Numerical simulation of one dimensional (1D) photonic crystal multiple cavities based on silicon on insulator (SOI)

We have theoretically demonstrated the variation of geometrical parameters for the cavities design of one dimensional (1D) photonic crystal nanocavity based on silicon on insulator (SOI) waveguides. To evaluate the cavity numerically, we have successfully computed it using the 2D finite difference time domain (FDTD) approach. We have varied the geometrical hole size, lattice and number of cavity. We have also varied the length of the cavity parameter, from 530 to 675 nm and for lattice constant from 345 to 410 nm. The optimized quality factors of approximately 4300 at 1617.9 nm resonance wavelengths were obtained and the free spectral range (FSR) was calculated to be in the range of 10 to 60 nm.