Structures with near-zero parameters (for example, media with near-zero relative permittivity
and/or relative permeability, and thus a near-zero refractive index) exhibit a number of …

The discovery, design and development of materials are critically linked to advances in
many areas of research, and optics is no exception. Recently, the spectral region in which …

A zero-refractive-index metamaterial is one in which waves do not experience any spatial
phase change, and such a peculiar material has many interesting wave-manipulating …

Optical materials with a dielectric constant near zero have the unique property that light
advances with almost no phase advance. Although such materials have been made …

Doping a semiconductor with foreign atoms enables the control of its electrical and optical
properties. We transplant the concept of doping to macroscopic photonics, demonstrating …

We fabricate and characterize a metal-dielectric nanostructure with an effective refractive
index n= 0 in the visible spectral range. Light is excited in the material at deep …

Metamaterials with an effective zero refractive index associated with their electromagnetic
response are sought for a number of applications in communications and nonlinear optics. A …

From the fundamental principle of causality we show that epsilon-near-zero (ENZ) materials
with a very low (asymptotically zero) intrinsic dielectric loss do necessarily possess a very …

We introduce the acoustic equivalent of “supercoupling” by studying the anomalous sound
transmission and uniform energy squeezing through ultranarrow acoustic channels filled …

We theoretically investigate microwave transmission through a zero-index metamaterial
loaded with dielectric defects. The metamaterial is impedance matched to free space, with …