Hypersonic acoustic mirrors and microcavities in porous silicon

Gazimagomed N Aliev, Bernhard Goller, Dmitry Kovalev, Paul A Snow

OAI: oai:purehost.bath.ac.uk:publications/58511cfe-4acb-4e3d-ad32-5758b5598c4e • DOI: https://doi.org/10.1063/1.3367747

Periodic solid state structures exhibit transmission stop bands for waves of certain frequencies. We report the realization and direct measurement of acoustic band gaps in porous silicon multilayer structures which exhibit similar to 50 dB stop bands for longitudinal acoustic waves in the gigahertz range. Furthermore, realization of an acoustic microcavity structure in porous silicon is demonstrated.

acoustic wave transmission Elemental semiconductors porous semiconductors optical multilayers integrated optics micro-optics microcavities silicon distributed Bragg reflectors