Refraction-type sonic crystal junction diode

Ahmet Cicek; Olgun Adem Kaya; Bulent Ulug

doi:10.1063/1.3694020

Refraction-type sonic crystal junction diode

Ahmet Cicek, Olgun Adem Kaya, Bulent Ulug

Research output: Contribution to journal › Article › peer-review

64 Citations (Scopus)

Abstract

Unidirectional sound transmission across a junction of two square sonic crystals with different orientations and lattice constants is numerically investigated. Re-scaling and rotating the wave vectors through refractions across the air-first sonic crystal interface and the junction, respectively, facilitate coupling into the spatial modes of the second crystal. Unidirectional transmission, demonstrated through finite element method simulations, is accomplished between 10.4 kHz and 12.8 kHz. Transmission values to the right and left are greater than 60% and less than 1.0%, respectively, between 11.0 kHz and 12.4 kHz, resulting in a contrast ratio greater than 0.9.

Original language	English
Article number	111905
Journal	Applied Physics Letters
Volume	100
Issue number	11
DOIs	https://doi.org/10.1063/1.3694020
Publication status	Published - 12 Mar 2012
Externally published	Yes

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AB - Unidirectional sound transmission across a junction of two square sonic crystals with different orientations and lattice constants is numerically investigated. Re-scaling and rotating the wave vectors through refractions across the air-first sonic crystal interface and the junction, respectively, facilitate coupling into the spatial modes of the second crystal. Unidirectional transmission, demonstrated through finite element method simulations, is accomplished between 10.4 kHz and 12.8 kHz. Transmission values to the right and left are greater than 60% and less than 1.0%, respectively, between 11.0 kHz and 12.4 kHz, resulting in a contrast ratio greater than 0.9.

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Refraction-type sonic crystal junction diode

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