Generation of second-harmonic conical waves via nonlinear Bragg diffraction
We report on the observation of second-harmonic conical waves generated in a novel geometry of the transverse excitation of an annular periodically poled nonlinear photonic structure by a fundamental Gaussian beam. We show that the conical beams are formed as a result of the higher-order nonlinear Bragg diffraction involving two parametric processes in which an ordinary fundamental wave is converted simultaneously into ordinary and extraordinary polarized second harmonics.
|Collections||ANU Research Publications|
|Source:||Physical Review Letters|
|Saltiel_Generation2008.pdf||372.67 kB||Adobe PDF|
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