Electrically driven terahertz radiation of 2DEG plasmons in AlGaN/GaNstructures at 110 K temperature

We experimentally observed a terahertz (THz) radiation of electrically driven 2D electron gas(2DEG)plasmons inAlGaN/AlN/GaN structures at T = 110 K. The grating with a period of 1.0 μm and afilling factor of 0.35 was used to couple electromagnetic radiation out from theplasmonic sampleexcited in a p...

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Bibliographic Details
Published in:Applied physics letters 2017-05, Vol.110 (20)
Main Authors: Jakštas, V, Grigelionis, I, Janonis, V, Valušis, G, Kašalynas, I, Prystawko, P, Leszczyński, M
Format: Article
Language:English
Subjects:
Aluminum gallium nitrides
Applied physics
Black body radiation
Electroluminescence
Electromagnetic radiation
Electron gas
Far infrared radiation
Fourier transform spectrometers
Fourier transforms
Gallium nitrides
Infrared analysis
Infrared spectrometers
Plasmons
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Summary:We experimentally observed a terahertz (THz) radiation of electrically driven 2D electron gas(2DEG)plasmons inAlGaN/AlN/GaN structures at T = 110 K. The grating with a period of 1.0 μm and afilling factor of 0.35 was used to couple electromagnetic radiation out from theplasmonic sampleexcited in a pulsed regime. The peak power radiated from ungated 2DEGplasmons at afrequency of 5.0 THz under an electric field of 450 V/cm was up to 940 nW. The intensity of theradiationwas sufficient to measurespectra with aconventional far-infrared Fourier transform spectrometer. The analysis of the datarevealed that the 2DEGplasmonradiationwas superimposed with the black-body radiation of the sample and electroluminescence of theimpurities. The strategy to reach higher powers of THz emission for practical applicationsis discussed.
ISSN:0003-6951
1077-3118