Efficient Terahertz Generation in Triply Resonant Nonlinear Photonic Crystal Microcavities

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.

8 pages, 3 figures

References in corpus (6)

• High Quality factor photonic crystal nanobeam cavities
• Optical-fiber based measurement of an ultra-small volume high-Q photonic crystal microcavity
• GaAs photonic crystal cavity with ultra-high Q: microwatt nonlinearity at 1.55 $\mu$m
• Ultra-high-Q TE/TM dual-polarized photonic crystal nanocavities
• Difference-frequency generation with quantum-limited efficiency in triply-resonant nonlinear cavities
• Broad-band spectral control of single photon sources using a nonlinear photonic crystal cavity

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• Degenerate four-wave mixing in triply-resonant Kerr cavities
• Multiply resonant high quality photonic crystal nanocavities
• Topology optimization of multi-track ring resonators and 2D microcavities for nonlinear frequency conversion
• Generation of Rabi frequency radiation using exciton-polaritons
• Nonlinear frequency conversion using high quality modes in GaAs nanobeam cavities
• Back action evading electro-optical transducer