Optical properties of self-assembled InAs quantum dots grown on InAlAs/InP(001)

2002 ◽  
Vol 737 ◽  
Author(s):  
B. Salem ◽  
T. Benyattou ◽  
G. Guillot ◽  
G. Bremond ◽  
J. Brault ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Excited States ◽  
Molecular Beam ◽  
Growth Parameters ◽  
Exciton Dissociation ◽  
Inas Quantum Dots ◽  
Self Organized ◽  
Component Spectrum ◽  
Pl Intensity ◽  
Lattice Matched

ABSTRACTSelf-organized InAs quantum islands (QIs) were grown in the Stranski-Krastanov regime, by solid source molecular beam epitaxy (SSMBE), on In0.52Al0.48As layer lattice matched to InP(001) substrate. The growth parameters are chosen to produce dot shaped InAs islands as indicated by the photoluminescence (PL) linear polarization which is about 9%. The PL spectrum reveals several resolvable components. PL versus power excitation and photoluminescence excitation (PLE) measurements show clearly that this multi-component spectrum is related to emission from transitions associated to fundamental and related excited states of quantum dots (QDs) having monolayer-height fluctuations. The integrated PL intensities have been measured as a function of temperature in the 8–300 K range. The PL intensity measured at 300K is only 8 times lower than at 8 K, indicating good carrier confinement in these InAs/InAlAs QDs. An enhancement of the PL intensity in the 8–90 K temperature range has been tentatively attributed to the exciton dissociation from the InAlAs barriers which then recombine radiatively in the InAs QDs.

Formation of Ultra-low Density (≤104cm-2) Self-Organized InAs Quantum Dots on GaAs by a Modified Molecular Beam Epitaxy Method

2008 ◽  
Vol 1 ◽  
pp. 061202 ◽  
Author(s):  
Masato Ohmori ◽  
Takuya Kawazu ◽  
Kousuke Torii ◽  
Takuji Takahashi ◽  
Hiroyuki Sakaki
Keyword(s):  
Quantum Dots ◽  
Molecular Beam Epitaxy ◽  
Molecular Beam ◽  
Low Density ◽  
Inas Quantum Dots ◽  
Self Organized ◽  
Molecular Beam Epitaxy Method

Improvement of self-organized InAs quantum dots growth by molecular beam epitaxy

2005 ◽  
Vol 276 (1-2) ◽  
pp. 72-76 ◽  
Author(s):  
Z.L. Miao ◽  
S.J. Chua ◽  
Y.H. Chye ◽  
P. Chen ◽  
S. Tripathy
Keyword(s):  
Quantum Dots ◽  
Molecular Beam Epitaxy ◽  
Molecular Beam ◽  
Inas Quantum Dots ◽  
Self Organized

Selective Formation of Self-Organized InAs Quantum Dots Grown on Patterned GaAs Substrates by Molecular Beam Epitaxy

2006 ◽  
Vol 45 (4B) ◽  
pp. 3556-3559 ◽  
Author(s):  
Akio Ueta ◽  
Kouichi Akahane ◽  
Shin-ichioro Gozu ◽  
Naokatsu Yamamoto ◽  
Naoki Ohtani
Keyword(s):  
Quantum Dots ◽  
Molecular Beam Epitaxy ◽  
Molecular Beam ◽  
Inas Quantum Dots ◽  
Self Organized ◽  
Gaas Substrates ◽  
Selective Formation

Enhanced Photoluminescence from Long Wavelength InAs Quantum Dots Embedded in a Graded (In,Ga)As Quantum Well

2001 ◽  
Vol 692 ◽  
Author(s):  
L. Chen ◽  
V. G. Stoleru ◽  
D. Pal ◽  
D. Pan ◽  
E. Towe
Keyword(s):  
Quantum Dots ◽  
Molecular Beam Epitaxy ◽  
Quantum Well ◽  
Molecular Beam ◽  
Composition Profile ◽  
Inas Quantum Dots ◽  
Long Wavelength ◽  
Enhanced Photoluminescence ◽  
Self Organized ◽  
Ingaas Quantum Well

AbstractThree sets of self-organized InAs quantum dots (QDs) embedded in an external InGaAs quantum well samples were grown by solid source molecular beam epitaxy (MBE). By modifying Indium composition profile within quantum well (QW) region, it's found the photoluminescence emission from quantum dots can be greatly enhanced when employing a graded quantum well to surround QDs. This quantum dots in a graded quantum well structure also preserves the long wavelength (1.3 μm) spectrum requirement for the future use in optoelectronics devices.

