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    • Surface-Emitting THz Sources Based on Difference-Frequency Generation in Mid-Infrared Quantum Cascade Lasers 

      Geiser, Markus; Pfluegl, Christian J.; Belyanin, A; Wang, Qi Jie; Yu, Nanfang; Belkin, M. A.; Edamura, T; Kan, H; Fischer, M; Wittmann, A; Faist, J; Capasso, Federico (Society of Photo-optical Instrumentation Engineers, 2010)
      We report a surface-emitting THz source based on intracavity difference-frequency generation in dual-wavelength midinfrared quantum cascade lasers with integrated giant second-order nonlinear susceptibility. The THz light ...