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Plasmon Resonance Response To Millimeter-Waves Of Grating-Gated Ingaas/Inp Hemt
Authors
Justin W. Cleary
Nima Nader Esfahani
+3 more
Christopher J. Fredricksen
Guatam Medhi
R. E. Peale
Publication date
19 September 2011
Publisher
'Information Bulletin on Variable Stars (IBVS)'
Abstract
Tunable resonant absorption by plasmons in the two-dimensional electron gas (2DEG) of grating-gated HEMTs is known for a variety of semiconductor systems, giving promise of chip-scale frequency- agile THz imaging spectrometers. In this work, we present our approach to measurement of electrical response to millimeter waves from backward-wave oscillators (BWO) in the range 40-110 GHz for InP-based HEMTs. Frequency-modulation of the BWO with lock-in amplification of the source-drain current gives an output proportional to the change in absorption with frequency without contribution from non-resonant response. This is a first step in optimizing such devices for manportable or space-based spectral-sensing applications. © 2010 SPIE
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Last time updated on 18/10/2022