Two-dimensional plasmons in a GaN/AlGaN heterojunction

M. Ya Vinnichenko, V.A. Shalygin, M.D. Moldavskaya, A.A. Artemyev, Grigory A Melentev, Leonid E Vorobjev, D.A. Firsov, V. V. Korotyeyev, A.V. Sakharov, E.E. Zavarin, D.S. Arteev, W.V. Lundin, Christoffer Kauppinen, Sami Suihkonen

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Abstract

We report the studies on optical properties of a GaN/AlGaN heterostructure with a surface metal grating. The fabricated structures were optimized for the observation of 2D plasmon resonances in the spectral range of 2–5 THz. The spectra of the equilibrium optical transmission were experimentally investigated and the 2D plasmon resonance was found. The current-voltage characteristics of the grating sample and a reference sample without grating were measured and the dependence of the hot 2D electron temperature on electric field was established. Terahertz electroluminescence was studied in both samples in the sensitivity band of the Ge:Ga detector in electric fields of up to 400 V/cm. It has been shown that, due to the contribution of nonequilibrium 2D plasmons, the integral photoresponse signal for the sample with a surface metal grating increases 2–4 times as compared with the sample without grating, where the terahertz emission is due only to hot 2D electrons.
Original languageEnglish
Article number012014
Number of pages5
JournalJournal of Physics: Conference Series
Volume1199
Issue number1
DOIs
Publication statusPublished - 17 Apr 2019
MoE publication typeA4 Article in a conference publication
EventRussian Youth Conference on Physics of Semiconductors and Nanostructures, Opto- and Nanoelectronics - St. Petersburg, Russian Federation
Duration: 26 Nov 201830 Nov 2018
Conference number: 20

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