Journal
APPLIED PHYSICS LETTERS
Volume 98, Issue 17, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3583982
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- ANR [ANR-09-NANO-004, P3N2009]
- European Commission [233883]
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We observe experimentally the propagation of surface-guided waves in a hypersonic phononic crystal, both in the radiative and nonradiative regions of the spectrum. Combining electrical measurements in reflection and transmission as well as optical maps of the surface displacement, a band gap extending from 0.6 to 0.95 GHz is identified in a square lattice array of 1 mu m radius air holes milled in lithium niobate. The optical measurements reveal the transmission of surface-guided waves above the band gap, well inside the sound cone. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3583982]
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