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Feasibility of spoof surface plasmon waveguide enabled ultrathin room temperature THz GaN quantum cascade laser

Published online by Cambridge University Press:  13 February 2014

Greg Sun ,
Jacob B. Khurgin  and
Din Ping Tsai
Greg Sun
Affiliation:
University of Massachusetts Boston, Boston, Massachusetts 02125, U.S.A.
Jacob B. Khurgin
Affiliation:
Johns Hopkins University, Baltimore, Maryland 21218, U.S.A.
Din Ping Tsai
Affiliation:
National Taiwan University, Taipei, Taiwan, R.O.C.
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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/cm2 at room temperature.

Keywords

lasernitridedevices
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1661: Symposium UU – Phonon-Interaction-Based Materials Design—Theory, Experiments and Applications , 2014 , mrsf13-1661-uu05-05
Copyright
Copyright © Materials Research Society 2014 

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