Evolução temporal de excitações elementares em semicondutores fortemente fotoexcitados

AUTOR(ES)
DATA DE PUBLICAÇÃO

1982

RESUMO

We present a method that using a first principle theory allow us for the determination of nonlinear transport equations which describe irreversible processes in far from equilibrium systems. This method is applied to study the nonequilibrium thermodynamics and kinetics of evolution of relaxation processes in polar semiconductors under high levels of optical excitation. We also calculate the time-evolution of the number occupation function of different longitudinal optical phonon modes. The kinetic equation for this function is written in terms of the relevant thermodynamic parameters that describe the nonequilibrium macroscopic state of the system. Comparison of theory with results obtained in experiments of ultra-fast time resolved optical spectroscopy of GaAs is done, obtaining a good agreement

ASSUNTO(S)

semicondutores fisica do estado solido

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