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

Yan Sheng | Zendy; V. Roppo | Zendy; Ksawery Kalinowski | Zendy; Wiesław Królikowski | Zendy

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

Author(s) -

Yan Sheng,

V. Roppo,

Ksawery Kalinowski,

Wiesław Królikowski

Publication year - 2012

Publication title -

optics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.524

H-Index - 272

eISSN - 1071-2763

pISSN - 0146-9592

DOI - 10.1364/ol.37.003864

Subject(s) - optics , physics , modulation (music) , nonlinear optics , nonlinear system , self phase modulation , second harmonic generation , phase modulation , cross phase modulation , nonlinear medium , high harmonic generation , harmonic , laser , phase noise , acoustics , quantum mechanics

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 approach utilizing the concept of reciprocal vectors representing the Fourier spectrum of the modulation of χ((2)).

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