Terahertz time-domain magnetospectroscopy of a high-mobility two-dimensional electron gas

Academic Article


  • We have observed cyclotron resonance in a high-mobility GaAs/AlGaAs two-dimensional electron gas by using the techniques of terahertz time-domain spectroscopy combined with magnetic fields. From this, we calculate the real and imaginary parts of the diagonal elements of the magnetoconductivity tensor, which in turn allows us to extract the concentration, effective mass, and scattering time of the electrons in the sample. We demonstrate the utility of ultrafast terahertz spectroscopy, which can recover the true linewidth of cyclotron resonance in a high-mobility (>106 cm2 V -1 s-1) sample without being affected by the saturation effect. © 2007 Optical Society of America.
  • Authors

    Published In

  • Optics Letters  Journal
  • Digital Object Identifier (doi)

    Author List

  • Xiangfeng W; Hilton DJ; Lei R; Mittleman DM; Kono J; Reno JL
  • Start Page

  • 1845
  • End Page

  • 1847
  • Volume

  • 32
  • Issue

  • 13