title: Focusing capability of a phononic crystal based on a hollow metallic structure.
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.
authors: Anne-Christine
authors: AC
authors: Hladky-Hennion
authors: Charles
authors: C
authors: Croenne
authors: Jerome
authors: J
authors: Vasseur
authors: Lionel
authors: L
authors: Haumesser
authors: Andrew
authors: A
authors: Norris