Share Email Print

Proceedings Paper

Terahertz quantum cascade lasers with metal-metal waveguides
Author(s): Benjamin S. Williams; Stephen Kohen; Sushil Kumar; Qing Hu; John L. Reno
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

Quantum cascade lasers that operate in the underdeveloped terahertz spectral range (1-10 THz) promise to contribute to applications in sensing, spectroscopy, and imaging. We describe our development of terahertz quantum cascade lasers based on the resonant-phonon depopulation concept and that use low-loss metal-metal waveguides for optical confinement. Two- and three-dimensional finite-element simulations of terahertz metal-metal waveguides are used to demonstrate their high modal confinement even for very narrow ridges. Also, simulations predict high facet reflectivities due to the modal impedance mismatch with free space at the sub-wavelength waveguide aperture of these metal-metal waveguides. Finally, we report the demonstration of a 2.8 THz laser that operates up to 97 K in continuous-wave mode fabricated using a Cu-Cu thermocompression bonding technique.

Paper Details

Date Published: 1 April 2005
PDF: 10 pages
Proc. SPIE 5738, Novel In-Plane Semiconductor Lasers IV, (1 April 2005); doi: 10.1117/12.597122
Show Author Affiliations
Benjamin S. Williams, Massachusetts Institute of Technology (United States)
Stephen Kohen, Massachusetts Institute of Technology (United States)
Sushil Kumar, 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. 5738:
Novel In-Plane Semiconductor Lasers IV
Carmen Mermelstein; David P. Bour, Editor(s)

© SPIE. Terms of Use
Back to Top
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research
Forgot your username?