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7 March 2014 Nonlinear optical resonators for tunable THz emission
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We designed and theoretically investigated nonlinear optical micro-ring resonators for tunable terahertz (THz) emission in 1-10 THz range by using difference frequency generation (DFG) phenomenon with large second order optical nonlinearity (χ(2)). Our design consists of a nonlinear ring resonator and another ring underneath capable of sustaining high-Q resonant modes for infrared pump beams and the generated THz radiation, respectively. The nonlinear ring resonator generates THz through DFG by mixing the input waves carried by a pair of waveguides. The proposed device can be a viable platform for tunable, compact THz emitters and on-chip integrated spectrometers.
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Raju Sinha, Mustafa Karabiyik, Chowdhury Al-Amin, Phani K. Vabbina, and Nezih Pala "Nonlinear optical resonators for tunable THz emission", Proc. SPIE 8985, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications VII, 898505 (7 March 2014);

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