Method for carrying out vibration mode selection on photonic crystal resonator

The invention provides a method for carrying out vibration mode selection to a photonic crystal resonator. The method comprises the following steps: carrying out modal analysis on a piezoelectric material in finite element software, replacing top and bottom electrodes with short circuit boundary conditions to obtain surface charge distribution of a target mode; respectively counting the integrals of positive and negative surface charges and taking the integral with a larger absolute value as electrode arrangement region; and transferring the electrode arrangement region and leads into a photonic crystal structure of which the surface is sputtered with the piezoelectric material and connecting and fixing the electrode arrangement region and the leads to peripheral circuits. Compared with the traditional IDT exciting method, the method for carrying out vibration mode selection to the photonic crystal resonator has the advantages of reducing the insertion loss of the resonator, enhancing the response of the mode, and increasing the degree of freedom of mode selection; in addition, the method has relatively wide application range and also can be applied to other resonator structures based on piezoelectric transducing and having complicated modes of vibration and application backgrounds except temperature compensation.