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metamaterials News
‘Metascreen’ forms ultrathin invisibility cloak
AUSTIN, Texas – A new invisibility cloak can hide 3-D objects from microwaves while in their natural environment, in all directions and from all of the observers’ positions. Most invisibility cloaks up to this point have been large, cumbersome contraptions. The University of Texas at Austin’s cloak, however, uses an ultrathin material called a “metascreen” that was fabricated by attaching strips of 66-µm-thick copper tape to a 100-µm-thick, flexible polycarbonate film...
Material converts ultrasound waves into optical signals
LONDON – Ultrasound images have never looked sharper, thanks to a new metamaterial that converts ultrasound waves into optical signals, providing high-resolution images for biomedical applications. Conventional ultrasound technology relies on generating...
New metamaterials are easily manufactured
UNIVERSITY PARK, Pa. – By combining theory and practice, two groups of Penn State scientists have designed low-loss optical metamaterials that are easily manufactured for custom applications with dispersions that can be tuned over large bandwidths. Designing...
People In The News
May 1, 2013 — The 2013 Materials Research Society conferred its Outstanding Young Investigator Award to Alexandra Boltasseva, a Purdue University assistant professor, for developing novel materials for advanced plasmonic, metamaterial and transformation optics...
Collaboration Makes Easily Manufactured Optical Metamaterials
UNIVERSITY PARK, Pa., March 29, 2013 — Controlling the optics of metamaterials involves using complicated structures that are difficult to manufacture in large numbers and at small sizes at optical wavelengths. However, engineers are collaborating to change that with a nanonotch,...
‘Metascreen’ Forms Ultrathin Invisibility Cloak
AUSTIN, Texas, March 26, 2013 — A new ultrathin Harry Potterlike invisibility cloak can hide three-dimensional objects from microwaves while in their natural environment, in all directions and from all of the observers’ positions.
Boltasseva Honored by MRS for Novel Optics
WARRENDALE, Pa., March 12, 2013 — Alexandra Boltasseva, a Purdue University assistant professor who developed novel materials for advanced plasmonic, metamaterial and transformation optics devices, is the recipient of the 2013 Materials Research Society’s (MRS) Outstanding Young...
Material Converts Ultrasound Waves into Optical Signals
LONDON, March 7, 2013 — Ultrasound images have never looked sharper, thanks to a new metamaterial that converts ultrasound waves into optical signals, providing high-resolution images for biomedical applications.
Sprinkled silver nanocubes enhance light absorption
DURHAM, N.C. – Just as salt sprinkled over a piece of meat enhances its flavor, tiny silver cubes sprinkled at random on a polymer-coated gold surface enhance the material’s ability to “perfectly” absorb light of a given wavelength. A simple...
Device Creates Multiple ‘Ghosts’
SINGAPORE, Feb. 19, 2013 — An optical device that uses metamaterials and optical scattering to “engineer” multiple ghosts — the holy grail of the fields of optical illusions, electromagnetics and radar detection — offers new possibilities for cognitive deception through the...
Metamaterials manipulate light on a microchip
UNIVERSITY PARK, Pa. – Controlling light on a microchip is no easy feat, but new theoretical designs for miniaturized optical devices made of metamaterials could make it a little easier. A unified theory from researchers at Penn State University combines metamaterials and...
QDs Are Entering the Mainstream
Feb 1, 2013 — Since their discovery in the 1980s, quantum dots have been quietly gaining momentum, making slow but steady headway in applications from displays and lighting to photovoltaics and health care. Unique and versatile, quantum dots (QDs) are no longer...
Photonics West Boasts Largest Program Yet
SAN FRANCISCO, Dec. 13, 2012 — SPIE Photonics West will set records again this year, thanks to its largest-ever biomedical technical program and BiOS Expo, which are driving growth for the 2013 event, SPIE said.
Sprinkled Silver Nanocubes Make Super Light Absorbers
DURHAM, N.C., Dec. 7, 2012 — Microscopic silver cubes, when sprinkled at random on a polymer-coated gold surface, can provide a simple and tunable way to create large-area absorbers that “perfectly” absorb light of a given wavelength.
Metamaterials Manipulate Light on a Microchip
UNIVERSITY PARK, Pa., Nov. 28, 2012 — Controlling light on a microchip is no easy feat, but new theoretical designs for miniaturized optical devices made of metamaterials may provide a solution.
Enhanced Cloaking Device Eliminates Reflections
DURHAM, N.C., Nov. 12, 2012 — A new technology refines the original invisibility cloak by eliminating the reflections at the edges of the device that result in lost waves — one of the key issues preventing complete invisibility. The enhanced metamaterial could revolutionize...
New approach strengthens negative refraction
CAMBRIDGE, Mass. – An “extraordinarily strong” negative refractive index as large as -700 – more than 100 times larger than most previously reported – has been achieved in metamaterials using a technique developed by scientists at Harvard...
New class of 3-D optical cavities demonstrated
BERKELEY, Calif. – Nanoscale three-dimensional optical cavities made from metamaterials can generate the most powerful nanolaser beams to date. This new class of optical cavities, with remarkable electromagnetic properties, holds promise for a variety of other...
Sound Waves Focused Like A Camera Lens
UNIVERSITY PARK, Pa., Aug. 10, 2012 — A metamaterial capable for the first time of manipulating a variety of acoustic waves with one simple device was designed and computationally tested. The device holds promise for applications across various acoustic fields, from medical ultrasound...
A Novel Approach to Negative Refraction
CAMBRIDGE, Mass., Aug. 2, 2012 — An “extraordinarily strong” negative refractive index as large as -700 - more than 100 times larger than most previously reported - was achieved in metamaterials using a new technique developed by scientists at the Harvard School of Engineering and...
True Invisibility Remains Elusive
Aug 1, 2012 — But research moves toward practical applications of cloaking technology. Invisibility cloaks have long captured our imaginations, whether actual cloaks imbued with magical powers – see the Lord of the Rings and the Harry Potter series –...
3-D Optical Cavities Made from Metamaterials
BERKELEY, Calif., June 27, 2012 — Three-dimensional nanoscale optical cavities made from metamaterials have the potential to generate the most intense nanolaser beams to date and hold promise for a range of other technologies, including LEDs, optical sensing, nonlinear optics,...
Plasmonic material bridges photonics, electronics gap
WEST LAFAYETTE, Ind. – A thin film of titanium nitride was coaxed into transporting plasmons, becoming the first nonmetal to be added to the short list of surface-plasmon-supporting materials and bridging the gap between photonics and electronics. The nonmetal could pave...
New Metamaterial Creates Practical, Tunable Devices
WEST LAFAYETTE, Ind., May 21, 2012 — A novel metamaterial can easily be integrated into semiconductor electronics, which could advance sensors, solar collectors, quantum computing and optical cloaks, and could lead to devices that make optical microscopes 10 times more powerful. Noble...
New Candidates Sought for Metamaterial Conductors
AMES, Iowa, April 26, 2012 — A new method that evaluates different conductors for use in metamaterial structures could bring closer to reality super-efficient solar energy devices and superlenses that allow us to use visible light to see molecules like DNA.
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