Surface Vibrational Modes and Reflection Time of Phonons in a Finite-Size Superlattice.

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  • MIZUNO Seiji
    Department of Applied Physic, Hokkaido University Institut für Theoretische Physik, Technische Universität Dresden

Bibliographic Information

Other Title
  • 超格子における表面振動モードとフォノンの反射時間　　基板側からの表面フォノンの検出・励起
  • 基板側からの表面フォノンの検出・励起

Abstract

We discuss the interaction of bulk phonons with surface vibrational modes in a finite-size superlattice. The incident phonons injected normally on the superlattice from a substrate are perfectly reflected, i.e., the reflection ratee is unity irrespective of frequency. However, these phonons come back to the substrate with a large time delay when the frequency coincides with an eigenfrequency of the surface mode. This is due to the resonant interaction of the incident phonons with a surface vibrational mode. The results suggest that the surface vibrational modes are detectable from the other side of the surface by a time-resolved phonon reflection experiment.

Journal

  • Hyomen Kagaku

    Hyomen Kagaku 20 (4), 272-278, 1999

    The Surface Science Society of Japan

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