Materials, Photonic Devices, and Sensors

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

[+] Author Affiliations
Marcin Białek, Jerzy Łusakowski

University of Warsaw, Institute of Experimental Physics, Faculty of Physics, ul. Pasteura 5, Warsaw 02-093, Poland

Jerzy Wróbel

Polish Academy of Sciences, Institute of Physics, Laboratory of Cryogenic and Spintronic Research, al. Lotników 32/46, Warsaw 02-668, Poland

Rzeszów University, Faculty of Mathematics and Natural Sciences, al. Rejtana 16A, Rzeszów 35-959, Poland

Vladmir Umansky

Weizmann Institute of Science, Faculty of Physics, Department of Condensed Matter Physics, Rehevot 76100, Israel

Opt. Eng. 54(1), 017101 (Jan 02, 2015). doi:10.1117/1.OE.54.1.017101
History: Received October 27, 2014; Accepted November 25, 2014
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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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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Marcin Białek ; Jerzy Wróbel ; Vladmir Umansky and Jerzy Łusakowski
"Plasma excitations in a high electron mobility GaAs/AlGaAs heterostructure controlled by a visible light", Opt. Eng. 54(1), 017101 (Jan 02, 2015). ; http://dx.doi.org/10.1117/1.OE.54.1.017101


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