Continuously phase-matched terahertz difference frequency generation in an embedded-waveguide structure supporting only fundamental modes.
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.
Staus
Chad
C
Department of Electrical and Computer Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA.
Kuech
Thomas
T
McCaughan
Leon
L
D007259:Infrared Rays; D008872:Microwaves; D009556:Niobium / Q000737:chemistry*; D055095:Optics and Photonics / Q000295:instrumentation*; D010087:Oxides / Q000737:chemistry*; D012031:Refractometry / Q000295:instrumentation*; D014159:Transducers
D010087:Oxides; D009556:Niobium; C091692:lithium niobate