Theory for displacive excitation of coherent phonons.

  title={Theory for displacive excitation of coherent phonons.},
  author={Zeiger and Vidal and Cheng and Ippen and Dresselhaus},
  journal={Physical review. B, Condensed matter},
  volume={45 2},
  • Zeiger, Vidal, +2 authors Dresselhaus
  • Published 1992
  • Medicine, Physics
  • Physical review. B, Condensed matter
  • We report femtosecond time-resolved pump-probe reflection experiments in semimetals and semiconductors that show large-amplitude oscillations with periods characteristic of lattice vibrations. Only ${\mathit{A}}_{1}$ modes are detected, although modes with other symmetries are observed with comparable intensity in Raman scattering. We present a theory of the excitation process in this class of materials, which we refer to as displacive excitation of coherent phonons (DECP). In DECP, after… CONTINUE READING
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