Title

Tunable Excitation Of Two-Dimensional Plasmon Modes In Ingaas/Inp Hemt Devices For Terahertz Detection

Keywords

2DEG; detector; Graphene; HEMT; Plasmon; terahertz

Abstract

THz electromagnetic waves resonantly excite plasmons in the two dimensional electron gas (2DEG) of high electron mobility transistors (HEMTs) via grating-gate couplers. These excitations can induce measureable photoresponse. Biasing the grating gate tunes the photoresponse via control of 2DEG carrier density. Plasmons are investigated here in an InGaAs/InP HEMT with a 9 μm period grating gate at 78 and 106 GHz free-space radiation and 4K sample temperature. The dependence of the photoresponse on applied Source-Drain bias is also investigated. The minimum noise equivalent power (NEP) is estimated to be 113 pW/Hz1/2, with maximum responsivity of 200 V/W. Such plasmonic alterations in channel conductance provide a means for voltage-Tunable THz and sub-THz detectors or filters.. © 2014 SPIE.

Publication Date

1-1-2014

Publication Title

Proceedings of SPIE - The International Society for Optical Engineering

Volume

8993

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1117/12.2037062

Socpus ID

84897376438 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84897376438

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