Superradiance of excitons in multi-quantum-well structures based on InAs-GaSb coupled quantum wells

2005 ◽  
Author(s):  
Boris Laikhtman
Keyword(s):  
Quantum Well ◽  
Quantum Wells ◽  
Coupled Quantum Wells ◽  
Quantum Well Structures ◽  
Multi Quantum Well

Quantum Confinement Stark Effect of Different Gainnas Quantum Well Structures

2013 ◽  
Vol 773 ◽  
pp. 622-627
Author(s):  
Ying Ning Qiu ◽  
Wei Sheng Lu ◽  
Stephane Calvez
Keyword(s):  
Electric Field ◽  
Quantum Well ◽  
Quantum Wells ◽  
External Electric Field ◽  
Quantum Confinement ◽  
Stark Effect ◽  
Band Gap Energy ◽  
Electron Effective Mass ◽  
Coupled Quantum Wells ◽  
Quantum Well Structures

The quantum confinement Stark effect of three types of GaInNAs quantum wells, namely single square quantum well, stepped quantum wells and coupled quantum wells, is investigated using the band anti-crossing model. The comparison between experimental observation and modeling result validate the modeling process. The effects of the external electric field and localized N states on the quantized energy shifts of these three structures are compared and analyzed. The external electric field applied to the QW not only changes the potential profile but also modulates the localized N states, which causes band gap energy shifts and increase of electron effective mass.

Local Atomic Interdiffusion in CdTe/HgCdTe Multilayered Structures

1988 ◽  
Vol 144 ◽  
Author(s):  
Y. Kim ◽  
A. Ourmazd ◽  
R. D. Feldman ◽  
J. A. Rentschler ◽  
D. W. Taylor ◽  
...  
Keyword(s):  
Quantum Well ◽  
Quantum Wells ◽  
Quantitative Composition ◽  
Lattice Imaging ◽  
Multilayered Structures ◽  
Quantum Well Structures ◽  
Composition Profiles ◽  
Digital Pattern ◽  
The Stability ◽  
Multi Quantum Well

ABSTRACTWe combine chemical lattice imaging with digital pattern recognition to study atomic interdiffusion at individual CdTe/HgCdTe interfaces in multi-quantum well structures. In this way we obtain quantitative composition profiles for “as grown” samples, and investigate their development as a function of annealing temperature. Our results indicate that interdiffusion depends on the position of the quantum well with respect to the surface, beginning first at quantum wells close to the surface, and proceeding towards the substrate. Our approach allows the quantification of interdiffusion as a function of time, temperature, and distance from the surface. The implications of these results for the stability of CdTe/HgCdTe structures, and the interpretation of X-ray data are discussed.

Electronic Properties of Dislocations in Heavily Dislocated Quantum well Structures: Doping Effects

1989 ◽  
Vol 145 ◽  
Author(s):  
T. Y. Liu ◽  
P. M. Petroff ◽  
H. Kroemer ◽  
A. C. Gossard
Keyword(s):  
Low Temperature ◽  
Dislocation Density ◽  
Quantum Well ◽  
Quantum Wells ◽  
Electronic Properties ◽  
The Other ◽  
Quantum Well Structures ◽  
Luminescence Efficiency ◽  
Doping Effects ◽  
Multi Quantum Well

AbstractIn heavily dislocated GaAs (dislocation density of 108cm-2), the low-temperature cathodo- luminescence efficiency of quantum wells and superlattices is dramatically higher than that of a bulk-like layer. Furthermore, the luminescence efficiency can be further improved by doping the barriers of the GaAs/(Al,Ga)As multi-quantum well structures with beryllium (Be). Two quite different possible models for this observation are discussed: One assumes that the effect is due to the expulsion of dislocation kinks from the wells, the other that it is due to the effect of well width fluctuations.

InGaN∕GaN multi-quantum-well structures on (111)-oriented bonded silicon-on-insulator substrates

2005 ◽  
Vol 87 (11) ◽  
pp. 111908 ◽  
Author(s):  
L. S. Wang ◽  
S. Tripathy ◽  
S. J. Chua ◽  
K. Y. Zang
Keyword(s):  
Quantum Well ◽  
Silicon On Insulator ◽  
Quantum Well Structures ◽  
Multi Quantum Well

Dispersion of photoluminescence peak positions in asymmetric InAs QD multi quantum well structures

2011 ◽  
Vol 8 (4) ◽  
pp. 1388-1390 ◽  
Author(s):  
J. L. Casas Espínola ◽  
T. V. Torchynska ◽  
G. Polupan ◽  
M. Ojeda Martínez
Keyword(s):  
Quantum Well ◽  
Quantum Well Structures ◽  
Multi Quantum Well ◽  
Photoluminescence Peak
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