Near-zero refractive index photonics

I Liberal, N Engheta - Nature Photonics, 2017 - nature.com
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 …

All-dielectric metamaterials

S Jahani, Z Jacob - Nature nanotechnology, 2016 - nature.com
The ideal material for nanophotonic applications will have a large refractive index at optical
frequencies, respond to both the electric and magnetic fields of light, support large optical …

Enhanced Nonlinear Refractive Index in -Near-Zero Materials

L Caspani, RPM Kaipurath, M Clerici, M Ferrera… - Physical review …, 2016 - APS
New propagation regimes for light arise from the ability to tune the dielectric permittivity to
extremely low values. Here, we demonstrate a universal approach based on the low linear …

Dirac cones induced by accidental degeneracy in photonic crystals and zero-refractive-index materials

X Huang, Y Lai, ZH Hang, H Zheng, CT Chan - Nature materials, 2011 - nature.com
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 …

Photonic doping of epsilon-near-zero media

I Liberal, AM Mahmoud, Y Li, B Edwards, N Engheta - Science, 2017 - science.org
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 …

Epsilon-near-zero metamaterials and electromagnetic sources: Tailoring the radiation phase pattern

A Alu, MG Silveirinha, A Salandrino, N Engheta - Physical Review B …, 2007 - APS
In this work, we investigate the response of epsilon-near-zero metamaterials and plasmonic
materials to electromagnetic source excitation. The use of these media for tailoring the …

Experimental Verification of Epsilon-Near-Zero Metamaterial Coupling<? format?> and Energy Squeezing Using a Microwave Waveguide

B Edwards, A Alù, ME Young, M Silveirinha… - Physical review letters, 2008 - APS
Utilizing a microwave setup, we experimentally verify our recently developed theory of
energy squeezing and tunneling [Phys. Rev. Lett. 97, 157403 (2006) PRLTAO 0031-9007 …

First-principles homogenization theory for periodic metamaterials

A Alù - Physical Review B—Condensed Matter and Materials …, 2011 - APS
We derive from first principles an accurate homogenized description of periodic
metamaterials made of magnetodielectric inclusions, highlighting and overcoming relevant …

Theory of supercoupling, squeezing wave energy, and field confinement in narrow channels and tight bends using near-zero metamaterials

MG Silveirinha, N Engheta - Physical Review B—Condensed Matter and …, 2007 - APS
In this work, we investigate the detailed theory of the supercoupling, anomalous tunneling
effect, and field confinement originally identified by Silveirinha and Engheta [Phys. Rev. Lett …

Wave–matter interactions in epsilon-and-mu-near-zero structures

AM Mahmoud, N Engheta - Nature communications, 2014 - nature.com
In recent years, the concept of metamaterials has offered platforms for unconventional
tailoring and manipulation of the light–matter interaction. Here we explore the notion of …