Optical Amplification and Its Saturation in Semiconductor Quantum-Wells
We present an investigation of the optical gain and its saturation of the electron-hole plasma confined in GaAs/(Ga,Al)As quantum wells. For such investigations the variable stripe length method is a simple but quite powerful tool. The spacial longitudinal variation of luminous and electron-hole pair densities in narrow stripes of various lengths has been investigated theoretically and experimentally. For this also the spectra of spontaneous luminescence (emitted in a direction perpendicular to the stripe) have been recorded at different places on the stripe. The experimental results are compared with the predictions of a theoretical model of the optical quantum well amplifier. We find that saturation is caused by carrier depopulation through stimulated electron-hole recombination, and by the loss of light travelling in the direction of the stripe due to scattering and/or reabsorption. However, we do not find evidence of intra band saturation, ie. of a non thermal electron or hole distribution.
1993
3
C5
31
38
Univ cagliari,dipartimento sci fisiche,i-09124 cagliari,italy. Butty, j, ecole polytech fed lausanne,ph ecublens,inst phys appl,ch-1015 lausanne,switzerland.
ISI Document Delivery No.: ML215
Cited Reference Count: 27
Cited References:
AGRAWAL GP, 1986, LONG WAVELENGTH SEMI, CH6
ASADA M, 1989, IEEE J QUANTUM ELECT, V25, P2019
BEBB HB, 1972, SEMICONDUCT SEMIMET, V8, P181
BLOOD P, 1991, J APPL PHYS, V70, P1144
BONGIOVANNI G, 1990, SUPERLATTICE MICROST, V8, P81
BONGIOVANNI G, 1991, SOLID STATE COMMUN, V80, P473
BONGIOVANNI G, 1992, PHYS STATUS SOLIDI B, V173, P355
BONGIOVANNI G, 1992, PHYS STATUS SOLIDI B, V173, P365
BONGIOVANNI G, 1992, SOLID STATE COMMUN, V84, P307
BUTTY J, 1993, SOLID STATE COMMUN, V86, P155
CASEY HC, 1978, HETEROSTRUCTURE LA A
CINGOLANI R, 1990, PHYS REV B, V42, P2893
DANKNER Y, 1990, SPIE, V1283, P326
DEVAUD B, 1990, SUPERLATTICE MICROST, V8, P85
GOEBEL E, 1977, IEEE J QUANTUM ELECT, V13, P849
HAKKI BW, 1975, J APPL PHYS, V46, P1299
HENRY CH, 1980, J APPL PHYS, V51, P3042
HVAM JM, 1978, J APPL PHYS, V49, P3124
KESLER MP, 1991, IEEE J QUANTUM ELECT, V37, P1812
MILES RO, 1992, IEE PROC-J, V139, P33
SCHMITTRINK S, 1985, J LUMIN, V30, P585
SCHMITTRINK S, 1989, ADV PHYS, V38, P89
SCHWENDIMANN P, 1992, PHYS REV B, V46, P7479
SHAKLEE KL, 1973, J LUMIN, V7, P284
THOAI DBT, 1993, PHYS REV B, V47, P3574
WEBER C, 1988, PHYS REV B, V38, P12748
ZIELINSKI E, 1987, IEEE J QUANTUM ELECT, V23, P969
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