Optical control of coherent optical phonons in bismuth films

DOI PDF 被引用文献35件
  • M. Hase
    Department of Applied Physics, Faculty of Engineering, Osaka University, Suita, Osaka 565, Japan
  • K. Mizoguchi
    Department of Applied Physics, Faculty of Engineering, Osaka University, Suita, Osaka 565, Japan
  • H. Harima
    Department of Applied Physics, Faculty of Engineering, Osaka University, Suita, Osaka 565, Japan
  • S. Nakashima
    Department of Applied Physics, Faculty of Engineering, Osaka University, Suita, Osaka 565, Japan
  • M. Tani
    Communications Research Laboratory, 588-2 Iwaoka, Nishi-ku, Kobe 651-24, Japan
  • K. Sakai
    Communications Research Laboratory, 588-2 Iwaoka, Nishi-ku, Kobe 651-24, Japan
  • M. Hangyo
    Research Center for Superconducting Materials and Electronics, Osaka University, Suita, Osaka 565, Japan

抄録

<jats:p>Interference of impulsively excited coherent phonons in semimetals has been studied by using a double-pulse pump–probe technique. Enhancement of the oscillation amplitude of an A1g mode is observed when the separation time of the double-pulse is matched to the period of the phonon oscillation, and a cancellation is observed when the separation time is adjusted to half the period of the phonon oscillation. The amplitude after the second pulse shows a sinusoidal dependence as a function of the separation time, and this dependence is explained in terms of a superposition of two coherent phonon oscillations. In addition, not only the A1g mode but also an Eg mode have been observed by electro-optic sampling.</jats:p>

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