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Engineers create theoretical design of an Optical Cloak

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posted on Apr, 2 2007 @ 03:32 PM
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www.physorg.com...


The Purdue University engineers, following mathematical guidelines devised in 2006 by physicists in the United Kingdom, have created a theoretical design that uses an array of tiny needles radiating outward from a central spoke. The design, which resembles a round hairbrush, would bend light around the object being cloaked. Background objects would be visible but not the object surrounded by the cylindrical array of nano-needles, said Vladimir Shalaev, Purdue's Robert and Anne Burnett Professor of Electrical and Computer Engineering.

The design does, however, have a major limitation: It works only for any single wavelength, and not for the entire frequency range of the visible spectrum, Shalaev said.


Another step forward in the quest for full Optical Cloaks. You knew it had to come sooner or later. I want to see what other wavelengths can be cloaked with technology such as this. Imagine covering spacecraft with a metamaterial hull that cloaks the craft from all harmful radiation, eliminating the need for massive and expensive shielding.

[edit on 2-4-2007 by sardion2000]



posted on Apr, 2 2007 @ 03:45 PM
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Originally posted by sardion2000

Another step forward in the quest for full Optical Cloaks. You knew it had to come sooner or later. I want to see what other wavelengths can be cloaked with technology such as this. Imagine covering spacecraft with a metamaterial hull that cloaks the craft from all harmful radiation, eliminating the need for massive and expensive shielding.


Interesting, and maybe you could for EM, like X-rays and gamma.

But it won't do a lot for secondary x-rays kicked out by beta particles, for example. Still, it might cut down on a good bit of the total dose.



posted on Apr, 3 2007 @ 10:17 PM
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umm, gamma radiation interacts with material, regardless of what the material is made from and the reaction occurs with the electrons. I don't think this would have any affect on gamma radiation.



posted on Apr, 3 2007 @ 10:20 PM
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Originally posted by porky1981
umm, gamma radiation interacts with material, regardless of what the material is made from and the reaction occurs with the electrons. I don't think this would have any affect on gamma radiation.



It's Electro-magnetic cloaking(for a single wavelength). Gamma-rays are a form of Electro-magnetic radiation. If they can do this with Visible light as well as non-visible light of a higher wavelength, then there is no reason to suspect that one cannot do it with a non-visible wavelength below the visible spectrum. Remember all they are doing is bending the specific wavelength around the "cloaked" object. They aren't shielding it in the traditional sense, so the interaction would still take place, it just wouldn't effect anything on the inside of the cloak.



[edit on 3-4-2007 by sardion2000]




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