Negative refraction of elastic waves in 2D phononic crystals: Contribution of resonant transmissions to the construction of the image of a point source | Zendy

Anne-Christine Hladky | Zendy; Charles Croënne | Zendy; Bertrand Dubus | Zendy; Jerome O. Vasseur | Zendy; Lionel Haumesser | Zendy; D. Manga | Zendy; Bruno Morvan | Zendy

Open Access

Negative refraction of elastic waves in 2D phononic crystals: Contribution of resonant transmissions to the construction of the image of a point source

Author(s) -

Anne-Christine Hladky,

Charles Croënne,

Bertrand Dubus,

Jerome O. Vasseur,

Lionel Haumesser,

D. Manga,

Bruno Morvan

Publication year - 2011

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.3676177

Subject(s) - rod , negative refraction , lens (geology) , optics , point source , refraction , prism , materials science , point (geometry) , lattice (music) , acoustic metamaterials , acoustics , crystal (programming language) , physics , acoustic wave , refractive index , geometry , mathematics , medicine , alternative medicine , pathology , computer science , programming language

Negative refraction properties of a two-dimensional phononic crystal (PC), made of a triangular lattice of steel rods embedded in epoxy are investigated both experimentally and numerically. First, experiments have been carried out on a prism shaped PC immersed in water. Then, for focusing purposes, a flat lens is considered and the construction of the image of a point source is analyzed in details, when indices are matched between the PC and the surrounding fluid medium, whereas acoustic impedances are mismatched. Optimal conditions for focusing longitudinal elastic waves by such PC flat lens are then discussed

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