Wang, QijiePflügl, ChristianDiehl, LCapasso, FedericoEdamura, TadatakaFuruta, ShinichiYamanishi, MasamichiKan, Hirofumi2009-12-212009Wang,Qi Jie, Christian Pflügl, Laurent Diehl, Federico Capasso, Tadataka Edamura, Shinichi Furuta, Masamichi Yamanishi, Hirofumi Kan. 2009. High performance quantum cascade lasers based on three-phononresonance design. Applied Physics Letters 94(1): 011103.0003-6951http://nrs.harvard.edu/urn-3:HUL.InstRepos:3445986A quantum cascade laser structure based on three-phonon-resonance design is proposed and demonstrated. Devices, emitting at a wavelength of 9 μm, processed into buried ridge waveguide structures with a 3 mm long, 16 μm wide cavity and a high-reflection (HR) coating have shown peak output powers of 1.2 W, slope efficiencies of 1 W/A, threshold current densities of 1.1 kA/cm2, and high wall-plug efficiency of 6% at 300 K. A 3 mm long, 12 μm wide buried-heterostructure device without a HR coating exhibited continuous wave output power of as high as 65 mW from a single facet at 300 K.en-USJournal Article2009-12-2110.1063/1.3062981