Optical Add/Drop Filter and Pressure Sensor Design Using Two-Dimensional Photonic Crystal

An optical add/drop filter (ADF) and pressure sensor using 2-dimensional photonic crystal (2DPC) is proposed in this paper. The designed 13µm×10.6µm PC has a square array of circular Silicon rods in an air background having an index of refraction of 3.5. A square ring resonator is sandwiched between the Bus and Drop waveguide. A dropping efficiency of 93.81% is achieved at an operating wavelength of 1554 nm. Finally, the performance of the device is considered for pressure sensor application. Simulation results show that the resonant wavelength shifts at higher wavelengths on increasing pressure in a linear manner.