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

Journal Article · Sun Oct 27 23:00:00 EST 1991 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.67.2557· OSTI ID:5153940

Tsen, K T ^[1]; Wald, K R; Ruf, T; Yu, P Y ^[2]; Morkoc, H ^[3]

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1. Department of Physics, Arizona State University, Tempe, Arizona (USA)
2. Department of Physics, University of California, Berkeley, California (USA) Materials Science Division, Lawrence Berkeley Laboratory, Berkeley, California (USA)
3. Coordinated Science Laboratory, University of Illinois, Urbana, Illinois (USA)

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.

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 5153940
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 67:18; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
ALUMINIUM ARSENIDES
ALUMINIUM COMPOUNDS
ARSENIC COMPOUNDS
ARSENIDES
COMPARATIVE EVALUATIONS
COMPOSITE MATERIALS
COUPLING
DISTRIBUTION FUNCTIONS
ELECTRON-PHONON COUPLING
EVALUATION
FUNCTIONS
GALLIUM ARSENIDES
GALLIUM COMPOUNDS
LASER SPECTROSCOPY
MATERIALS
MATHEMATICAL MODELS
PHONONS
PHOTO-INDUCED TRANSIENT SPECTROSCOPY
PNICTIDES
QUASI PARTICLES
RAMAN SPECTROSCOPY
RESOLUTION
SPECTROSCOPY
TIME RESOLUTION
TIMING PROPERTIES