Photoresistance of two-dimensional electron gas at sub-Terahertz frequencies

ORAL

Abstract

Extending experiments on photoresistance of ultra-high mobility 2DES to higher radiation frequencies allows to enter the regime of strong Shubnikov-de Haas oscillations (SdHO), which remains largely unexplored. This talk reports on low-temperature photoresistance measurements using frequencies from 0.2 to 0.4 THz. At higher radiation intensity, we observe a series of very strong and narrow peaks which occur near the cyclotron resonance. At lower intensities, strong peaks disappear and the data reveal a suppression of SdHO near the cyclotron resonance, and to a lesser extent, near its harmonics. These findings will be compared to existing theoretical predictions.

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Authors

  • P.D. Martin

    • School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA

  • M.A. Zudov

    • School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA

  • J.D. Watson

    • Department of Physics, Purdue University, West Lafayette, Indiana 47907, USA

  • M.J. Manfra

    • Department of Physics, Purdue University, West Lafayette, Indiana 47907, USA

  • L.N. Pfeiffer

    • Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, USA

  • K.W. West

    • Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, USA