Electron optical-phonon interactions in ultrathin GaAs/AlAs multiple quantum wells

Kong-Thon Tsen, Keith R. Wald, Tobias Ruf, Peter Y. Yu, H. Morkoç

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Abstract

Nonequilibrium populations of both confined and interface phonons generated by picosecond laser pulses in a series of GaAs/AlAs quantum wells have been studied by time-resolved picosecond Raman scattering as a function of well width. The dependence of the nonequilibrium phonon populations on well width is found to be sensitive to the theoretical model which is used to describe the electron-phonon interaction. Our data disagree with the macroscopic model of electron-phonon interaction, but they are in excellent agreement with the microscopic model proposed recently by Huang and Zhu.

Original languageEnglish (US)
Pages (from-to)2557-2560
Number of pages4
JournalPhysical Review Letters
Volume67
Issue number18
DOIs
Publication statusPublished - 1991

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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