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Latest Negative refraction Stories

Research Helps Lay Out Theory For Metamaterials That Act As Analog Computer
2014-01-10 09:54:04

[ Watch The Video: Explaining Metamaterials ] University of Pennsylvania The field of metamaterials has produced structures with unprecedented abilities, including flat lenses, invisibility cloaks and even optical "metatronic" devices that can manipulate light in the way electronic circuitry manipulates the flow of electrons. Now, the birthplace of the digital computer, ENIAC, is using this technology in the rebirth of analog computing. A study by researchers at the University...

Negative Refraction In Metamaterials
2012-08-02 11:02:12

April Flowers for redOrbit.com - Your Universe Online In a vacuum, light moves extraordinarily fast. Fast enough to circle the Earth seven times before you can literally blink your eye. When light travels through matter, however, it slows down by just less than a factor of five. This refractive index factor is positive in naturally occurring materials, causing light to bend in a particular direction when it passes through matter like water or a glass, for example. In the last 20...

2012-06-27 17:50:04

Berkeley Lab Development Holds Promise for Nanolasers, LEDs, Optical Sensors and Photonic Communications The world´s smallest three-dimensional optical cavities with the potential to generate the world´s most intense nanolaser beams have been created by a scientific team led by researchers with the U.S. Department of Energy (DOE)´s Lawrence Berkeley National Laboratory (Berkeley Lab) and the University of California (UC) Berkeley. In addition to nanolasers, these unique...

Michigan Tech Researcher Nears Creation Of Superlens
2012-01-09 04:37:13

A superlens would let you see a virus in a drop of blood and open the door to better and cheaper electronics. It might, says Durdu Guney, make ultra-high-resolution microscopes as commonplace as cameras in our cell phones. No one has yet made a superlens, also known as a perfect lens, though people are trying. Optical lenses are limited by the nature of light, the so-called diffraction limit, so even the best won´t usually let us see objects smaller than 200 nanometers across, about...

2011-11-09 10:36:17

A new type of active metamaterial that incorporates semiconductor devices into conventional metamaterial structures is demonstrating an ability to have power gain while retaining its negative refraction property, a first in the world of metamaterials research. "Our simulation and experimental results show that the addition of the battery powered semiconductor diodes not only provided gain, but also maintained the negative index of this kind of metamaterial," said Dr. Hao Xin of the...

2011-04-05 17:56:10

A very simple bench-top technique that uses the force of acoustical waves to create a variety of 3D structures will benefit the rapidly expanding field of metamaterials and their myriad applications"”including "invisibility cloaks." Metamaterials are artificial materials that are engineered to have properties not found in nature. These materials usually gain their unusual properties"”such as negative refraction that enables subwavelength focusing, negative bulk modulus, and band...

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2010-08-09 06:30:20

Advance in metamaterials leads to a new semiconductor laser suitable for security screening, chemical sensing and astronomy A collaborative team of applied scientists from Harvard University and the University of Leeds have demonstrated a new terahertz (THz) semiconductor laser that emits beams with a much smaller divergence than conventional THz laser sources. The advance, published in the August 8th issue of Nature Materials, opens the door to a wide range of applications in terahertz...

2010-08-05 14:43:07

Researchers have overcome a fundamental obstacle in using new "metamaterials" for radical advances in optical technologies, including ultra-powerful microscopes and computers and a possible invisibility cloak. The metamaterials have been plagued by a major limitation: too much light is "lost," or absorbed by metals such as silver and gold contained in the metamaterials, making them impractical for optical devices. However, a Purdue University team has solved this hurdle, culminating three...

2009-09-29 13:06:40

Since 2000, John Pendry's work on metamaterials has been at the van guard of efforts to create a perfect image "“ images with perfect resolution that can stem from light being moved in odd directions to create, among other tricks of the light, the illusion of invisibility. One exciting development was Pendry's theoretically perfect work on negative refraction, which offered the possibility of lenses that could create images with resolution not possible with conventional lenses. But this...

2009-08-13 12:26:50

While the researchers can't promise delivery to a parallel universe or a school for wizards, books like Pullman's Dark Materials and JK Rowling's Harry Potter are steps closer to reality now that researchers in China have created the first tunable electromagnetic gateway.The work, 'A simple route to a tunable electromagnetic gateway' is a further advance in the study of metamaterials, published today, Thursday, 14 August, in New Journal of Physics (co-owned by the Institute of Physics and...


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  • A blustering, bullying fellow; a pot-valiant braggart; a bully.
This word is named for Draw-Can-Sir, a character in George Villiers' 17th century play The Rehearsal.
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