Abstract
We report the demonstration of distributed-feedback terahertz quantum-cascade lasers based on a first-order grating fabricated via a lateral corrugation in a double-sided metal ridge waveguide. The phase of the facet reflection was precisely set by lithographically defined facets by dry etching. Single-mode emission was observed at low to moderate injection currents, although multimode emission was observed far beyond threshold owing to spatial hole burning. Finite-element simulations were used to calculate the modal and threshold characteristics for these devices, with results in good agreement with experiments.
© 2005 Optical Society of America
Full Article | PDF ArticleMore Like This
Sushil Kumar, Benjamin S. Williams, Qi Qin, AlanW. M. Lee, Qing Hu, and John L. Reno
Opt. Express 15(1) 113-128 (2007)
M. Wienold, B. Röben, L. Schrottke, R. Sharma, A. Tahraoui, K. Biermann, and H. T. Grahn
Opt. Express 22(3) 3334-3348 (2014)
M. Wienold, A. Tahraoui, L. Schrottke, R. Sharma, X. Lü, K. Biermann, R. Hey, and H. T. Grahn
Opt. Express 20(10) 11207-11217 (2012)