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Role of a localized modulation of χ⁽²⁾ in Čerenkov second-harmonic generation in nonlinear bulk medium

Sheng, Yan; Roppo, Vito; Kalinowski, Ksawery; Krolikowski, Wieslaw


We study the second-harmonic generation in quadratic nonlinear media with localized spatial modulation of χ⁽²⁾ response. We demonstrate that the emission of Čerenkov second-harmonic takes place only when the fundamental beam illuminates the region of χ⁽²⁾ variation. This proves that the sharp modulation of the χ⁽²⁾ nonlinearity constitutes a sufficient condition for the emission of Čerenkov second harmonic in bulk materials. Our calculations are in excellent agreement with simple analytical...[Show more]

CollectionsANU Research Publications
Date published: 2012
Type: Journal article
Source: Optics Letters
DOI: 10.1364/OL.37.003864


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