Terahertz light amplification of stimulated emission of radiation in current-injection graphene channel transistor

Stephane Albon Boubanga Tombet, D. Yadav, T. Watanabe, A. Satou, W. Knap, V. V. Popov, V. Ryzhii, T. Otsuji

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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.

Original languageEnglish
Title of host publicationMicro- and Nanotechnology Sensors, Systems, and Applications XI
EditorsThomas George, M. Saif Islam
PublisherSPIE
ISBN (Electronic)9781510626294
DOIs
Publication statusPublished - 2019 Jan 1
Event2019 Micro- and Nanotechnology (MNT) Sensors, Systems, and Applications XI Conference - Baltimore, United States
Duration: 2019 Apr 142019 Apr 18

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume10982
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

Conference2019 Micro- and Nanotechnology (MNT) Sensors, Systems, and Applications XI Conference
CountryUnited States
CityBaltimore
Period19/4/1419/4/18

Keywords

  • 2D materials
  • Amplifier
  • Graphene
  • Heterostructures
  • Laser
  • Terahertz

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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