Scherer, Yariv et al. create room temperature cw laser tunable by varrying photonic crysta lattice contant

Lin Zhu, Xiankai Sun, Guy A. DeRose, Axel Scherer, and Amnon Yariv (2008) Room temperature continuous wave operation of single-mode, edge-emitting photonic crystal Bragg lasers. Optics Express, 16(2):502-506, 21 January 2008. CaltechAUTHORS