Infoscience

Journal article

Spontaneous Emission of Highly Excited Gaas/(Ga,Al)as Quantum-Wells

We report on a transparent analysis of the luminescence spectra of dense electron-hole plasmas confined in GaAs/(Ga,Al)As quantum wells. We fit the spectra using the fact that the total number of particle states does not depend on collision broadening. Further, the effective dispersion of the valence and conduction subbands and the dependence of the optical matrix elements on wavevector is accounted for. We find (a) that the lowest subbands shift almost rigidly with changing plasma density, and (b) that the theoreticallly calculated band gap shrinkage (random phase approximation) is always higher than the experimental values.

    Keywords: ELECTRON-HOLE PLASMA ; BAND-GAP RENORMALIZATION ; OPTICAL-PROPERTIES ; SEMICONDUCTORS ; APPROXIMATION ; TEMPERATURE ; SYSTEMS ; GAIN

    Note:

    Ecole polytech fed lausanne,inst phys appl,ch-1015 lausanne,switzerland. Bongiovanni, g, univ cagliari,dipartimento sci fis,via osped 72,i-09124 cagliari,italy.

    ISI Document Delivery No.: JV158

    Times Cited: 6

    Cited Reference Count: 25

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    Reference

    Record created on 2007-08-31, modified on 2016-08-08

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