Open AccessSpontaneous parametric down conversion in a nanophotonic waveguide
Author(s) -
S. M. Spillane,
Marco Fiorentino,
Raymond G. Beausoleil
Publication year - 2007
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.15.008770
Subject(s) - optics , nanophotonics , spontaneous parametric down conversion , parametric statistics , waveguide , physics , quantum optics , nonlinear optics , coupled mode theory , materials science , refractive index , optoelectronics , laser , statistics , mathematics , quantum mechanics , quantum entanglement , quantum
Recently, we verified that spontaneous parametric down conversion (SPDC) is enhanced in a waveguide, in agreement with theory showing an inverse dependence on mode confinement [1]. Here we investigate highly-confined nanophotonic waveguides designed to maximize the SPDC rate. A theory modified to include highly-confined waveguides is used to calculate the spectral width and pair generation rates in a sample system. Pair generation rates exceeding 10(9)/sec/nm/mW are predicted for periodically-poled KTP (PPKTP) nanophotonic waveguides. This results in an enhancement of the downconverted signal power greater than 45x that of low-index-contrast PPKTP waveguides and greater than 6500x that of bulk PPKTP crystals.