Sheng, Yan Multi-directional Čerenkov second harmonic generation in two-dimensional nonlinear photonic crystal. [electronic resource] - Optics express Feb 2012 - 3948-53 p. digital Publication Type: Journal Article; Research Support, Non-U.S. Gov't ISSN: 1094-4087 Standard No.: 10.1364/OE.20.003948 doi