Enhanced Photoluminescence from Long Wavelength InAs Quantum Dots Embedded in a Graded (In,Ga)As Quantum Well

2001 ◽  
Vol 707 ◽  
Author(s):  
L. Chen ◽  
V. G. Stoleru ◽  
D. Pan ◽  
E. Towe
Keyword(s):  
Quantum Dots ◽  
Molecular Beam Epitaxy ◽  
Quantum Well ◽  
Molecular Beam ◽  
Composition Profile ◽  
Inas Quantum Dots ◽  
Long Wavelength ◽  
Enhanced Photoluminescence ◽  
Self Organized ◽  
Ingaas Quantum Well

ABSTRACTThree sets of self-organized InAs quantum dots (QDs) embedded in an external InGaAs quantum well samples were grown by solid source molecular beam epitaxy (MBE). By modifying Indium composition profile within quantum well (QW) region, it's found the photoluminescence emission from quantum dots can be greatly enhanced when employing a graded quantum well to surround QDs. This quantum dots in a graded quantum well structure also preserves the long wavelength (1.3 μm) spectrum requirement for the future use in optoelectronics devices.

Growth of self-organized InAs quantum dots on InP by solid-source molecular beam epitaxy

2000 ◽  
Vol 216 (1-4) ◽  
pp. 57-61 ◽  
Author(s):  
Q.D Zhuang ◽  
S.F Yoon ◽  
H.Q Zheng ◽  
K.H Yuan
Keyword(s):  
Quantum Dots ◽  
Molecular Beam Epitaxy ◽  
Molecular Beam ◽  
Inas Quantum Dots ◽  
Self Organized

scholarly journals Influence of TOPO and TOPO-CdSe/ZnS Quantum Dots on Luminescence Photodynamics of InP/InAsP/InPHeterostructure Nanowires

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 640
Author(s):  
Artem I. Khrebtov ◽  
Vladimir V. Danilov ◽  
Anastasia S. Kulagina ◽  
Rodion R. Reznik ◽  
Ivan D. Skurlov ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Excited States ◽  
Molecular Beam ◽  
Surface Passivation ◽  
Low Energy ◽  
Trioctylphosphine Oxide ◽  
Reverse Transfer ◽  
Semiconductor Heterostructure ◽  
Ligand Type

The passivation influence by ligands coverage with trioctylphosphine oxide (TOPO) and TOPO including colloidal CdSe/ZnS quantum dots (QDs) on optical properties of the semiconductor heterostructure, namely an array of InP nanowires (NWs) with InAsP nanoinsertion grown by Au-assisted molecular beam epitaxy on Si (111) substrates, was investigated. A significant dependence of the photoluminescence (PL) dynamics of the InAsP insertions on the ligand type was shown, which was associated with the changes in the excitation translation channels in the heterostructure. This change was caused by a different interaction of the ligand shells with the surface of InP NWs, which led to the formation of different interfacial low-energy states at the NW-ligand boundary, such as surface-localized antibonding orbitals and hybridized states that were energetically close to the radiating state and participate in the transfer of excitation. It was shown that the quenching of excited states associated with the capture of excitation to interfacial low-energy traps was compensated by the increasing role of the “reverse transfer” mechanism. As a result, the effectiveness of TOPO-CdSe/ZnS QDs as a novel surface passivation coating was demonstrated.

Uniform formation process of self-organized InAs quantum dots

2002 ◽  
Vol 237-239 ◽  
pp. 1301-1306 ◽  
Author(s):  
Koichi Yamaguchi ◽  
Toshiyuki Kaizu ◽  
Kunihiko Yujobo ◽  
Yoshikuni Saito
Keyword(s):  
Quantum Dots ◽  
Formation Process ◽  
Inas Quantum Dots ◽  
Self Organized
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