Frequency band-gap measurement of two-dimensional air/silicon phononic crystals using layered slanted finger interdigital transducers

By Tsung-Tsong Wu, Liangliang Wu, Zi-Gui Huang. 2005

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Microfabricated phononic crystal devices and applications (2008, methodology): “Nearly all reported theoretical and physical designs of phononic crystals formed by air inclusions in a solid matrix require large filling fractions to open a complete bandgap [8, 12, 26, 27, 33], resulting in features that are difficult to fabricate repeatedly, especially at high frequencies [33].”
Tailoring Structure‐Borne Sound through Bandgap Engineering in Phononic Crystals and Metamaterials: A Comprehensive Review (2022, methodology): “[91] initiated this micro-integration by fabricating a PnC at the microscale made of a square lattice of holes in a silicon substrate.”