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Proceedings Paper

Terahertz quantum cascade lasers using resonant-phonon depopulation and metal-metal waveguides
Author(s): Benjamin S. Williams; Sushil Kumar; Hans Callebaut; Stephen Kohen; Qing Hu; John L. Reno
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Paper Abstract

The recent extension of quantum cascade lasers (QCLs) from the mid-infrared to the terahertz frequency range (1-10 THz) promises to help address the relative lack of compact, coherent radiation sources in this spectral regime. We report our recent development of terahertz QCLs based on a resonant phonon depopulation scheme coupled with high-confinement, low-loss, metal-metal waveguides for mode confinement. A 3.2 THz laser (λ≈ 93.4 μm) is presented that operates in continuous wave mode up to a temperature of 93 K and up to 133 K in pulsed mode. Also presented is a 2.1 THz laser (λ ≈ 141 μm) that lases up to 40 K in continuous wave mode and 72 K in pulsed mode.

Paper Details

Date Published: 11 May 2004
PDF: 9 pages
Proc. SPIE 5365, Novel In-Plane Semiconductor Lasers III, (11 May 2004); doi: 10.1117/12.530087
Show Author Affiliations
Benjamin S. Williams, Massachusetts Institute of Technology (United States)
Sushil Kumar, Massachusetts Institute of Technology (United States)
Hans Callebaut, Massachusetts Institute of Technology (United States)
Stephen Kohen, Massachusetts Institute of Technology (United States)
Qing Hu, Massachusetts Institute of Technology (United States)
John L. Reno, Sandia National Labs. (United States)

Published in SPIE Proceedings Vol. 5365:
Novel In-Plane Semiconductor Lasers III
Claire F. Gmachl; David P. Bour, Editor(s)

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