Università Cattolica del Sacro Cuore

Watching waves confined in phononic cavities

Seminario  11 aprile 2016
Aula: Sala Riunioni -  Ore: 12.00
Via Musei 41, Brescia

Watching waves confined in phononic cavities

dott. Francesco Banfi
Università Cattolica del Sacro Cuore

Division of Applied Physics, Hokkaido University, Sapporo, Japan

Surface-acoustic and bulk-acoustic-wave wave devices based on waves in resonators have found extensive application in high-frequency signal processing. In particular phononic crystals, metamaterials and micron to sub-micron structures exhibit interesting physical properties, such as omnidirectional stop bands or tight wave confinement, that allow potential improvements to these devices. Here we present results of real-time imaging and tracking of optically-induced vibrations at frequencies from 10 MHz up to ~100 GHz in various novel micron-scale cavity geometries: phononic-crystal slab cavity structures, metamaterial extraordinary-transmission structures, sub-micron fibers and planar circular structures.

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