Periodic structures with a sub‐wavelength pitch have been known since Hertz conducted his
first experiments on the polarization of electromagnetic waves. While the use of these …

The introduction of engineered resonance phenomena on surfaces has opened a new
frontier in surface science and technology. Pillared phononic crystals, metamaterials, and …

We designed and characterized a two-dimensional, gradient-index phononic crystal (GRIN
PC) to control the propagation of acoustic waves. The GRIN PC was composed of solid …

Current optical communication systems rely almost exclusively on multimode fibres for short-
and medium-haul transmissions, and are now expanding into the long-haul arena. Ultra …

We explore the enhancement of structure-borne elastic wave energy harvesting, both
numerically and experimentally, by exploiting a Gradient-Index Phononic Crystal Lens …

The great interest in photonic crystals and their applications in the last 15 years is being
expressed in the publishing of a large number of monographs, collections, textbooks and …

Engineering of a refractive index profile is a powerful method for controlling electromagnetic
fields. In this paper, we investigate possible realization of isotropic gradient refractive index …

The focalization of elastic waves within a two dimensional gradient-index phononic crystal
(GRIN PC) is numerically and experimentally investigated. The structure is formed by a …

Here, we propose the concept of an “optical vacuum cleaner” for optomechanical
manipulation of nanoparticles. We utilize a dielectric cuboid to generate an optical gradient …

We present a new technique for the design of transformation-optics devices based on large-
scale optimization to achieve the optimal effective isotropic dielectric materials within …