Observation of Retardation Effects in the Spectrum of Two-Dimensional Plasmons

DOI to cite this document:: 10.5283/epub.11345

Kukushkin, I. V. ; Smet, J. H. ; Mikhailov, Sergey A. ; Kulakovskii, D. V. ; Klitzing, Klaus von ; Wegscheider, Werner

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Date of publication of this fulltext: 14 Dec 2009 13:16

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Abstract

Retardation effects, theoretically predicted more than 35 years ago, are observed in the spectrum of two-dimensional plasmons in high-electron-mobility GaAs/AlGaAs quantum wells. In zero magnetic field, a strong reduction of the resonant plasma frequency is observed due to the hybridization of the plasma and light modes. In a perpendicular magnetic field B, hybrid cyclotron-plasmon modes appear ...