JETP Letters

, Volume 101, Issue 2, pp 108–112 | Cite as

Spectral dependence of anisotropic picosecond photoconductivity in cubic semiconductors

  • Y. V. Malevich
  • R. Adomavičius
  • A. Krotkus
  • V. Pačebutas
  • V. L. Malevich
Article
  • 51 Downloads

Abstract

The “optical pump-terahertz probe” technique is used to investigate the spectral dependence of the anisotropic picosecond photoconductivity in an InGaAs cubic semiconductor excited by femtosecond laser pulses. It is shown that the anisotropy of the photoconductivity, which is caused by the alignment of the momenta of photoexcited charge carriers and by the energy dependence of the carrier mobility, depends nonmonotonically on the photon energy of the optical pump radiation and attains a maximum when the energy of pump photons is in the vicinity of the threshold for the onset of electron transitions to the subsidiary valleys in the conduction band.

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Copyright information

© Pleiades Publishing, Inc. 2015

Authors and Affiliations

  • Y. V. Malevich
    • 1
  • R. Adomavičius
    • 1
  • A. Krotkus
    • 1
  • V. Pačebutas
    • 1
  • V. L. Malevich
    • 2
    • 3
  1. 1.Center for Physical Sciences and TechnologyVilniusLithuania
  2. 2.Stepanov Institute of PhysicsNational Academy of Sciences of BelarusMinskBelarus
  3. 3.National Research University of Information Technologies, Mechanics, and OpticsSt. PetersburgRussia

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