期刊
OPTICS EXPRESS
卷 17, 期 22, 页码 20099-20108出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.17.020099
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资金
- NSERC (Canada)
- NSEC at Harvard
- Army Research Office through the ISN [W911NF-07-D-0004]
- US DOE [DE-FG02-97ER25308]
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. We show that the output power at the point of optimal total conversion efficiency is adjustable by varying the mode quality (Q) factors. (C) 2009 Optical Society of America
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