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Low-divergence surface-emitting terahertz quantum cascade lasers

  • Jonathan A. Fan
  • , Mikhail A. Belkin
  • , Federico Capasso
  • , Suraj Khanna
  • , Mohamed Lachab
  • , Giles Davies
  • , Edmund H. Linfield

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

We investigate surface-emission via a second-order grating in terahertz quantum cascade lasers. We optimize grating design and suppress facet reflectivity with absorbing waveguide edges. Single-mode lasing, small beam divergence, and improved slope efficiency are observed.

Original languageEnglish
Title of host publicationConference on Lasers and Electro-Optics, 2007, CLEO 2007
DOIs
StatePublished - 2007
Externally publishedYes
EventConference on Lasers and Electro-Optics, 2007, CLEO 2007 - Baltimore, MD, United States
Duration: 6 May 200711 May 2007

Publication series

NameConference on Lasers and Electro-Optics, 2007, CLEO 2007

Conference

ConferenceConference on Lasers and Electro-Optics, 2007, CLEO 2007
Country/TerritoryUnited States
CityBaltimore, MD
Period6/05/0711/05/07

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