Computing optical absorption spectra from first principles: Self-energy and electron-hole interaction effects

1998 ◽  
Vol 20 (7-8) ◽  
pp. 949-956 ◽  
Author(s):  
S. Albrecht ◽  
L. Reining ◽  
G. Onida ◽  
R. Del Sole
Keyword(s):  
Optical Absorption ◽  
Absorption Spectra ◽  
First Principles ◽  
Interaction Effects ◽  
Optical Absorption Spectra ◽  
Electron Hole ◽  
Self Energy ◽  
Hole Interaction

QUANTUM CONFINEMENT AND COULOMB EFFECTS IN SEMICONDUCTOR QUANTUM DOTS

1990 ◽  
Vol 04 (16) ◽  
pp. 1009-1016 ◽  
Author(s):  
Y.Z. HU ◽  
S.W. KOCH ◽  
D.B. TRAN THOAI
Keyword(s):  
Quantum Dots ◽  
Optical Absorption ◽  
Absorption Spectra ◽  
Quantum Confinement ◽  
Semiconductor Quantum Dots ◽  
Optical Absorption Spectra ◽  
Electron Hole ◽  
Quantum Confinement Effects ◽  
Electron Hole Pair ◽  
Coulomb Effects

Coulomb and quantum confinement effects in small semiconductor microcrystallites are analyzed. Energies and wavefunctions for one- and two-electron-hole-pair states are computed and optical absorption spectra are evaluated.

OPTICAL ABSORPTION OF CONFINED EXCITONS IN Tl HALIDE THIN FILMS

2001 ◽  
Vol 15 (28n30) ◽  
pp. 3769-3772
Author(s):  
A. FUJII ◽  
T. ONO ◽  
W. YU ◽  
R. MAKI
Keyword(s):  
Thin Films ◽  
Optical Absorption ◽  
Size Effect ◽  
Exchange Interaction ◽  
Absorption Spectra ◽  
Crystal Size ◽  
Experimental Results ◽  
Optical Absorption Spectra ◽  
Electron Hole ◽  
Quantum Size

Optical absorption spectra of the direct exciton of TlCl and TlBr micro-crystals are measured in evaporated thin films at 5.0K. The energy of the direct exciton bands shift to higher energy with decreasign micro-crystal size. The lower component of the doublet of the exciton in TlCl decreases its intensity with decreasing micro-crystal size. The experimental results are discussed with the quantum-size effect on the exciton states and on the electron-hole exchange interaction in an exciton.

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