Topology-optimized thermal metamaterials traversing full-parameter anisotropic space

Anisotropic metamaterials for full control of acoustic waves.

We study a class of acoustic metamaterials formed by layers of perforated plates and producing negative refraction and backward propagation of sound. A slab of such material is shown to act as a perfect acoustic lens, yielding images with subwavelength resolution over large distances. Our study constitutes a nontrivial extension of similar concepts from optics to acoustics, capable of sustainin...

3d Printing of Anisotropic Metamaterials

Material properties in radio frequency and microwave regimes are limited due to the lack of molecular resonances at these frequencies. Metamaterials are an attractive means to realize a prescribed permittivity or permeability function, but these are often prohibitively lossy due to the use of inefficient metallic resonators. All-dielectric metamaterials offer excellent potential to overcome the...

Basic Fundamental Optimized Topology Design For Free Space Optical Networks

Wireless mesh network addresses the last mile issue. This technology utilizes radio frequency (RF). The practical limitations and challenges of RF based communication networks have become increasingly apparent over the past decade, leading researchers to seek new hybrid communication approaches. One promising strategy that has been the subject of considerable interest is the augmentation of RF ...

Wave propagation in two-dimensional anisotropic acoustic metamaterials of K4 topology

Hypergratings: nanophotonics in planar anisotropic metamaterials.

We present a technique capable of producing subwavelength focal spots in planar nonresonant structures not limited to the near-field of the source. The approach combines the diffraction gratings that generate the high-wave-vector-number modes and planar slabs of homogeneous anisotropic metamaterials that propagate these waves and combine them at the subwavelength focal spots. In a sense, the te...