgro.2016.11.093&partnerID=40&md5=097da5f0c36275c55c6370831e201de5},

doi = {10.1016/j.jcrysgro.2016.11.093},

issn = {00220248},

year  = {2017},

date = {2017-01-01},

journal = {Journal of Crystal Growth},

volume = {468},

pages = {737-739},

publisher = {Elsevier B.V.},

abstract = {Growth and structural characterization of InSb nanostructures formed on GaAs is presented. Saturated InSb nanostructure have a truncated pyramidal shape with rectangular base. In addition, some InSb nanostructures have twin truncated pyramidal configurations. The twin truncated pyramids align in parallel with each other and along [110] direction. We attribute the formation of rectangular base to the growth of highly mismatched InSb/GaAs system while the formation of twin configuration due to the nucleation of InSb islands on top of two-dimensional InSb plateau. The latter is suggested by an observation on the initial state of InSb nanostructure formation. © 2016 Elsevier B.V.},

note = {cited By 6},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Zon2017,

title = {Morphology of self-assembled InSb/GaAs quantum dots on Ge substrate},

author = {Zon and T Poempool and S Kiravittaya and S Sopitpan and S Thainoi and S Kanjanachuchai and S Ratanathammaphan and S Panyakeow},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85006981077&doi=10.1016%2fj.jcrysgro.2016.11.017&partnerID=40&md5=c22a57d3f971e5a2c5bbcb09d988e61e},

doi = {10.1016/j.jcrysgro.2016.11.017},

issn = {00220248},

year  = {2017},

date = {2017-01-01},

journal = {Journal of Crystal Growth},

volume = {468},

pages = {541-546},

publisher = {Elsevier B.V.},

abstract = {In this work, we report on the growth of self-assembled InSb/GaAs quantum dots (QDs) on (001) Ge substrate by molecular beam epitaxy. Due to the polar/non-polar nature of GaAs grown on Ge, antiphase domains are formed. Effects of the domain and QD growth temperature on the morphology of realized QDs are presented. InSb QDs are mostly formed at the antiphase-domain boundaries (APBs). The QD size, shape and density are varied with the QD growth temperature. These free-standing QDs have irregular lens and stripe-shapes with 10n side facets according to the analysis of atomic force microscopy images. InSb QDs is formed at the APBs, where two orthogonal GaAs surfaces are met. © 2016 Elsevier B.V.},

note = {cited By 2},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Zon2016,

title = {Raman and photoluminescence properties of type II GaSb/GaAs quantum dots on (001) Ge substrate},

author = {Zon and T Poempool and S Kiravittaya and N Nuntawong and S Sopitpan and S Thainoi and S Kanjanachuchai and S Ratanathammaphan and S Panyakeow},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84978998455&doi=10.1007%2fs13391-016-4016-x&partnerID=40&md5=8a3940d683a94fdcad4b59e626954f77},

doi = {10.1007/s13391-016-4016-x},

issn = {17388090},

year  = {2016},

date = {2016-01-01},

journal = {Electronic Materials Letters},

volume = {12},

number = {4},

pages = {517-523},

publisher = {Kluwer Academic Publishers},

abstract = {We investigate structural Raman and photoluminescence properties of type II GaSb/GaAs quantum dots (QDs) grown on (001) Ge substrate by molecular beam epitaxy. Array of self-assembled GaSb QDs having an areal density of ∼1.66 × 1010 dots/cm2 is obtained by a growth at relatively low substrate temperature (450 °C) on a GaAs surface segmented into anti-phase domains (APDs). Most of QDs form in one APD area. However, a few QDs can be observed at the APD boundaries. Raman spectroscopy is used to probe the strain in GaAs layer. Slight redshift of both LO and TO GaAs peaks are observed when GaSb QDs are buried into GaAs matrix. Optical properties of capped QDs are characterized by photoluminescence measurement at low temperatures (20 K and 30 K). Emission peaks of GaSb/GaAs QDs are found in the range of 1.0-1.3 eV at both temperatures. Slight redshift is observed when the laser excitation power is increased at 20 K while blueshift of QD peak is observed at 30 K. We attribute this abnormal behavior to the contribution of overlapped GaSb wetting layer peak in the PL emission as well as the feature of type II band structure. [Figure not available: see fulltext.] © 2016, The Korean Institute of Metals and Materials and Springer Science+Business Media Dordrecht.},

note = {cited By 6},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Eiwwongcharoen2016,

title = {Ultrathin epitaxial InAs layer relaxation on cross-hatch stress fields},

author = {W Eiwwongcharoen and N Nakareseisoon and S Thainoi and S Panyakeow and S Kanjanachuchai},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84980347933&doi=10.1039%2fc6ce01127f&partnerID=40&md5=14f1731b51655ae73c94b3061eee6a88},

