Michael Berg wrote:
> Hej alle,
>
> Findes der et apparat der kan skifte EM stråling op og ned i spektrummet i
> realtime? Dvs. bølgelængde X ind = bølgelængde Y ud?
>
....
> /Michael
Hej Michael
Ja kig her under:
http://da.wikipedia.org/wiki/Fotonisk_krystal
Se adressen:
2004-05-24, Sciencedaily: Tightly Focused Laser Light Generates
Nonlinear Effects And Rainbow Of Color:
http://www.sciencedaily.com/releases/2004/05/040521071505.htm
Citat: "..."supercontinuum generation in nonlinear fibers." The
phenomenon can be observed in a new class of optical fibers, called
photonic crystal fibers. PCFs consist of a tiny solid glass core
surrounded by a cladding, or casing, that contains air holes along the
length of the fiber...As the IR light propagates, or spreads, through a
1-meter-long fiber, the light appears, first orange, then yellow and
finally green...The visible lightwaves emerge from the fiber as white
light, which contains all the colors of the spectrum..."
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Et almindeligt farvekamera og farvefjernsyn kan f.eks. lave den røde
kanal om ti blåt lys.
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Her nævnes et ulineart krystal "crystal of beta barium borate" kan
omdannes fra UV-fotoner til 2 fotoner med lavere frekvens.
How to entangle photons:
http://physicsweb.org/articles/world/11/3/9/1/world-11-3-9-3
mvh/Glenn
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