Trapping and guiding of acoustic waves by defect modes in a full-band-gap ultrasonic crystal

By A. Khelif, A. Choujaa, Bahram Djafari-Rouhani, M. Wilm, S. Ballandras, V. Laude. 2003

291 citations recorded by the source corpus.

We report on the experimental observation of the existence and the interaction of localized defect modes in a full acoustic band gap in a two-dimensional lattice of steel cylinders immersed in water. The confinement of defect modes and the splitting of their resonance frequencies are observed and are explained by their evanescent coupling. A different type of waveguiding in a phononic crystal based on the evanescent coupling of defect modes is proposed and demonstrated experimentally. The finite-difference time-domain method is used to interpret the experimental data and it is found that theoretical predictions properly account for the observed spectra.

Subfields: Biomedical Engineering, Mechanics of Materials, Oceanography

View Paper: https://www.semanticscholar.org/paper/20e60be41e02f1f30534d9c1e4ae2914e80cdc3e

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In Biomedical Engineering

1. Ihab El-Kady
2. Roy H. Olsson III
3. Eleftherios N. Economou
4. W. Steurer
5. Maria Kafesaki
6. T. Miyashita

In Oceanography

1. Ihab El-Kady
2. Roy H. Olsson III

Citations in the corpus

• Microfabricated phononic crystal devices and applications (2008, background): “Both series [15, 16] and drop [17] cavities and filters have”
• Classical vibrational modes in phononic lattices: theory and experiment (2005, background): “5 mm diameter, 150 mm length) in water [209].”