1x4 and 1x8 Photonic crystal ring resonator based Optical Splitters

In this paper, 2 dimensional (2-D) photonic crystal ring resonator based lx4 and lx8 optical power splitters have been designed and analysed. By using ring resonators and waveguides, the splitter is designed which has nearly equal power at each of the output ports. This equal output power at the output ports are obtained due to the symmetrical structure. Plane wave expansion method is used to calculate the Photonic Bandgap of the structure. FDTD method is used for design, simulation and analysation of the structure. The structure is designed using square lattice with $25\times 43$ rods in x-z direction and hence the structure is ultra-compact with an area of $313.2\mu m^{2}.$