Hypersonic acoustic mirrors and microcavities in porous silicon
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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.
|Creators||Aliev, G. N., Goller, B., Kovalev, D. and Snow, P. A.|
|Uncontrolled Keywords||acoustic wave transmission, elemental semiconductors, porous semiconductors, optical multilayers, integrated optics, micro-optics, microcavities, silicon, distributed bragg reflectors|
|Departments||Faculty of Science > Physics|
|Research Centres||Centre for Photonics and Photonic Materials|
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