Apparatus, systems, and methods of acoustic energy confinement with phononic crystals
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United States of America Patent
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Sep 25, 2018
Grant Date -
Jan 11, 2018
app pub date -
Sep 5, 2017
filing date -
Dec 15, 2015
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Abstract
An acoustic resonator includes a wafer and a first phononic crystal disposed on the wafer to define an acoustic waveguide so as to propagate an acoustic wave along a propagation direction. The first phononic crystal includes a first two-dimensional (2D) array of metal stripes having a first period on the propagation direction. The apparatus also includes a second phononic crystal and a third phononic crystal disposed on two sides of the first phononic crystal and having a different period from the first period. The second phononic crystal and the wafer define a first reflector to reflect the acoustic wave. The third phononic crystal and the wafer define a second reflector to reflect the acoustic wave.
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