Double Dirac cones in phononic crystals

Handle URI:
http://hdl.handle.net/10754/346724
Title:
Double Dirac cones in phononic crystals
Authors:
Li, Yan; Wu, Ying ( 0000-0002-7919-1107 ) ; Mei, Jun
Abstract:
A double Dirac cone is realized at the center of the Brillouin zone of a two-dimensional phononic crystal (PC) consisting of a triangular array of core-shell-structure cylinders in water. The double Dirac cone is induced by the accidental degeneracy of two double-degenerate Bloch states. Using a perturbation method, we demonstrate that the double Dirac cone is composed of two identical and overlapping Dirac cones whose linear slopes can also be accurately predicted from the method. Because the double Dirac cone occurs at a relatively low frequency, a slab of the PC can be mapped onto a slab of zero refractive index material by using a standard retrieval method. Total transmission without phase change and energy tunneling at the double Dirac point frequency are unambiguously demonstrated by two examples. Potential applications can be expected in diverse fields such as acoustic wave manipulations and energy flow control.
KAUST Department:
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Citation:
Double Dirac cones in phononic crystals 2014, 105 (1):014107 Applied Physics Letters
Publisher:
American Institute of Physics
Journal:
Applied Physics Letters
Issue Date:
7-Jul-2014
DOI:
10.1063/1.4890304
Type:
Article
ISSN:
0003-6951; 1077-3118
Additional Links:
http://scitation.aip.org/content/aip/journal/apl/105/1/10.1063/1.4890304
Appears in Collections:
Articles; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorLi, Yanen
dc.contributor.authorWu, Yingen
dc.contributor.authorMei, Junen
dc.date.accessioned2015-03-17T06:05:25Zen
dc.date.available2015-03-17T06:05:25Zen
dc.date.issued2014-07-07en
dc.identifier.citationDouble Dirac cones in phononic crystals 2014, 105 (1):014107 Applied Physics Lettersen
dc.identifier.issn0003-6951en
dc.identifier.issn1077-3118en
dc.identifier.doi10.1063/1.4890304en
dc.identifier.urihttp://hdl.handle.net/10754/346724en
dc.description.abstractA double Dirac cone is realized at the center of the Brillouin zone of a two-dimensional phononic crystal (PC) consisting of a triangular array of core-shell-structure cylinders in water. The double Dirac cone is induced by the accidental degeneracy of two double-degenerate Bloch states. Using a perturbation method, we demonstrate that the double Dirac cone is composed of two identical and overlapping Dirac cones whose linear slopes can also be accurately predicted from the method. Because the double Dirac cone occurs at a relatively low frequency, a slab of the PC can be mapped onto a slab of zero refractive index material by using a standard retrieval method. Total transmission without phase change and energy tunneling at the double Dirac point frequency are unambiguously demonstrated by two examples. Potential applications can be expected in diverse fields such as acoustic wave manipulations and energy flow control.en
dc.publisherAmerican Institute of Physicsen
dc.relation.urlhttp://scitation.aip.org/content/aip/journal/apl/105/1/10.1063/1.4890304en
dc.rightsArchived with thanks to Applied Physics Lettersen
dc.titleDouble Dirac cones in phononic crystalsen
dc.typeArticleen
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
dc.identifier.journalApplied Physics Lettersen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionDepartment of Physics, South China University of Technology, Guangzhou 510640, Chinaen
dc.contributor.institutionDepartment of Physics, South China University of Technology, Guangzhou 510640, Chinaen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorWu, Yingen
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