Ultra Wide Acoustic Bandgap Detection in Novel Octagonal Phononic Crystal of MEMS Materials

We design a 4EO-PnC (4 sides extended octagonal shape phononic crystal) of MEMS (Microelectromechanical system) materials to control the acoustic waves in MEMS devices such as resonators and biosensors. An ultra-wide acoustic bandgap is detected in one-dimensional(1D) (BG ratio 121.8% to 135.84%), and two-dimensional (2D) (BG ratio 116.04% to 130.71%) ‘in-plane mode’ of MEMS materials through FEA (Finite Element Analysis) method. We analyze that the bandgap of 4EO- diamond PnC is the extremist one. The bandgap of one dimensional (1D) and two-dimensional (2D) ‘out-of-plane’ mode for 4EO- diamond PnC are also explore. Additionally, for the declaration of wide bandgap in 4EO-PnC it is observed that very wide peak attenuation is successfully lie in the same frequency region where the band gaps are detected.