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Cerenkov-Type Second-Harmonic Generation in Two-Dimensional Nonlinear Photonic Structures

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8 Author(s)
Saltiel, S.M. ; Nonlinear Phys. Center & Laser Phys. Center, Australian Nat. Univ., Canberra, ACT, Australia ; Sheng, Yan ; Voloch-Bloch, Noa ; Neshev, D.N.
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We study the Cerenkov-type second-harmonic generation in several different two-dimensional nonlinear photonic structures formed in birefringent crystals with the 3 m symmetry. Depending on the degree of birefringence, we observe either single or double Cerenkov-like second-harmonic rings. We discuss the properties of these parametrically generated rings and show that their sixfold azimuthal modulation is associated with the hexagonal symmetry of the individual ferroelectric domains.

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Quantum Electronics, IEEE Journal of  (Volume:45 ,  Issue: 11 )