scholarly journals Effects of internal strain and external pressure on electronic structures and optical transitions of self-assembled InxGa1−xAs/GaAs quantum dots: An experimental and theoretical study

2012 ◽  
Vol 112 (1) ◽  
pp. 014301 ◽  
Author(s):  
Yuan Wen ◽  
Mou Yang ◽  
S. J. Xu ◽  
L. Qin ◽  
Z. X. Shen
Keyword(s):  
Quantum Dots ◽  
Electronic Structures ◽  
Theoretical Study ◽  
External Pressure ◽  
Internal Strain ◽  
Optical Transitions ◽  
Self Assembled

scholarly journals A Theoretical Study of Light Absorption in Self Assembled Quantum Dots

2013 ◽  
Vol 03 (02) ◽  
pp. 243-247 ◽  
Author(s):  
Tarek A. Ameen ◽  
Yasser M. El-Batawy ◽  
A. A. Abouelsaood
Keyword(s):  
Quantum Dots ◽  
Light Absorption ◽  
Theoretical Study ◽  
Self Assembled

Effects of applied magnetic fields and hydrostatic pressure on the optical transitions in self-assembled InAs/GaAs quantum dots

2006 ◽  
Vol 18 (6) ◽  
pp. 1877-1884 ◽  
Author(s):  
C A Duque ◽  
N Porras-Montenegro ◽  
Z Barticevic ◽  
M Pacheco ◽  
L E Oliveira
Keyword(s):  
Quantum Dots ◽  
Hydrostatic Pressure ◽  
Magnetic Fields ◽  
Optical Transitions ◽  
Self Assembled

scholarly journals Theoretical study of strain-dependent optical absorption in a doped self-assembled InAs/InGaAs/GaAs/AlGaAs quantum dot

2018 ◽  
Vol 9 ◽  
pp. 1075-1084
Author(s):  
Tarek A Ameen ◽  
Hesameddin Ilatikhameneh ◽  
Archana Tankasala ◽  
Yuling Hsueh ◽  
James Charles ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Absorption ◽  
Quantum Dot ◽  
Mole Fraction ◽  
Theoretical Study ◽  
Energy Gap ◽  
Optical Transition ◽  
Binding Model ◽  
Self Assembled ◽  
Absorption Wavelength

A detailed theoretical study of the optical absorption in doped self-assembled quantum dots is presented. A rigorous atomistic strain model as well as a sophisticated 20-band tight-binding model are used to ensure accurate prediction of the single particle states in these devices. We also show that for doped quantum dots, many-particle configuration interaction is also critical to accurately capture the optical transitions of the system. The sophisticated models presented in this work reproduce the experimental results for both undoped and doped quantum dot systems. The effects of alloy mole fraction of the strain controlling layer and quantum dot dimensions are discussed. Increasing the mole fraction of the strain controlling layer leads to a lower energy gap and a larger absorption wavelength. Surprisingly, the absorption wavelength is highly sensitive to the changes in the diameter, but almost insensitive to the changes in dot height. This behavior is explained by a detailed sensitivity analysis of different factors affecting the optical transition energy.

Electronic structures of [110]-faceted self-assembled pyramidal InAs/GaAs quantum dots

1999 ◽  
Vol 59 (8) ◽  
pp. 5678-5687 ◽  
Author(s):  
Lin-Wang Wang ◽  
Jeongnim Kim ◽  
Alex Zunger
Keyword(s):  
Quantum Dots ◽  
Electronic Structures ◽  
Self Assembled

Absorption spectra and optical transitions in InAs/GaAs self-assembled quantum dots

1997 ◽  
Vol 56 (7) ◽  
pp. 4047-4050 ◽  
Author(s):  
M. A. Cusack ◽  
P. R. Briddon ◽  
M. Jaros
Keyword(s):  
Quantum Dots ◽  
Absorption Spectra ◽  
Optical Transitions ◽  
Self Assembled

Optical transitions in self-assembled quantum dots

2002 ◽  
Vol 322 (3-4) ◽  
pp. 413-418 ◽  
Author(s):  
J.L. Gondar ◽  
F. Comas
Keyword(s):  
Quantum Dots ◽  
Optical Transitions ◽  
Self Assembled
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