Plasma excitations in a high electron mobility GaAs/AlGaAs heterostructure controlled by a visible light

Marcin Białek; Jerzy Wróbel; Vladimir Umansky; Jerzy Łusakowski

doi:10.1117/1.OE.54.1.017101

2 January 2015 Plasma excitations in a high electron mobility GaAs/AlGaAs heterostructure controlled by a visible light

Marcin Białek, Jerzy Wróbel, Vladimir Umansky, Jerzy Łusakowski

Author Affiliations +

Optical Engineering, Vol. 54, Issue 1, 017101 (January 2015). https://doi.org/10.1117/1.OE.54.1.017101

Abstract

Terahertz (THz) detector based on a GaAs/AlGaAs heterostructure was investigated at low temperatures and high magnetic fields. The response of the detector showed a feature caused by a cyclotron resonance that was accompanied by several peaks originated from excitations of magnetoplasmons. Illumination with a visible light (VIS) caused an increase of a plasma concentration and resulted in a change of a magnetoplasmon spectrum. An analysis of spectra allowed to determine changes in the plasmon dispersion with a VIS, which gives a tool to tune the THz response of a plasmonic detector.

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Marcin Białek, Jerzy Wróbel, Vladimir Umansky, and Jerzy Łusakowski "Plasma excitations in a high electron mobility GaAs/AlGaAs heterostructure controlled by a visible light," Optical Engineering 54(1), 017101 (2 January 2015). https://doi.org/10.1117/1.OE.54.1.017101

Published: 2 January 2015

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