Title :
Focusing capability of a phononic crystal based on a hollow metallic structure
Author :
Hladky-Hennion, A.-C. ; Croenne, Charles ; Vasseur, J.O. ; Haumesser, Lionel ; Norris, A.N.
Author_Institution :
Inst. d´Electron. de Microelectron. et de Nanotechnol. (IEMN), Lille, France
Abstract :
The dispersion curves of a phononic crystal (PC) based on a hollow metallic structure are presented. They exhibit a negative refraction dispersion branch and perfect refractive index matching with the surrounding water, leading to focusing capability. Numerical and experimental results are reported for a flat PC lens. The characteristics of the focal spot (intensity, dimensions, etc.) are numerically and experimentally investigated with the goal of finding the frequency of the optimal imaging performance.
Keywords :
phononic crystals; refractive index; dispersion curves; hollow metallic structure; negative refraction dispersion; optimal imaging; phononic crystal; refractive index; Dispersion; Focusing; Indexes; Lattices; Lenses; Slabs; Wavelength measurement;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
DOI :
10.1109/TUFFC.2014.3038
