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Re: [Phys-l] Negative Index of Refraction



Metamaterials -- they were called artificial dielectrics.

I enjoy demonstrating such at microwave frequencies, concave lenses that converge light beams and prisms that refract the "wrong" way. Also optical activity from copper coils. Physics Today* discussed this using resonant elements, not the layers.



* I think this is the article.

http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PHTOAD000063000010000032000001&idtype=cvips&gifs=yes&ref=no


bc thanks to C.O. for pointing out it uses plasmons -- he shoulda guessed, as he researched plasmons in Ag. in Chile


p.s.


p.p.s. Koch at Bell Labs. demonstrated anomalous dispersion at S/C-band using wire resonators.

Kock, W.E. (1948). "Metallic Delay Lenses". Bell. Sys. Tech. Jour. 27: 58–82



On 2010, Dec 03, , at 08:35, curtis osterhoudt wrote:

They have developed a theoretical model relying on plasmon coupling, which
happens to be impedance-matched at 400 nm. Though it has the potential to couple
to much of the visible spectrum, they haven't build the stuff, nor have they
shown isotropy at any wavelength other than 400 nm. It also only works for
TM-polarized light.


Very neat, and an interesting application of Pendry, et al's work, but still in
the very early stages.


/**************************************
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Some do bow in that final direction. Others advance upon it. To bow before the
one is to lose sight of the three. I may submit to the unknown, but never to the
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________________________________
From: Chuck Britton <cvbritton@embarqmail.com>
To: phys-l@carnot.physics.buffalo.edu
Sent: Fri, December 3, 2010 8:20:21 AM
Subject: [Phys-l] Negative Index of Refraction

The Dutch have the stuff for visible wavelengths.

http://www.amolf.nl/news/detailpage/back_to/news/article/light-in-reverse-three-dimensional-metamaterials-with-a-negative-index-of-refraction//chash/6ce6fbf61f/

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_______________________________________________
Forum for Physics Educators
Phys-l@carnot.physics.buffalo.edu
https://carnot.physics.buffalo.edu/mailman/listinfo/phys-l