Papers devoted to the 80th jubilee of Vladilen Letokhov

Femtosecond dynamics of cavity modes in ZnSe films on a metal

E. A. Vinogradov

Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, Moscow

Abstract: The ultrafast evolution of cavity modes in a ZnSe film on a metal (Cr, Cu, or Ni) is studied by femtosecond pump/supercontinuum-probe spectroscopy on a time scale of several tens of femtoseconds. Femtosecond excitation of a microcavity in a ZnSe film on a metal substrate leads to a change in the parameters of cavity (Fabry–Perot) modes. The cavity-mode frequency shifts are due to the photoinduced changes in the boundary conditions and the optical thickness of microcavity.

Keywords: femtosecond spectroscopy, semiconductor films, cavity mode, boundary conditions, permittivity, Schottky barrier.

Received: 24.12.2019

 English version: Quantum Electronics, 2020, 50:3, 246–251

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