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arXiv · 0908.0463

Efficient Terahertz Generation in Triply Resonant Nonlinear Photonic Crystal Microcavities

Ian B. Burgess·Yinan Zhang·Murray W. McCutcheon·Alejandro W. Rodriguez·Jorge Bravo-Abad·Steven G. Johnson·Marko Loncar
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Abstract

We propose a scheme for efficient cavity-enhanced nonlinear THz generation via difference-frequency generation (DFG) processes using a triply resonant system based on photonic crystal cavities. We show that high nonlinear overlap can be achieved by coupling a THz cavity to a doubly-resonant, dual-polarization near-infrared (e.g. telecom band) photonic-crystal nanobeam cavity, allowing the mixing of three mutually orthogonal fundamental cavity modes through a chi(2) nonlinearity. We demonstrate through coupled-mode theory that complete depletion of the pump frequency - i.e., quantum-limited conversion - is possible in an experimentally feasible geometry, with the operating output power at the point of optimal total conversion efficiency adjustable by varying the mode quality (Q) factors.

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Ian B. Burgess, Yinan Zhang, Murray W. McCutcheon, Alejandro W. Rodriguez, Jorge Bravo-Abad, Steven G. Johnson, Marko Loncar. 2009-08-04. Efficient Terahertz Generation in Triply Resonant Nonlinear Photonic Crystal Microcavities. https://doi.org/10.1364/oe.17.020099

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