Optical tornadoes in photonic crystals

Details Optical tornadoes in photonic crystals Optical tornadoes in photonic crystals

2008-10-07

arxiv.org/abs/0810.1101v1

Physics

Condensed Matter

Other Condensed Matter

REVTeX, 5 pages, 5 figures

Scientific paper

Based on an optical analogy of spintronics, the generation of optical tornadoes is theoretically investigated in two-dimensional photonic crystals without space-inversion symmetry. We address its close relation to the Berry curvature in crystal momentum space, which represents the non-trivial geometric property of a Bloch state. It is shown that the Berry curvature is easily controlled by tuning two types of dielectric rods in a honeycomb photonic crystal. Then, Bloch states with large Berry curvatures appear as optical tornadoes in real space. The radiation force of such a configuration is analyzed, and its possible application is also discussed.

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