Effective Second Order Susceptibility in Photonic Crystals Composed from Centro-Symmetric Materials

Details Effective Second Order Susceptibility in Photonic Crystals Composed from Centro-Symmetric Materials Effective Second Order Susceptibility in Photonic Crystals Composed from Centro-Symmetric Materials

2001-07-31

arxiv.org/abs/physics/0107080v1

Physics

Optics

5 pages, 3 figures

Scientific paper

10.1103/PhysRevB.65.073105

A technique for obtaining efficient bulk second order susceptibility in non centro-symmetric Photonic Crystals (PC) made from centro-symmetric materials is discussed. The effect is based on the electric quadrupole effect, strong electromagnetic mode deformation and non homogeneous contribution to volume polarization from different parts of the PC. The required symmetry breaking is introduced on the macroscale of the PC unit cell. The obtained structural chi_str^(2) is comparable with the second order susceptibility of ordinary non-linear materials. Phase matching can be achieved by introducing symmetry modulation (Quasi Phase Matching) during fabrication of the PC.

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