Optics and Photonics Society of Iran

In this work, a theoretical study of the temperature effect on two-dimensional solid/solid phononic crystal structure composed of square array of Epoxy rods embedded in Tungsten matrix with sub micrometer geometries have been done. Moreover, an ultrasonic wave switch based on two-dimensional phononic crystal is theoretically investigated. For this case, the possibility of tuning the position and width of phononic band structures in megahertz range has been observed utilizing the analyses of the band structure by finite element method. The numerical results for the case of periodic Tungsten/Epoxy structure with square lattice show that the frequency position and width of the absolute band gap strongly depends on the temperature and change prominently when the temperature change from 25°C to 35°C .The strong dependence on temperature and periodicity of designed phononic crystal prove that the structure could be suitable enough for thermal switching. So, according to the simulation results and calculations the design of an acoustic wave 1×2 switch for the specific frequency of f=1.48MHz at room temperature has been reported.