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Search results for negative index metamaterials

Optics & Photonics Apr 2, 2019

Intelligent metamaterials behave like electrostatic chameleons

A chameleon can flexibly change its colour to match its surroundings. And a similar phenomenon can now be seen in a new class of smart materials called metamaterials. The trouble is that these metamaterials lack the ability ...

Optics & Photonics Jan 31, 2019

Biophotonics: In situ printing liquid superlenses to image butterfly wings and nanobiostructures

Nanostructures and natural patterns have long fascinated researchers in bioinspired materials engineering. Biological samples can be imaged and observed at the nanoscale using sophisticated analytical tools in materials science, ...

Optics & Photonics Aug 29, 2018

Light programmable guidance of direct current fields in Laplacian metadevices

To enable negative refraction and related optical illusions, metamaterials are artificially engineered with unique properties that result from their internal physical structures, rather than their chemical composition. The ...

Optics & Photonics Apr 13, 2017

New infrared-emitting device could allow energy harvesting from waste heat

A new reconfigurable device that emits patterns of thermal infrared light in a fully controllable manner could one day make it possible to collect waste heat at infrared wavelengths and turn it into usable energy.

Optics & Photonics Mar 10, 2017

Âé¶¹ÒùÔºicists predict the existence of unusual optical composites

Âé¶¹ÒùÔºicists from MIPT have predicted the existence of transparent composite media with unusual optical properties. Using graphics card-based simulations, scientists studied regular volume structures composed of two dielectrics ...

Optics & Photonics Mar 9, 2017

'Photonic doping' makes class of metamaterials easier to fabricate

The field of metamaterials, an intersection of materials science, physics, nanotechnology and electrical engineering, aims to produce structures with unusual electromagnetic properties. Through the careful combination of ...

Condensed Matter Feb 21, 2017

Engineers overcome a hurdle in growing a revolutionary optical metamaterial

When John Crocker, a professor of chemical and biomolecular engineering in the University of Pennsylvania's School of Engineering and Applied Science was a graduate student, his advisor gathered together everyone in his lab ...

Nanophysics Oct 5, 2016

Electrons in graphene behave like light, only better

A team led by Cory Dean, assistant professor of physics at Columbia University, Avik Ghosh, professor of electrical and computer engineering at the University of Virginia, and James Hone, Wang Fong-Jen Professor of Mechanical ...

Optics & Photonics Jun 24, 2016

Ultrasensitive nonlinear metamaterials for data transfer

Scientists have demonstrated the effect of all-optical switching between streams of photons, born during the third harmonic generation process, using non-linear metamaterials. Researchers at Lomonosov Moscow State University ...

Optics & Photonics Jun 15, 2016

Electromagnetic metamaterials with zero-refractive index for sub-wavelength photonics

Materials scientists can produce sub-wavelength artificial structures (split rings, honeycomb shapes and many more) to interact with electromagnetic waves so that the propagation of waves can be arbitrarily controlled to ...

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