Optical-Properties and Switching Behavior of Excited Iii-V Semiconductors near the Direct Indirect Cross-Over

In highly excited semiconductor systems near the transition from direct to indirect band structure (cross-over) the energetic distance between different conduction band minima is a nonmonotonous function of the excitation intensity. A theoretical explanation of this experimental result is given. Our investigations are based on the evaluation of photoluminescence spectra using a careful lineshape analysis. The nonmonotony is a consequence of the unequal shrinkage of the direct and indirect gaps as a function of the population of energetically comparable conduction band valleys in a material near cross-over. In the situation discussed an optical switching mechanism is expected, which is explained with special respect to its switching time. Important problems of electron-electron interaction are discussed.


Published in:
Physica Status Solidi B-Basic Research, 173, 1, 441-452
Year:
1992
ISSN:
0370-1972
Keywords:
Note:
Ecole polytech fed lausanne,inst phys appl,ch-1015 lausanne,switzerland. Gurtler, s, univ leipzig,fachbereich phys,inst festkorperphys,linnestr 5,o-7010 leipzig,germany.
ISI Document Delivery No.: JR284
Times Cited: 4
Cited Reference Count: 16
Cited References:
BINDER R, 1991, PHYS REV B, V44, P3031
BOSIO C, 1988, PHYS REV B, V38, P3263
CAPIZZI M, 1984, PHYS REV B, V29, P2028
FIESELER H, 1991, SEMICOND SCI TECH, V6, P273
GURTLER S, 1992, QUANTUM PHYSICS COND, P193
GUZZI M, 1992, IN PRESS PHYS REV B
KALT H, 1990, 20TH P INT C PHYS SE, P2498
OLBRIGHT GR, 1991, PHYS REV B, V44, P3043
PRESS WH, 1988, NUMERICAL RECIPES C
RINKER M, 1990, APPL PHYS LETT, V57, P584
RUHLE WW, 1988, 19TH P ICPS WARS, P1391
SCHWARZ K, 1972, PHYS REV B-SOLID ST, V5, P2466
SELLONI A, 1984, PHYS REV B, V30, P821
THUSELT F, 1983, PHYS LETT A, V94, P93
VASHISHTA P, 1982, PHYS REV B, V25, P6492
ZIMMERMANN R, MANY PARTICLE THEORY, V18, P111
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