Title

Tunable Far-Ir Detectors/Filters Based On Plasmons In Two Dimensional Electron Gases In Ingaas/Inp Heterostructures

Keywords

2-deg; HEMT; Plasmon; Terahertz

Abstract

Plasmons can be generated with photons in the two dimensional electron gas (2-deg) of high electron mobility transistors (HEMTs). Because the plasmon frequency at a given wavevector depends on sheet charge density, a gate bias can tune the plasmon resonance. This effect allows a properly designed HEMT to be used as a voltage-tunable narrow-band detector or filter. This work reports on both the theory and design of such a device in the InP materials system and discusses its potential uses. By using a sub-micron grating to couple incident radiation to a high sheet charge 2-deg, a minimum detectible wavelength of roughly 26 microns is obtained. Fabrication issues, terahertz response, and tunability are discussed. Because of its small size, this novel device could find use in spaceborne remote sensing application.

Publication Date

12-1-2007

Publication Title

Proceedings of SPIE - The International Society for Optical Engineering

Volume

6678

Number of Pages

-

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1117/12.729298

Socpus ID

42149117135 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/42149117135

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