Unified approach to Čerenkov second harmonic generation

We discuss the effect of second harmonic generation via the Čerenkov-like process in nonlinear bulk media and waveguides. We show that in both schemes the Čerenkov harmonic emission represents in fact a nonlinear Bragg diffraction process. It is therefore possible, for the first time, to describe th...

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Published inOptics express Vol. 21; no. 22; pp. 25715 - 25726
Main Authors Roppo, Vito, Kalinowski, Ksawery, Sheng, Yan, Krolikowski, Wieslaw, Cojocaru, Crina, Trull, Jose
Format Journal Article
LanguageEnglish
Published United States 04.11.2013
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Summary:We discuss the effect of second harmonic generation via the Čerenkov-like process in nonlinear bulk media and waveguides. We show that in both schemes the Čerenkov harmonic emission represents in fact a nonlinear Bragg diffraction process. It is therefore possible, for the first time, to describe the bulk and waveguide Čerenkov emission uniformly by considering the spatial modulation of the second-order nonlinear polarization. This is also experimentally illustrated by studying the Čerenkov second harmonic generation at the boundary of a nonlinear quadratic medium via the total internal reflection inside the nonlinear crystal.
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ISSN:1094-4087
1094-4087
DOI:10.1364/OE.21.025715