Charge and spin dynamics in a two-dimensional electron gas

A. Pugzlys*, P. J. Rizo, K. Ivanin, A. Slachter, D. Reuter, A. D. Wieck, C. H. van der Wal, P. H. M. van Loosdrecht, A. Pugžlys

*Corresponding author for this work

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Abstract

A number of time-resolved optical experiments probing and controlling the spin and charge dynamics of the high-mobility two-dimensional electron gas in a GaAs/AlGaAs heterojunction are discussed. These include time-resolved reflectivity, luminescence, transient grating, magneto-optical Kerr effect, and electro-optical Kerr effect experiments. The optical experiments provide information on the carrier lifetimes and spin dephasing times, as well as on the carrier diffusion coefficient which directly gives the charge mobility. A combination of the two types of Kerr experiment proves to be useful in extracting both the carrier lifetimes and spin dephasing times in a single experiment.

Original languageEnglish
Article number295206
Number of pages20
JournalJournal of Physics-Condensed Matter
Volume19
Issue number29
DOIs
Publication statusPublished - 25-Jul-2007

Keywords

  • QUANTUM-WELL STRUCTURES
  • SINGLE HETEROJUNCTIONS
  • RADIATIVE RECOMBINATION
  • GAAS
  • PHOTOLUMINESCENCE
  • HETEROSTRUCTURES
  • SEMICONDUCTORS
  • SPECTROSCOPY
  • SPINTRONICS
  • RELAXATION

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