doi = {10.1039/c6ce01127f},

issn = {14668033},

year  = {2016},

date = {2016-01-01},

journal = {CrystEngComm},

volume = {18},

number = {31},

pages = {5852-5859},

publisher = {Royal Society of Chemistry},

abstract = {Thin, highly-strained InAs layers epitaxially grown on GaAs/InGaAs cross-hatch surfaces undergo postgrowth transformations that yield several morphologies ranging from aligned quantum wires to quantum dots and micron-scale pyramids. The shape varieties result from the multiple pathways created from the combined/competitive effects of asymmetric adatom diffusions, subsurface stress fields and misfit energy minimization. These morphologies reveal the multiple outcomes of metastable states between the two- and the three-dimensional transition that if properly captured and engineered may open up new windows of opportunities both in devices such as sensors and in fundamental quantum studies. © 2016 The Royal Society of Chemistry.},

note = {cited By 4},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Trisna2015,

title = {Reliable synthesis of self-running Ga droplets on GaAs (001) in MBE using RHEED patterns},

author = {B A Trisna and N Nakareseisoon and W Eiwwongcharoen and S Panyakeow and S Kanjanachuchai},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84928331746&doi=10.1186%2fs11671-015-0890-7&partnerID=40&md5=c27d64decf9effac2fb6c8d19c9e598f},

doi = {10.1186/s11671-015-0890-7},

issn = {19317573},

year  = {2015},

date = {2015-01-01},

journal = {Nanoscale Research Letters},

volume = {10},

number = {1},

publisher = {Springer New York LLC},

abstract = {Self-running Ga droplets on GaAs (001) surfaces are repeatedly and reliably formed in a molecular beam epitaxial (MBE) chamber despite the lack of real-time imaging capability of a low-energy electron microscope (LEEM) which has so far dominated the syntheses and studies of the running droplets phenomenon. Key to repeatability is the observation and registration of an appropriate reference point upon which subsequent sublimation conditions are based. The reference point is established using reflection high-energy electron diffraction (RHEED), not the noncongruent temperature used in LEEM where temperature discrepancies up to 25°C against MBE is measured. Our approach removes instrumental barriers to the observation and control of this complex dynamical system and may extend the usefulness of many droplet-related processes. © 2015, Trisna et al.; licensee Springer.},

note = {cited By 8},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Kanjanachuchai2015,

title = {Excitation transfer in stacked quantum dot chains},

author = {S Kanjanachuchai and M Xu and A Jaffré and A Jittrong and T Chokamnuai and S Panyakeow and M Boutchich},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84928719302&doi=10.1088%2f0268-1242%2f30%2f5%2f055005&partnerID=40&md5=63eea598ef86420e5676800ca23f4780},

doi = {10.1088/0268-1242/30/5/055005},

issn = {02681242},

year  = {2015},

date = {2015-01-01},

journal = {Semiconductor Science and Technology},

volume = {30},

number = {5},

pages = {1-7},

publisher = {Institute of Physics Publishing},

abstract = {Stacked InAs quantum dot chains (QDCs) on InGaAs/GaAs cross-hatch pattern (CHP) templates yield a rich emission spectrum with an unusual carrier transfer characteristic compared to conventional quantum dot (QD) stacks. The photoluminescent spectra of the controlled, single QDC layer comprise multiple peaks from the orthogonal QDCs, the free-standing QDs, the CHP, the wetting layers and the GaAs substrate. When the QDC layers are stacked, employing a 10 nm GaAs spacer between adjacent QDC layers, the PL spectra are dominated by the top-most stack, indicating that the QDC layers are nominally uncoupled. Under high excitation power densities when the high-energy peaks of the top stack are saturated, however, low-energy PL peaks from the bottom stacks emerge as a result of carrier transfers across the GaAs spacers. These unique PL signatures contrast with the state-filling effects in conventional, coupled QD stacks and serve as a means to quickly assess the presence of electronic coupling in stacks of dissimilar-sized nanostructures. © 2015 IOP Publishing Ltd.},

note = {cited By 3},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Kanjanachuchai2015a,

title = {Dislocation-guided self-running droplets},

author = {S Kanjanachuchai and P Photongkam},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84920761472&doi=10.1021%2fcg5013704&partnerID=40&md5=9cf164ffdba2b1304bea469369bd08fa},

doi = {10.1021/cg5013704},

issn = {15287483},

year  = {2015},

date = {2015-01-01},

journal = {Crystal Growth and Design},

volume = {15},

number = {1},

pages = {14-19},

publisher = {American Chemical Society},

abstract = {Langmuir evaporation of stressed InSb and InAs (111)B crystals is studied using low-energy electron microscopy. The stress induces plastic relaxation by dislocation generation, whereas the evaporation results in self-running In droplets. The coexistence of in situ generated dislocations and self-running droplets allows droplet-dislocation interaction to be studied with minimal perturbation from other effects. The droplets run toward a preferred direction but are guided along dislocation lines before setting themself free once they accumulate mass and sufficient momentum to climb the energetic barrier posed by surface steps. The guiding effects are explained by surface stress which drives the mobile liquid along the dislocation line. This mechanism provides a means to control the direction of the self-running or self-propelled droplets, adding another degree of freedom to the growth and design of droplet-assisted micro- and nanostructures, for example, via interfacial dislocation network formed during heteroepitaxy. © 2014 American Chemical Society.},

note = {cited By 12},

keywords = {},

pubstate = {published},

tppubtype = {article}

}