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

Introduce
dott. Francesco Banfi
Università Cattolica del Sacro Cuore

Interviene
Prof. Dr. OLIVER WRIGHT
Division of Applied Physics, Hokkaido University, Sapporo, Japan

Abstract
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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