Light-sensitive reaction-diffusion waves in a checkerboard-like illumination system.

We will report about a set-up to experimentally investigate the propagation behavior of excitation ~waves traveling through an inhomogeneously illuminated reaction-diffusion medium, including preliminary results.~Schebesch and Engel (I. Schebesch and H. Engel, \textit{Wave propagation in heterogeneous excitable media}, Phys. Rev. E, \textbf{57}(4), 3905--3910, 1998) calculated numerically the propagation behavior of light-sensitive excitation waves in a pure checkerboard-like illuminated system. We are using the model system of excitable media, the chemical~Belousov-Zhabotinsky (BZ) reaction, to verify their one-dimensional and two-dimensional results.~