This article presents the techniques of determination of suitable material to control of light such as generating slow, fast pulse using nano ring resonator. Nano ring resonator (NRR) systems made of different materials. Nano ring device can be constructed with radius in the size of a nano meter. The concepts behind optical ring resonators are the same as those behind whispering galleries except that they use light and obey the properties behind constructive interference and total internal reflection. In this research, ring resonators are made of InGaAsP/InP, GaAlAs/GaAs and hydrogenated amorphous silicon (a-Si:H) materials.
