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    High quality broadband spatial reflections of slow Rayleigh surface acoustic waves modulated by a graded grooved surface

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    Type
    Article
    Authors
    Xu, Yanlong cc
    Peng, Pai
    KAUST Department
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Date
    2015-01-21
    Permanent link to this record
    http://hdl.handle.net/10754/346728
    
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    Abstract
    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 Physics
    Publisher
    AIP Publishing
    Journal
    Journal of Applied Physics
    DOI
    10.1063/1.4905948
    Additional Links
    http://scitation.aip.org/content/aip/journal/jap/117/3/10.1063/1.4905948
    ae974a485f413a2113503eed53cd6c53
    10.1063/1.4905948
    Scopus Count
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    Articles; Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division

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