Abstract
We demonstrate experimentally a transition from nonlinear beam trapping to defocusing in a two-dimensional periodic photonic structures by varying the modulation depth of the lattice. The observed effect illustrates the fundamental crossover from discrete to cw transport mechanisms. At the threshold modulation, the output beam is highly sensitive to refractive index and power variations, which can be potentially applied for high-sensitivity refractive index or temperature sensing.
© 2010 Optical Society of America
Full Article | PDF ArticleMore Like This
Michal Matuszewski, Christian R. Rosberg, Dragomir N. Neshev, Andrey A. Sukhorukov, Arnan Mitchell, Marek Trippenbach, Michael W. Austin, Wieslaw Krolikowski, and Yuri S. Kivshar
Opt. Express 14(1) 254-259 (2006)
Kristian Motzek, Andrey A. Sukhorukov, and Yuri S. Kivshar
Opt. Express 14(21) 9873-9878 (2006)
Can Sun, Dmitry V. Dylov, and Jason W. Fleischer
Opt. Lett. 34(19) 3003-3005 (2009)