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- Title
Phononic Coupled-Resonator Waveguide Micro-Cavities.
- Authors
Wang, Ting-Ting; Bargiel, Sylwester; Lardet-Vieudrin, Franck; Wang, Yan-Feng; Wang, Yue-Sheng; Laude, Vincent
- Abstract
Featured Application: Engineered phononic resonances in the ultrasonic range. Phononic coupled-resonator waveguide cavities are formed by a finite chain of defects in a complete bandgap phononic crystal slab. The sample is machined in a fused silica plate by femtosecond printing to form an array of cross-shape holes. The collective resonance of the phononic cavities, in the Megahertz frequency range, are excited by a piezoelectric vibrator and imaged by laser Doppler vibrometry. It is found that well-defined resonant cavity modes can be efficiently excited, even though the phononic cavities are distant by a few lattice spacings and are only weakly coupled through evanescent elastic waves. The results suggest the possibility of engineering the dynamical response of a set of coupled phononic cavities by an adequate layout of defects in a phononic crystal slab.
- Subjects
PHONONIC crystals; ELASTIC waves; FUSED silica; CRYSTAL defects; WAVEGUIDES; RESONANCE
- Publication
Applied Sciences (2076-3417), 2020, Vol 10, Issue 19, p6751
- ISSN
2076-3417
- Publication type
Article
- DOI
10.3390/app10196751