Measurement of azimuthal dependence of resonant coupling in 2D photonic crystals

To probe a performance of the photonic structures, the optical response of the photonic crystal in radiative region above light line was determined, and the structure of leaky modes for both polarization planes TE, TM at several incident angles was mapped. Leaky modes structure was approved by numerical RCWA-based modelling. The measured azimuthal dependences were evaluated to obtain equi-frequency curves.