Near-bandgap wavelength dependence of long-lived traveling coherent longitudinal acoustic phonons in GaSb-GaAs heterostructures

Academic Article


  • We report first studies of long-lived oscillations in optical pump-probe measurements on GaSb-GaAs heterostructures. The oscillations arise from a photogenerated coherent longitudinal acoustic phonon wave, which travels from the top surface of GaSb across the interface into the GaAs substrate, providing information on the optical properties of the material as a function of time/depth. Wavelength-dependent studies of the oscillations near the bandgap of GaAs indicate strong correlations to the optical properties of GaAs. © 2006 The American Physical Society.
  • Authors

    Digital Object Identifier (doi)

    Author List

  • Miller JK; Qi J; Xu Y; Cho YJ; Liu X; Furdyna JK; Perakis I; Shahbazyan TV; Tolk N
  • Volume

  • 74
  • Issue

  • 11