Abstract

We present unit-cell designs for 2D phononic crystals formed by solid-solid materials with large phononic band gaps for (1) out-of-plane, (2) in-plane, and (3) combined out- and in-plane elastic waves propagation. It has been found phononic crystal structures based on the Voronoi diagram are able to achieve phononic gaps for the three categories. The flexibility that the gaps locating at the appointed band orders allows the design of functional devices at desired frequency regions.

© 2017 Optical Society of America

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