资讯

The Physics of Invisibility: Metamaterials and Cloaking Devices Metamaterials (negative refractive index) bend light around objects, creating "invisibility cloaks" (2006 Duke University breakthrough).
The idea of spatial cloaking consists of the probe light being bent in a precise fashion to prevent it from being scattered by the object, which thus remains hidden from an observer. This has been ...
Previous cloaking efforts required materials as much as 10 times thicker than the wavelength being dodged. Missile guidance and marine radar wavelengths measure roughly 3 centimeters; that would ...
The non-magnetic nature of our design eases the pain of constructing gradient magnetic metamaterials in three-dimensional space, and therefore paves the way for the realization of cloaking devices ...
"But this is a first design step toward creating an optical cloaking device that might work for all wavelengths of visible light," he said. Research findings are detailed in a paper appearing this ...
While Star Trek brought the idea of a cloaking device into the popular consciousness, the closest we've come has been through the development of stealth technology. The invisibility to radar ...
A new study offers the first demonstration of invisibility cloaking based on the manipulation of the frequency (color) of light waves as they pass through an object, a fundamentally new approach ...
There are the many potential military uses of cloaking technology, of course, but it could also help improve cellular signals by hiding objects that would normally block and weaken signal strength.
Cloaking things from visible light long has been a staple of science fiction, from invisible Romulan Bird of Prey warships in "Star Trek" to cloaking devices in books, games, films and shows like ...
Recent research on time cloaking has revealed a fascinating approach to hide temporal events from an interrogating optical field, by opening up and subsequently closing intensity gaps in a probe beam.
Search Engine Land » Platforms » Google » Google News » YADAC: Yet Another Debate About Cloaking Happens Again Sigh. Double sigh. Triple sigh. I guess now that the SEO industry has had the ...
The plume is forecast to move northwest and reach Florida mid-week, then hit other states including Georgia, the Carolinas, Texas and Louisiana by Friday, radar shows.