The characteristics of the photonic crystals resonant cavity with temperature and force simultaneously changing

A model of two-dimensional photonic band gap (PBG) structures resonant cavity made by GaAs pillars in air with graphite lattice is proposed. Its TE and TM mode resonant wavelength simultaneously changing with temperature and force is calculated by finite-difference time-domain (FDTD) method. The results show that the wavelength of the resonant cavity simultaneously changed with temperature and force according to an approximately segmental linear relation, and the highest response sensitivity for this kind resonant cavity is 5.8 nm/°C MPa; Moreover, there is a switch character for this kind of resonant cavity, and the primary explanation for this character was given by the calculation result.