Open AccessConcurrent optical parametric down-conversion in χ^(2) nonlinear photonic crystals
Author(s) -
L Chen,
Ping Xu,
Y. F. Bai,
X W Luo,
M. L. Zhong,
Ming Dai,
MingHui Lu,
Shining Zhu
Publication year - 2014
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.013164
Subject(s) - parametric statistics , spontaneous parametric down conversion , optics , optical parametric amplifier , lithium tantalate , degenerate energy levels , nonlinear optics , photonic crystal , quantum entanglement , beam (structure) , physics , materials science , lithium niobate , optical amplifier , laser , quantum , quantum mechanics , mathematics , statistics
We experimentally investigated concurrent parametric downconversion processes in a two-dimensional hexagonally poled lithium tantalate crystal. The substantial enhancement of parametric gain was observed when concurrent processes shared a common parametric beam. Both degenerate and nondegenerate concurrent parametric downconversion processes were studied. Analyses of the spatial forms and output angles showed a strong dependence on the working temperature, during which a well-defined beamlike parametric output was observed. Our results will stimulate the design for coherent high-gain generation of multiple parametric beams and also shed light on the compact engineering of path-entanglement with specific spatial forms based on concurrent spontaneous parametric downconversion processes.