Influence of the internal heterostructure on nonlinear absorption spectra for intersubband transitions in spherical quantum dot–quantum well nanoparticles

2012 ◽  
Vol T149 ◽  
pp. 014055 ◽  
Author(s):  
R Kostić ◽  
D Stojanović
Keyword(s):  
Quantum Dot ◽  
Quantum Well ◽  
Absorption Spectra ◽  
Nonlinear Absorption ◽  
Intersubband Transitions ◽  
Spherical Quantum Dot

Mechanisms of Intersubband Transition in n-Type III-V Quantum Well Superlattice and Improvement on Absorption for TE Polarized Field

1999 ◽  
Vol 607 ◽  
Author(s):  
C. W. Cheah ◽  
G. Karunasiri ◽  
L. S. Tan
Keyword(s):  
Quantum Well ◽  
Absorption Spectra ◽  
Function Approximation ◽  
Theoretical Study ◽  
Material System ◽  
Intersubband Transition ◽  
Intersubband Transitions ◽  
Quantum Well Infrared Photodetectors ◽  
Material Systems ◽  
Excited Transition

AbstractIn this paper, the theoretical study of intersubband transitions in quantum well infrared photodetectors (QWIPs) applying the eight bands k.p model incorporated with envelope function approximation is described. The focus of the work is on the intersubband transition in n-type IIIV QWIP based on AIGaAs/GaAs and AlGaAs/InGaAs material system, with particular emphasis placed on the physics of TE excited transition and the improvement of resulted absorption. Various theoretical absorption spectra of the two material systems are compared, the distinct mechanisms of the intersubband transition for the two material systems are proposed. Possible ways of improving on the absorption for such excitation are also investigated and discussed.

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