Hypersonic rugate filters based on porous silicon

L Thomas, Gazimagomed N Aliev, Paul A Snow

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Periodic solid state structures exhibit transmission stopbands for waves of certain frequencies. We demonstrate porous silicon based rugate filters with 40 dB rejection first-order stopbands for longitudinal acoustic waves at hypersonic frequencies and the predicted suppression of higher order bands.
Original languageEnglish
Article number173503
Number of pages3
JournalApplied Physics Letters
Issue number17
Early online date24 Oct 2010
Publication statusPublished - 25 Oct 2010


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