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Proceedings Paper

Terahertz light amplification of stimulated emission of radiation in current-injection graphene channel transistor
Author(s): S. Boubanga-Tombet; D. Yadav; T. Watanabe; A. Satou; W. Knap; V. V. Popov; V. Ryzhii; T. Otsuji
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Paper Abstract

Linear and gapless energy spectrum of graphene carriers enables population inversion under optical and electrical pumping. We first theoretically discovered this phenomenon and demonstrated experimental observation of single-mode THz lasing with rather weak intensity at 100K in current-injection pumped graphene-channel field-effect transistors (GFETs). We introduce graphene surface plasmon polariton (SPP) instability to substantially boost the THz gain. We demonstrate our experimental observation of giant amplification of THz radiation at 300K stimulated by graphene plasmon instabilities in asymmetric dual-grating gate (ADGG) GFETs. Integrating the graphene SPP amplifier into a GFET laser will be a promising solution towards room-temperature intense THz lasing.

Paper Details

Date Published: 13 May 2019
PDF: 5 pages
Proc. SPIE 10982, Micro- and Nanotechnology Sensors, Systems, and Applications XI, 109822V (13 May 2019); doi: 10.1117/12.2520092
Show Author Affiliations
S. Boubanga-Tombet, Tohoku Univ. (Japan)
D. Yadav, Tohoku Univ. (Japan)
T. Watanabe, Tohoku Univ. (Japan)
A. Satou, Tohoku Univ. (Japan)
W. Knap, Institute of High Pressure Physics (Poland)
Univ. de Montpellier and CNRS (France)
V. V. Popov, Kotelnikov Institute of Radio Engineering and Electronics (Russian Federation)
V. Ryzhii, Tohoku Univ. (Japan)
T. Otsuji, Tohoku Univ. (Japan)

Published in SPIE Proceedings Vol. 10982:
Micro- and Nanotechnology Sensors, Systems, and Applications XI
Thomas George; M. Saif Islam, Editor(s)

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