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Study of Electron-phonon Interaction in Quantum Wells Using Optically Excited Nonequilibrium Population of Phonons by Tobias Ruf; Keith Wald; Peter Y. Yu; K.T. Tsen; H. Morkoç; K.T. Chan is a Physics and Astronomy article available to read on EtoBox.

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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/A1As quantum wells for well widths varying between 2 to \(6 \mathrm{~nm}\). 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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Author

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

Publisher

Elsevier Science; Elsevier ; Elsevier Inc.; Elsevier BV (ISSN 0749-6036)

Published

1993

Language

EN

Field

Physics and Astronomy (Physical Sciences)