Abstract
Photonic-crystal lasers operating on -point band-edge states of a photonic structure naturally exploit the so-called “nonradiative” modes. As the surface output coupling efficiency of these modes is low, they have relatively high factors, which favor lasing. We propose a new 2D photonic-crystal design that is capable of reversing this mode competition and achieving lasing on the radiative modes instead. Previously, this has only been shown in 1D structures, where the central idea is to introduce anisotropy into the system, both at unit-cell and resonator scales. By applying this concept to 2D photonic-crystal patterned terahertz frequency quantum cascade lasers, surface-emitting devices with diffraction-limited beams are demonstrated, with 17 mW peak output power.
© 2014 Optical Society of America
Full Article | PDF ArticleMore Like This
Gangyi Xu, Raffaele Colombelli, Remy Braive, Gregoire Beaudoin, Luc Le Gratiet, Anne Talneau, Laurence Ferlazzo, and Isabelle Sagnes
Opt. Express 18(11) 11979-11989 (2010)
Song-Liang Chua, Ling Lu, Jorge Bravo-Abad, John D. Joannopoulos, and Marin Soljačić
Opt. Lett. 39(7) 2072-2075 (2014)
Gangyi Xu, Yannick Chassagneux, Raffaele Colombelli, G. Beaudoin, and I. Sagnes
Opt. Lett. 35(6) 859-861 (2010)