Disorder effects on tunneling through one-dimensional double-barrier quantum-well structures: A coherent-potential approximation

1993 ◽  
Vol 47 (8) ◽  
pp. 4372-4378 ◽  
Author(s):  
Weichao Tan ◽  
J. C. Inkson ◽  
G. P. Srivastava
Keyword(s):  
Quantum Well ◽  
Coherent Potential Approximation ◽  
Potential Approximation ◽  
Double Barrier ◽  
Quantum Well Structures ◽  
One Dimensional ◽  
Disorder Effects

Optical Properties of a Quantum Well of A1−x Bx Alloy Semiconductor in the Coherent Potential Approximation

2000 ◽  
Vol 639 ◽  
Author(s):  
Yuzo Shinozuka ◽  
Hirotsugu Kida ◽  
Masanori Watarikawa
Keyword(s):  
Optical Properties ◽  
Quantum Well ◽  
Tight Binding ◽  
Impurity Band ◽  
Coherent Potential Approximation ◽  
Electron Hole ◽  
Potential Approximation ◽  
Binding Model ◽  
Rectangular Array ◽  
One Dimensional

ABSTRACTWe have theoretically studied optical properties of a quantum well (QW) in which the well region is constructed from a binary alloy semiconductor A1−xBx in the coherent potential approximation (CPA). A tight binding model is used for a single particle (electron, hole, Frenkel exciton) in the well composed by a rectangular array of NxxNyxNz sites. The effect of the diagonal randomness is reduced to the coherent potential σ(E), which is assumed to be the same for all sites, and is selfconsistently determined with the average Green's function. For a slab (∞, ∞, Nz) and wire (∞, Ny, Nz), the density of states (E) is composed of Nz (or NyxNz) subbands, each shows the two (one)-dimensional van-Hove singularity. When x (or 1−x) is small, a B (A) impurity-band always appears at the lower (higher) energy side of the lowest (highest) host-band. The change of (E) and the absorption spectrum by changing the well-width and the dimensionality is discussed in detail.

scholarly journals Type II narrow double barrier quantum well structures : Γ-X coupling and interface effects

1993 ◽  
Vol 03 (C5) ◽  
pp. 225-228
Author(s):  
B. CHASTAINGT ◽  
G. NEU ◽  
C. DEPARIS ◽  
J. MASSIES ◽  
J. MARTINEZ-PASTOR ◽  
...  
Keyword(s):  
Quantum Well ◽  
Type Ii ◽  
Double Barrier ◽  
Quantum Well Structures ◽  
Interface Effects

Exciton delocalization in thin double-barrier GaAs/AlAs/(Al,Ga)As quantum-well structures

1992 ◽  
Vol 46 (4) ◽  
pp. 2239-2243 ◽  
Author(s):  
J. Martinez-Pastor ◽  
M. Gurioli ◽  
M. Colocci ◽  
C. Deparis ◽  
B. Chastaingt ◽  
...  
Keyword(s):  
Quantum Well ◽  
Double Barrier ◽  
Quantum Well Structures

scholarly journals Photon confinement in one-dimensional photonic quantum-well structures of nanoporous silicon

2003 ◽  
Vol 126 (3) ◽  
pp. 125-128 ◽  
Author(s):  
S.H. Xu ◽  
Z.H. Xiong ◽  
L.L. Gu ◽  
Y. Liu ◽  
X.M. Ding ◽  
...  
Keyword(s):  
Quantum Well ◽  
Nanoporous Silicon ◽  
Quantum Well Structures ◽  
One Dimensional ◽  
Photon Confinement ◽  
Photonic Quantum Well

Photocurrent anomaly in double-barrier quantum well structures

1996 ◽  
Author(s):  
Stefan Ehret ◽  
Harald Schneider ◽  
Eric C. Larkins
Keyword(s):  
Quantum Well ◽  
Double Barrier ◽  
Quantum Well Structures
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