Coherent plasmon-phonon oscillations in a GaAs schottky barrier sample

P.J. Hall, van, W. Jong, de, A.F. Etteger, van, T.H.M. Rasing

Research output: Contribution to journalArticleAcademicpeer-review


We have observed coherent plasmon–phonon oscillations in a biased GaAs–Au Schottky barrier sample excited by intense fs laser pulses using time resolved Second Harmonic Generation. The results are compared with Monte-Carlo simulations. To account for the observed dependence of the frequency on the excitation density it was necessary to separate the electric field in two components: one due to the space charge and the other following from the lattice polarization. In this way a coupling between the plasmon and the LO phonons is obtained, which resulted in a nearly perfect description of the experimentally observed frequencies.
Original languageEnglish
Pages (from-to)91-94
Number of pages4
JournalPhysica Status Solidi B
Issue number1
Publication statusPublished - 1997


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