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pacome delva

Novel negative-index metamaterial bends light 'wrong' direction - 1 views

  • the first negative index metamaterial to operate at visible frequencies
  • By engineering a metamaterial with such properties, we are opening the door to such unusual -- but potentially useful -- phenomena as superlensing (high-resolution imaging past the diffraction limit), invisibility cloaking, and the synthesis of materials index-matched to air, for potential enhancement of light collection in solar cells
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    I forwarded the link to my experimental colleagues and here is the comment from Sergei (the master himself:) "this is what Igor has been doing - an array of plasmonic nanocables. This basically works as a wire-medium slab. All their epsilon and mu are rubbish." * If Sergei is as strict as in this comment, then it IS rubbish. He's not one of the notorious complainer (as e.g. myself.) * Please DO NOT FORWARD this to anybody else, Sergei's comment is NOT FOR PUBLIC USE!
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    UPDATE: I had a short chat with Sergei and Pekka, Sergei noticed that there is an increasing number of papers on metamaterials, especially in Nature and Science, which are simply wrong, this one being an example. * The idea is based on a very well known effect of wired media. What appears to be interesting about this paper is that they manage to make an optical analogue with aparently low losses. This could be interesting. * The whole interpretation as NIM, "wrong" refraction etc. is total nonsense.
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    wow, good to know ! But for the privacy you should be aware that this is a public group, so anyone has access to our comments i think !
LeopoldS

In Silicon Valley, Socks Make the Tech Entrepreneur - NYTimes.com - 2 views

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    Funny article .... Reminds me a bit of Luzi :-) And look at this phrase: am I in good or bad company ? "Sergey Brin, a founder of Google, rarely leaves home without his Vibram FiveFingers nylon shoes." In the article it is mentioned as a sign of particularly bad taste :-)
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    But there should be a second article on sandals! And finally one on the synthesis: socks with sandals... :-)
Marcus Maertens

New Techniques from Google and Ray Kurzweil Are Taking Artificial Intelligence to Anoth... - 1 views

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    Winter is coming... and deep learning, too!
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    "Sergey Brin has said he wants to build a benign version of HAL in 2001: A Space Odyssey" ... didn't they try to do that in that movie called "2001: A Space Odyssey" ?
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