Hypersonic acoustic mirrors and microcavities in porous silicon

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 ∼ 50   dB stop bands for longitudinal acoustic waves in the gigahertz range....

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Bibliographic Details
Published in:Applied physics letters 2010-03, Vol.96 (12), p.124101-124101-3
Main Authors: Aliev, G. N., Goller, B., Kovalev, D., Snow, P. A.
Format: Article
Language:English
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Summary: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 ∼ 50   dB stop bands for longitudinal acoustic waves in the gigahertz range. Furthermore, realization of an acoustic microcavity structure in porous silicon is demonstrated.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3367747