High quality broadband spatial reflections of slow Rayleigh surface acoustic waves modulated by a graded grooved surface
Type
ArticleAuthors
Xu, Yanlong
Peng, Pai
Date
2015-01-21Permanent link to this record
http://hdl.handle.net/10754/346728
Metadata
Show full item recordAbstract
We report high quality broadband spatial reflections of Rayleigh surface acoustic waves (SAWs) through a graded grooved surface. High quality means that no wave is allowed to transmit and the incident wave is nearly all reflected to the input side. The graded grooved surface is structured by drilling one dimensional array of graded grooves with increased depths on a flat surface. We investigate SAW dispersion relations, wave field distribution at several typical SAW wavelengths, and time evolution of a Gaussian pulse through the graded grooved surface. Results show that the input broadband Rayleigh SAWs can be slowed, spatially enhanced and stopped, and finally reflected to the input side. The study suggests that engraving the flat surface can be used as an efficient and economical way to manipulate Rayleigh SAWs, which has potential application in novel SAW devices such as filters, reflectors, sensors, energy harvesters, and diodes.Citation
High quality broadband spatial reflections of slow Rayleigh surface acoustic waves modulated by a graded grooved surface 2015, 117 (3):035103 Journal of Applied PhysicsPublisher
AIP PublishingJournal
Journal of Applied Physicsae974a485f413a2113503eed53cd6c53
10.1063/1.4905948