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Opt Lett. 2006 Jun 15;31(12):1887-9.

Guiding light in optically induced ring lattices with a low-refractive-index core.

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Department of Physics and Astronomy, San Francisco State University, California 94132, USA.


We demonstrate a ring-shaped Bessel-like photonic lattice akin to a photonic bandgap fiber with a low-index core. While the ring lattice is optically induced in a bulk crystal with a self-defocusing nonlinearity, guidance of a probe beam propagating linearly through the core is clearly observed. The possible mechanism for such guidance is also discussed.


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