Photoresponse of a two-dimensional electron gas at the second harmonic of the cyclotron resonance

M. Białek, J. Łusakowski, M. Czapkiewicz, J. Wróbel, and V. Umansky
Phys. Rev. B 91, 045437 – Published 29 January 2015

Abstract

Terahertz spectroscopy experiments at magnetic fields and low temperatures were carried out on samples of different gate shapes processed on a high electron mobility GaAs/AlGaAs heterostructure. For a given radiation frequency, multiple magnetoplasmon resonances were observed with a dispersion relation described within a local approximation of the magnetoconductivity tensor. The second harmonic of the cyclotron resonance was observed and its appearance was interpreted as resulting from a high-frequency, inhomogeneous electromagnetic field on the border of a two-dimensional electron gas with a metallic gate and/or an ohmic contact.

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  • Received 9 October 2014
  • Revised 13 January 2015

DOI:https://doi.org/10.1103/PhysRevB.91.045437

©2015 American Physical Society

Authors & Affiliations

M. Białek and J. Łusakowski*

  • Faculty of Physics, University of Warsaw, ulica Pasteura 5, 02-093 Warsaw, Poland

M. Czapkiewicz

  • Institute of Physics, Polish Academy of Sciences, Aleja Lotników 32/46, 02-668 Warsaw, Poland

J. Wróbel

  • Institute of Physics, Polish Academy of Sciences, Aleja Lotników 32/46, 02-668 Warsaw, Poland and Faculty of Mathematics and Natural Sciences, Rzeszów University, Aleja Rejtana 16A, 35-959 Rzeszów, Poland

V. Umansky

  • Weizmann Institute of Science, Rehovot 76100, Israel

  • *jerzy.lusakowski@fuw.edu.pl

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Vol. 91, Iss. 4 — 15 January 2015

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