Monochannel Demultiplexer Phononic Crystal Slab Based on Hollow Pillars

A mono-channel waveguide with alternate hollow pillars of different radius to passively select and reject particular frequencies for filtering applications are numerically simulated based on the Finite Element Method (FEM). The waves guided while can be filtered according pillar inner as its waveguiding mechanism. computations dispersion relation, transmission coefficient stress displacement profile waveguides were carried out understand propagation behaviour elastic structure. proposed model shows a complete bandgap around 700 kHz, respective blocking phenomenon is demonstrated using square-ring shapes. introduction defect lines in linear L-Shaped form enables tailorable frequency shift within region optimized pillar. eliminates need multi-channel system conventional several separated thus reduces dimension device.