One-way phonon isolation in acoustic waveguides

We present a method to achieve one-way phonon isolation in acoustic waveguides by considering spatio-temporal modulation of material properties. One-way conversion between symmetric and antisymmetric shear horizontal modes of an unbounded plate acoustic waveguide is numerically demonstrated using th...

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Bibliographic Details
Published in:Applied physics letters 2014-02, Vol.104 (8)
Main Authors: Zanjani, Mehdi B., Davoyan, Arthur R., Mahmoud, Ahmed M., Engheta, Nader, Lukes, Jennifer R.
Format: Article
Language:English
Subjects:
Acoustic properties
Acoustic waveguides
Acoustics
Applied physics
Conversion
Material properties
Microelectromechanical systems
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Summary:We present a method to achieve one-way phonon isolation in acoustic waveguides by considering spatio-temporal modulation of material properties. One-way conversion between symmetric and antisymmetric shear horizontal modes of an unbounded plate acoustic waveguide is numerically demonstrated using this method. Analytical and numerical evidence for the possibility of mode conversion is presented. Possible experimental implementation and applications for on-chip signal isolation in MEMS devices are also suggested.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4866590