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Latest Cloak of invisibility Stories

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2011-02-02 06:00:00

Researchers in Britain and Denmark have unveiled an "Ëœinvisibility cloak' that uses a common crystalline material known as calcite, which works by sending its two "polarizations" of light in different directions. Cloaking involves guiding light waves in such a way that waves from a hidden object do not reach the eye.  By using calcite, the researchers created an "Ëœinvisibility cloak' that hid a small (inch-size), three-dimensional object.  However, the size of...

2011-01-25 13:05:45

Researchers are developing a new class of "plasmonic metamaterials" as potential building blocks for advanced optical technologies, including ultrapowerful microscopes and computers, improved solar cells, and a possible invisibility cloak. The new materials could make possible "nanophotonic" devices for numerous applications, said Alexandra Boltasseva, an assistant professor of electrical and computer engineering at Purdue University. Unlike natural materials, metamaterials may possess an...

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2011-01-06 11:17:25

Liz Ahlberg, Physical Sciences Editor, University of Illinois In one University of Illinois lab, invisibility is a matter of now you hear it, now you don't. Led by mechanical science and engineering professor Nicholas Fang, Illinois researchers have demonstrated an acoustic cloak, a technology that renders underwater objects invisible to sonar and other ultrasound waves. "We are not talking about science fiction. We are talking about controlling sound waves by bending and twisting them in a...

2010-11-16 17:00:00

Design for Manmade Light Trapping Device Could Help Harvest Light for Solar Cells. WASHINGTON, Nov. 16, 2010 /PRNewswire-USNewswire/ -- While our direct knowledge of black holes in the universe is limited to what we can observe from thousands or millions of light years away, a team of Chinese physicists has proposed a simple way to design an artificial electromagnetic (EM) black hole in the laboratory. (Logo: http://www.newscom.com/cgi-bin/prnh/20100714/AIPLOGO) (Logo:...

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2010-11-04 09:45:00

Researchers at the University of St. Andrews have devised a material, comprised solely of tiny atoms that can interact with light, which brings the possible invention of an invisibility cloak one step closer to becoming a reality. Writing in the Thursday edition of the New Journal of Physics, Dr. Andrea Di Falco and her colleagues describe Metaflex, a flexible metamaterial that interrupts the flow of light rays and forces them to flow around the object which it covers--"rather like water that...

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2010-08-12 19:20:00

Researchers at the Tufts University School of Engineering and Boston University have fabricated and characterized the first large area metamaterial structures patterned on implantable, bio-compatible silk substrates.The research, reported online July 21, 2010, in the journal Advanced Materials, provides a promising path towards the development of a new class of metamaterial-inspired implantable biosensors and biodetectors.  Metamaterials are artificial electromagnetic composites,...

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...

2010-07-22 12:27:42

An invisibility cloak made of glass From Tolkien's ring of power in The Lord of the Rings to Star Trek's Romulans, who could make their warships disappear from view, from Harry Potter's magical cloak to the garment that makes players vanish in the video game classic "Dungeons and Dragons, the power to turn someone or something invisible fascinates mankind. But who ever thought that a scientist at Michigan Technological University would be serious about building a working invisibility cloak?...

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2010-07-07 07:21:23

Powerful new microscopes able to resolve DNA molecules with visible light, superfast computers that use light rather than electronic signals to process information, and Harry Potteresque invisibility cloaks are just some of the many thrilling promises of transformation optics. In this burgeoning field of science, light waves can be controlled at all lengths of scale through the unique structuring of metamaterials, composites typically made from metals and dielectrics "“ insulators that...

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2010-05-28 09:16:44

Scalable devices inspired by nature exhibit customizable optical properties suitable for applications ranging from highly sensitive sensors and detectors to invisibility cloaks Imagine creating novel devices with amazing and exotic optical properties not found in Nature"”by simply evaporating a droplet of particles on a surface. By chemically building clusters of nanospheres from a liquid, a team of Harvard researchers, in collaboration with scientists at Rice University, the University...


Word of the Day
endocarp
  • The hard inner (usually woody) layer of the pericarp of some fruits (as peaches or plums or cherries or olives) that contains the seed.
This word comes from the Greek 'endon,' in, within, plus the Greek 'kardia,' heart.
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