Study of electron-phonon interaction in quantum wells using optically excited nonequilibrium population of phonons

Tobias Ruf; Keith Wald; Peter Y. Yu; K. T. Tsen; H. Morkoç; K. T. Chan

doi:10.1006/spmi.1993.1039

Study of electron-phonon interaction in quantum wells using optically excited nonequilibrium population of phonons

Tobias Ruf, Keith Wald, Peter Y. Yu, K. T. Tsen, H. Morkoç, K. T. Chan

Physics

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

It is well known that nonequilibrium populations of phonons can be generated in bulk semiconductors by the relaxation of photoexcited hot electrons. In this paper we demonstrate that nonequilibrium phonons can also be generated in quantum wells by picosecond lasers and then probed by time-resolved Raman scattering. Using this method we have studied the interaction between hot electrons and interface and confined LO phonons in GaAs/AlAs quantum wells for well widths varying between 2 to 6 nm. The results are compared quantitatively with three macroscopic models of electron-LO phonon interaction. Only the model proposed by Huang and Zhu agrees both qualitatively and quantitatively with experimental results.

Original language	English (US)
Pages (from-to)	203-208
Number of pages	6
Journal	Superlattices and Microstructures
Volume	13
Issue number	2
DOIs	https://doi.org/10.1006/spmi.1993.1039
State	Published - Mar 1993

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Electrical and Electronic Engineering

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title = "Study of electron-phonon interaction in quantum wells using optically excited nonequilibrium population of phonons",

abstract = "It is well known that nonequilibrium populations of phonons can be generated in bulk semiconductors by the relaxation of photoexcited hot electrons. In this paper we demonstrate that nonequilibrium phonons can also be generated in quantum wells by picosecond lasers and then probed by time-resolved Raman scattering. Using this method we have studied the interaction between hot electrons and interface and confined LO phonons in GaAs/AlAs quantum wells for well widths varying between 2 to 6 nm. The results are compared quantitatively with three macroscopic models of electron-LO phonon interaction. Only the model proposed by Huang and Zhu agrees both qualitatively and quantitatively with experimental results.",

author = "Tobias Ruf and Keith Wald and Yu, {Peter Y.} and Tsen, {K. T.} and H. Morko{\c c} and Chan, {K. T.}",

year = "1993",

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AU - Ruf, Tobias

AU - Wald, Keith

AU - Yu, Peter Y.

AU - Tsen, K. T.

AU - Morkoç, H.

AU - Chan, K. T.

PY - 1993/3

Y1 - 1993/3

N2 - It is well known that nonequilibrium populations of phonons can be generated in bulk semiconductors by the relaxation of photoexcited hot electrons. In this paper we demonstrate that nonequilibrium phonons can also be generated in quantum wells by picosecond lasers and then probed by time-resolved Raman scattering. Using this method we have studied the interaction between hot electrons and interface and confined LO phonons in GaAs/AlAs quantum wells for well widths varying between 2 to 6 nm. The results are compared quantitatively with three macroscopic models of electron-LO phonon interaction. Only the model proposed by Huang and Zhu agrees both qualitatively and quantitatively with experimental results.

AB - It is well known that nonequilibrium populations of phonons can be generated in bulk semiconductors by the relaxation of photoexcited hot electrons. In this paper we demonstrate that nonequilibrium phonons can also be generated in quantum wells by picosecond lasers and then probed by time-resolved Raman scattering. Using this method we have studied the interaction between hot electrons and interface and confined LO phonons in GaAs/AlAs quantum wells for well widths varying between 2 to 6 nm. The results are compared quantitatively with three macroscopic models of electron-LO phonon interaction. Only the model proposed by Huang and Zhu agrees both qualitatively and quantitatively with experimental results.

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JO - Superlattices and Microstructures

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ER -

Study of electron-phonon interaction in quantum wells using optically excited nonequilibrium population of phonons

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