Anisotropy effects on the electronic transport in photoexcited GaAs

R. P. Joshi, S. El-Ghazaly, R. O. Grondin

    Research output: Contribution to journalArticlepeer-review


    We investigate the effects of both carrier and phonon k-space anisotropy on the transport in bulk GaAs photoconductors. Our results show that photogeneration by laser pulses polarized perpendicular to the electric field can delay the initial velocity rise. Furthermore, anisotropic phonon amplification can degrade the turn-off characteristics. Finally, unlike n-doped semiconductors, we find that the steady-state velocity-field values in photoconductors are reduced because of the nonequilibrium phonon modes.

    Original languageEnglish (US)
    Pages (from-to)7388-7392
    Number of pages5
    JournalJournal of Applied Physics
    Issue number12
    StatePublished - Dec 1 1990

    ASJC Scopus subject areas

    • Physics and Astronomy(all)


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