Feasibility of GaN-based room temperature THz laser in a spoof plasmon waveguide

Greg Sun, Jacob B. Khurgin, Din P. Tsai

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

We propose and study the feasibility of a THz GaN/AlGaN quantum cascade laser (QCL) consisting of only five periods with confinement provided by a spoof surface plasmon (SSP) waveguide for room temperature operation. The QCL design takes advantages of the large optical phonon energy and the ultrafast phonon scattering in GaN that allow for engineering favorable laser state lifetimes, and the SSP waveguide provides the optical confinement for the ultrathin QCL. Our analysis has shown that the waveguide loss is sufficiently low for the QCL to reach its threshold at the injection current density around 6 kA/cm 2 at room temperature.

Original languageEnglish
Title of host publicationUltrafast Phenomena and Nanophotonics XVIII
DOIs
Publication statusPublished - Feb 2014
Externally publishedYes
EventUltrafast Phenomena and Nanophotonics XVIII - San Francisco, CA, United States
Duration: 2 Feb 20145 Feb 2014

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8984
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceUltrafast Phenomena and Nanophotonics XVIII
CountryUnited States
CitySan Francisco, CA
Period2/02/145/02/14

Keywords

  • GaN
  • Quantum cascade laser
  • spoof plasmon waveguide
  • Terahertz source

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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