Hypersonic phonon propagation in one-dimensional surface phononic crystal

Bartlomiej Graczykowski, Marianna Sledzinska, Nikolaos Kehagias, Francesc Alzina, Juan Sebastian Reparaz, Clivia M. Sotomayor Torres

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    Resum

    Hypersonic, thermally activated surface acoustic waves propagating in the surface of crystalline silicon patterned with periodic stripes were studied by Brillouin light scattering. Two characteristic directions (normal and parallel to the stripes) of surface acoustic waves propagation were examined exhibiting a distinctive propagation behavior. The measured phononic band structure exhibits diverse features, such as zone folding, band gap opening, and hybridization to local resonance for waves propagating normal to the stripes, and a variety of dispersive modes propagating along the stripes. Experimental results were supported by theoretical calculations performed using finite element method.
    Idioma originalAnglès
    RevistaApplied Physics Letters
    Volum104
    Número12
    DOIs
    Estat de la publicacióPublicada - 2014

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