Guiding light in optically induced ring lattices with a low-refractive-index core.
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.
Wang
Xiaosheng
X
Department of Physics and Astronomy, San Francisco State University, California 94132, USA.
Chen
Zhigang
Z
Yang
Jianke
J