Mastered dispersion of material resonators: Broad corrugated waveguides working under the Littrow regime

Henri Benisty 1 Nikolay Piskunov 1
1 Laboratoire Charles Fabry / Naphel
LCF - Laboratoire Charles Fabry
Abstract : An anomalous dispersion for modes of a material resonator is highly desired to form frequency combs. A resonator free-spectral-range (FSR) controlled by shape so as to increase with frequency x/2p compensates the normal index dispersion @n/@x>0, producing evenly spaced resonances. Only special shapes achieve this scope. We show here that broad periodic corrugated waveguides working at Littrow regime feature such an increasing trend @FSR/@x>0. We outline experimentally this trend on silicon-on-insulator devices designed for 45 Littrow operation. We predict dispersion-free silicon-based designs across the 1.4–4.0 lm mid-infrared range.
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Applied Physics Letters, American Institute of Physics, 2013, 102, pp.151107. 〈10.1063/1.4802253〉
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Henri Benisty, Nikolay Piskunov. Mastered dispersion of material resonators: Broad corrugated waveguides working under the Littrow regime. Applied Physics Letters, American Institute of Physics, 2013, 102, pp.151107. 〈10.1063/1.4802253〉. 〈hal-00857663〉

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