Quantcast
Last updated on April 21, 2014 at 4:51 EDT

Latest Cloak of invisibility Stories

365cd3aa041c23696704d122b8533263
2011-06-25 07:39:27

Scientists have developed a new device that makes objects invisible to sound waves. The approach borrows ideas from attempts to "cloak" objects from light. The scientists said it uses simple plastic sheets with arrays of holes, and could be put to use in making ships invisible to sonar or in an acoustic design for concert halls. Researchers have put forth effort to try and create "invisibility cloaks" since the feasibility of the idea was theorized in 2006. Those approaches are based on...

1dde9d8fc82fc7cb4d87b924cf52d9a0
2011-05-19 09:39:31

CFN Scientists at KIT Achieve Optical Invisibility in the Visible Light Spectrum "Seeing something invisible with your own eyes is an exciting experience," say Joachim Fischer and Tolga Ergin. For about one year, both physicists and members of the team of Professor Martin Wegener at KIT's Center for Functional Nanostructures (CFN) have worked on refining the structure of the Karlsruhe invisibility cloak to such an extent that it is also effective in the visible spectral range. In invisibility...

2011-04-28 00:24:42

Researchers at Northwestern University have created a new kind of cloaking material that can render objects invisible in the terahertz range. Though this design can't translate into an invisibility cloak for the visible spectrum, it could have implications in diagnostics, security, and communication. The cloak, designed by Cheng Sun, assistant professor of mechanical engineering at Northwestern's McCormick School of Engineering and Applied Science, uses microfabricated gradient-index...

c2e7459650077c7bf4de9ddbb00b35831
2011-04-20 09:13:50

Optical cloaking approach described in Optics Express shows potential for myriad futuristic applications Invisibility cloaks are seemingly futuristic devices capable of concealing very small objects by bending and channeling light around them. Until now, however, cloaking techniques have come with a significant limitation"”they need to be orders of magnitude larger than the object being cloaked. This places serious constraints on practical applications, particularly for 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...

53a696a87b54addaa86d5b5e405a29e11
2011-03-02 13:26:47

With NSF support, Elena Semouchkina and colleagues are experimenting with ways of using magnetic resonance to capture rays of visible light and route them around objects, rendering those objects invisible to the human eye By Marlene Cimons, National Science Foundation In 1897, H.G. Wells created a fictional scientist who became invisible by changing his refractive index to that of air, so that his body could not absorb or reflect light. More recently, Harry Potter disappeared from sight after...

4f1dd5ddbc07f25308a3e381b4642a4f
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...

3ff9ff543c53ab9e01be7d1a4d0da36c
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:...