Multi-directional Čerenkov second harmonic generation in two-dimensional nonlinear photonic crystal

Opt Express. 2012 Feb 13;20(4):3948-53. doi: 10.1364/OE.20.003948.

Abstract

We study Čerenkov-type second-harmonic generation in a two-dimensional quasi-periodically poled LiNbO3 crystal. We employ a new geometry of interaction to observe simultaneous emission of multi-directional nonlinear Čerenkov radiation with comparable intensities. This opens a way to control the angle of Čerenkov emission by tailoring the nonlinearity of the material, which is otherwise intrinsically defined by dielectric constants of the medium and their dispersion.

Publication types

  • Research Support, Non-U.S. Gov't