Strong angular dependence of resonant states in 2D photonic molecules

Abstract: Photonic Molecules made of dielectric cylinders assembled as two-dimensional octagons and decagons have been studied. These structures exhibit resonance states that change their intensity depending on the incident radiation angle. While most part of spectra present small or even null variation, one of the resonances in both structures presents a high-sensibility to the incidence angle. This strong variation is well described in terms of the electric field intensity distribution of this resonant state, which is composed of maxima with alternate polarities inside each cylinder. Experimental measurements in the microwave range were taken from photonic molecules prototypes made of centimeter-scale glass cylinders ({\epsilon}=4.5). The excellent agreement between measurements and simulations as the incidence angle varies makes this system ideal to develop angle sensors.