Work

Mechanisms for the Generation of Coherent Longitudinal-Optical Phonons in GaAs / AlGaAs Multiple Quantum Wells

Year: 2001

Type: article

Abstract: We show that coherent optical phonons in GaAs multiple quantum wells are generated in a completely different way as compared to bulk GaAs. Unlike in bulk GaAs where the ultrafast screening of electric fields by photogenerated charge carriers is known to be dominant, three distinctive generation mechanisms contribute simultaneously in multiple quantum wells. The interplay between impulsive Raman scattering, forbidden Raman scattering, and screening of surface electric fields, whose relative strengths are determined by laser intensity, detuning from the exciton resonance, and the barrier width, generates a rich variety of new phenomena.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.86.1630

Authors: K. J. Yee, Y. S. Lim, T. Dekorsy, D. S. Kim

Institutions: Seoul National University, Konkuk University, Helmholtz-Zentrum Dresden-Rossendorf

Language: English

Topic: Semiconductor Quantum Structures and Devices

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: bronze

Funders: Korea Science and Engineering Foundation, Division of Materials Research

OpenAlex ID: W1989388017

FWCI: 3.85

Cites: 23

Cited by: 56

Related to: 10