Staus C, Kuech T, McCaughan L
Continuously phase-matched terahertz difference frequency generation in an embedded-waveguide structure supporting only fundamental modes. [Journal Article, Research Support, U.S. Gov't, Non-P.H.S.]
Opt Express 2008 Aug 18; 16(17):13296-303.
We demonstrate an all-single mode structure which enables continuous phase matching of difference frequency generated THz light from the near-IR. This structure provides a long interaction length by way of well-confined collinear propagation of pumps and product without diffraction, resulting in high conversion efficiency. A LiNbO(3) version of this structure achieved a power-normalized conversion efficiency of 1.3 x 10(-7) W(-1)--some 23 times larger than the largest previously reported results.
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