A. Minovich, D. N. Neshev, A. Dreischuh, W. Krolikowski, and Yu. S. Kivshar
Abstract.
We study experimentally and theoretically the nonlocal response of a medium with thermal nonlinearity and show that despite its inherently infinite range it can be accurately characterized by a well-defined nonlocal response function. We retrieve the shape of this function and analyze its transformation with the change of boundaries.