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

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

doi:10.1117/12.2035364

7 March 2014 Feasibility of GaN-based room temperature THz laser in a spoof plasmon waveguide

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

Author Affiliations +

Proceedings Volume 8984, Ultrafast Phenomena and Nanophotonics XVIII; 89840B (2014) https://doi.org/10.1117/12.2035364
Event: SPIE OPTO, 2014, San Francisco, California, United States

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.

Citation Download Citation

Greg Sun, Jacob B. Khurgin, Din P. Tsai, "Feasibility of GaN-based room temperature THz laser in a spoof plasmon waveguide", Proc. SPIE 8984, Ultrafast Phenomena and Nanophotonics XVIII, 89840B (7 March 2014); doi: 10.1117/12.2035364; https://doi.org/10.1117/12.2035364

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