Observation of light localization in modulated Bessel optical lattices.
We generate higher-order azimuthally modulated Bessel optical lattices in photorefractive crystals by employing a phase-imprinting technique. We report on the experimental observation of self-trapping and nonlinear localization of light in such segmented lattices in the form of ring-shaped and single-site states. The experimental results agree well with numerical simulations accounting for an anisotropic and spatially nonlocal nonlinear response of photorefractive crystals.
Fischer
Robert
R
Neshev
Dragomir N
DN
Lopez-Aguayo
Servando
S
Desyatnikov
Anton S
AS
Sukhorukov
Andrey A
AA
Krolikowski
Wieslaw
W
Kivshar
Yuri S
YS