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NCUEIR > College of Science > Graduate Institute of Photonics Technologies > Periodical Articles > Item 987654321/1586

Please use this identifier to cite or link to this item: http://ir.ncue.edu.tw/ir/handle/987654321/1586

Title:	Octave Omnidirectional Band Gap in a Three-Dimensional Phononic Crystal
Authors:	Khelif A;Hsiao FL;Choujaa A;Benchabane S;Laude V
Contributors:	光電科技研究所
Date:	2010
Issue Date:	2010-11-10T07:40:31Z
Abstract:	We report on the experimental observation of a one-octave-large omnidirectional elastic band gap for longitudinal waves in a three-dimensional phononic crystal consisting of face-centered-cubic arrays of close-packed steel beads in a solid epoxy matrix. The 60% relative width of the band gap is larger than expected based on the contrast in material properties, and is confirmed by band structure diagram and transmission spectra computations. The coupling between shear and longitudinal polarizations is pointed out as a mechanism for enlarging the band gap by comparing with the steel beads in water matrix case.
Relation:	IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL Volume: 57 Issue: 7 Pages: 1621-1625
Appears in Collections:	[Graduate Institute of Photonics Technologies] Periodical Articles

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