Investigation of Nonequilibrium Phonons in GaAs | Zendy

Danilchenko B. A. | Zendy; Poroshin V. N. | Zendy; Slutskii M. I. | Zendy; Asche M. | Zendy

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Investigation of Nonequilibrium Phonons in GaAs

Author(s) -

Danilchenko B. A.,

Poroshin V. N.,

Slutskii M. I.,

Asche M.

Publication year - 1986

Publication title -

physica status solidi (b)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.51

H-Index - 109

eISSN - 1521-3951

pISSN - 0370-1972

DOI - 10.1002/pssb.2221360107

Subject(s) - phonon , non equilibrium thermodynamics , condensed matter physics , polarization (electrochemistry) , spectral line , physics , radiation , materials science , atomic physics , optics , chemistry , quantum mechanics

The propagation of acoustic phonons in GaAs generated by laser radiation of a clean as well as Au coated surface are experimentally investigated in dependence on the crystallographic orientation. The angular dependence of the T 1 phonon spectrum is confirmed by comparison with the calculated focussing factor. Besides the ballistic motion of modes of L, T 1 , and T 2 polarization a further peak is observed in the time of flight spectra, which is interpreted by repeated conversion and decay processes of high‐frequency phonons leading to T 2 modes with a frequency low enough for ballistic motion.

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