Hypersonic acoustic mirrors and microcavities in porous silicon

Aliev, G. N.; Goller, B.; Kovalev, D.; Snow, P. A.
March 2010
Applied Physics Letters;3/22/2010, Vol. 96 Issue 12, p124101
Academic Journal
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.


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