Ultrafast spin dynamics in GaAs/GaSb/InAs heterostructures probed by second harmonic generation

Academic Article

Abstract

  • We report the application of pump-probe second harmonic generation (SHG) to monitor spin dynamics in nonmagnetic semiconductor heterostructures. Spin-polarized electrons were selectively excited by a pump beam in the GaAs layer of GaAs/GaSb/InAs structures. However, the induced magnetization manifests itself through the SHG probe signal from the GaSb/InAs interface, thus indicating a spin-polarized electron transport. We find that the magnetization dynamics is governed by an interplay between the spin density evolution at the interfaces and the spin relaxation. © 2002 American Institute of Physics.
  • Authors

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    Digital Object Identifier (doi)

    Author List

  • Glinka YD; Shahbazyan TV; Perakis IE; Tolk NH; Liu X; Sasaki Y; Furdyna JK
  • Start Page

  • 220
  • End Page

  • 222
  • Volume

  • 81
  • Issue

  • 2