Selective Optical Generation of Coherent Acoustic Nanocavity Modes

M. F. Pascual Winter, G. Rozas, A. Fainstein, B. Jusserand, B. Perrin, A. Huynh, P. O. Vaccaro, and S. Saravanan
Phys. Rev. Lett. 98, 265501 – Published 28 June 2007

Abstract

Femtosecond pump-probe experiments on a Ga0.85In0.15As nanocavity enclosed by two Ga0.85In0.15As/AlAs phonon Bragg mirrors reveal selective generation of terahertz confined acoustic modes and regular folded phonons. Selective generation of the confined modes alone is achievable for laser excitation at certain energies below the mirror absorption edges, corresponding to electronic transitions within the cavity layer only. Calculations based on the photoelastic effect explain the experimental results. Decay times of cavity and regular modes evidence longer decay times and anharmonic effects for the cavity mode.

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  • Received 30 January 2007

DOI:https://doi.org/10.1103/PhysRevLett.98.265501

©2007 American Physical Society

Authors & Affiliations

M. F. Pascual Winter1,2, G. Rozas1, A. Fainstein1,*, B. Jusserand2, B. Perrin2, A. Huynh2, P. O. Vaccaro3,†, and S. Saravanan3

  • 1Centro Atómico Bariloche and Instituto Balseiro, C.N.E.A., 8400 S. C. de Bariloche, R.N., Argentina
  • 2Institut des Nanosciences de Paris, CNRS, Universités Paris 6 et 7, Campus Boucicaut, 140 Rue de Lourmel, 75015 Paris, France
  • 3ATR Wave Engineering Laboratories, 2-2-2 Hikaridai, Keihanna Science City, Kyoto 619-0288, Japan

  • *afains@cab.cnea.gov.ar
  • Present address: ATR Laboratories, Sharp Corporation, 2613-1, Ichinomoto, Tenri, Nara 632-8567, Japan.

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Issue

Vol. 98, Iss. 26 — 29 June 2007

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