Observation of surface-guided waves in holey hypersonic phononic crystal

descriptionPublicationkeyboard_double_arrow_right Article 25 Apr 2011 France English Publisher:AIP PublishingJournal:Applied Physics Letters, volume 98 (issn: 0003-6951, eissn: 1077-3118,

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Authors: Benchabane, Sarah; Gaiffe, Olivier; Ulliac, Gwenn; Salut, Roland; Achaoui, Younes; Laude, Vincent;

doi: 10.1063/1.3583982

Observation of surface-guided waves in holey hypersonic phononic crystal

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Abstract

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 μm 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.

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Keywords

[SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], [PHYS.PHYS.PHYS-OPTICS] Physics [physics]/Physics [physics]/Optics [physics.optics], [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], [SPI.ACOU] Engineering Sciences [physics]/Acoustics [physics.class-ph], [SPI.NANO] Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, Phonons in crystal lattices, 500, surface acoustic waves, acoustic wave transmission, Other inorganic compounds, 530, lithium compounds, [PHYS.MECA.ACOU]Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph], energy gap, acoustic wave propagation, Acoustical properties, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, phononic crystals, [PHYS.MECA.ACOU] Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph]

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