Rutledge
Master Sergeant
- Joined
- Mar 17, 2006
- Messages
- 1,224
Invisibility cloak one step closer, scientists say (from Yahoo)
WASHINGTON (Reuters) - Scientists have created two new types of materials that can bend light the wrong way, creating the first step toward an invisibility cloaking device.
One approach uses a type of fishnet of metal layers to reverse the direction of light, while another uses tiny silver wires, both at the nanoscale level.
Both are so-called metamaterials -- artificially engineered structures that have properties not seen in nature, such as negative refractive index.
The two teams were working separately under the direction of Xiang Zhang of the Nanoscale Science and Engineering Center at the University of California, Berkeley with U.S. government funding. One team reported its findings in the journal Science and the other in the journal Nature.
Each new material works to reverse light in limited wavelengths, so no one will be using them to hide buildings from satellites, said Jason Valentine, who worked on one of the projects.
"We are not actually cloaking anything," Valentine said in a telephone interview. "I don't think we have to worry about invisible people walking around any time soon. To be honest, we are just at the beginning of doing anything like that."
...
"However, cloaking may be something that this material could be used for in the future," he said. "You'd have to wrap whatever you wanted to cloak in the material. It would just send light around. By sending light around the object that is to be cloaked, you don't see it."
---------------------------------------------------------------
Nevermind the implications for the world - what about the toy soldier industry! What would invisible soldiers look like?
Would the figures still need to be made in China? Would there be a significant reduction in materials costs?? Would certain forum members still point out minor perceived flaws?? Best question: Would the manufacturers and dealers accept "cloaked" funds??
WASHINGTON (Reuters) - Scientists have created two new types of materials that can bend light the wrong way, creating the first step toward an invisibility cloaking device.
One approach uses a type of fishnet of metal layers to reverse the direction of light, while another uses tiny silver wires, both at the nanoscale level.
Both are so-called metamaterials -- artificially engineered structures that have properties not seen in nature, such as negative refractive index.
The two teams were working separately under the direction of Xiang Zhang of the Nanoscale Science and Engineering Center at the University of California, Berkeley with U.S. government funding. One team reported its findings in the journal Science and the other in the journal Nature.
Each new material works to reverse light in limited wavelengths, so no one will be using them to hide buildings from satellites, said Jason Valentine, who worked on one of the projects.
"We are not actually cloaking anything," Valentine said in a telephone interview. "I don't think we have to worry about invisible people walking around any time soon. To be honest, we are just at the beginning of doing anything like that."
...
"However, cloaking may be something that this material could be used for in the future," he said. "You'd have to wrap whatever you wanted to cloak in the material. It would just send light around. By sending light around the object that is to be cloaked, you don't see it."
---------------------------------------------------------------
Nevermind the implications for the world - what about the toy soldier industry! What would invisible soldiers look like?
Would the figures still need to be made in China? Would there be a significant reduction in materials costs?? Would certain forum members still point out minor perceived flaws?? Best question: Would the manufacturers and dealers accept "cloaked" funds?? 
