Coherent Zone-Folded Longitudinal Acoustic Phonons in Semiconductor Superlattices: Excitation and Detection | Zendy

A. Bartels | Zendy; T. Dekorsy | Zendy; H. Kurz | Zendy; K. Köhler | Zendy

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Coherent Zone-Folded Longitudinal Acoustic Phonons in Semiconductor Superlattices: Excitation and Detection

Author(s) -

A. Bartels,

T. Dekorsy,

H. Kurz,

K. Köhler

Publication year - 1999

Publication title -

physical review letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.688

H-Index - 673

eISSN - 1079-7114

pISSN - 0031-9007

DOI - 10.1103/physrevlett.82.1044

Subject(s) - superlattice , phonon , femtosecond , excited state , excitation , raman scattering , scattering , laser , physics , condensed matter physics , amplitude , semiconductor , optics , materials science , atomic physics , raman spectroscopy , optoelectronics , quantum mechanics

Coherent zone-folded acoustic phonons are excited in GaAs/AlAs superlattices by femtosecond laser pulses via resonant impulsive stimulated Raman scattering in both forward and backward scattering directions. The relative amplitudes of three distinct modes of first and second backfolded order match well with scattering intensities calculated within an elastic continuum model. The detection of the coherent acoustic modes is based on the modulation of the interband transitions via the acoustic deformation potential and exhibits a strong enhancement at interband transitions

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