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Invisiblecortex
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Electromagnetic 'black hole' formed in labratory
    #11315951 - 10/25/09 02:42 AM (8 years, 1 month ago)

Popular Science did an article on this that was pretty entertaining:

Quote:

Just because most black holes are solar-system-sized maelstroms with reality-warping gravitational pulls doesn't mean you can't have one in your pocket! That's right, just in time for the holidays comes the pocket black hole. Designed by scientists at the Southeast University in Nanjing, China, this eight-and-a-half-inch-wide disk absorbs all the electromagnetic radiation you throw at it, with none of the pesky time dilation and Hawking radiation associated with the larger, interstellar versions.

Unlike a regular black hole, which traps light using the gravitational pull of the dead star at its core, this simple metal disc uses the geometry of 60 concentric rings of metamaterials to lock up light for good. The metamaterial "resonators" that make up the rings affect the magnetic properties of passing light, bending the beams into the center of the disc, and trapping them in the etched maze-like grooves.

But wait, there's more! These discs don't destroy the energy of the trapped light, and emit heat when trapping ambient radiation. That means these metamaterial black holes could serve as the basis for solar panels that capture every wavelength of the electromagnetic spectrum. And do so near-perfectly, to boot.

Call now! Operators are standing by.*





Here is the original paper:


Quote:

Traditionally, a black hole is a region of space with huge gravitational field
in the means of general relativity, which absorbs everything hitting it including
the light. In general relativity, the presence of matter-energy densities results in
the motion of matter propagating in a curved spacetime1, which is similar to the
electromagnetic-wave propagation in a curved space and in an inhomogeneous
metamaterial2. Hence one can simulate the black hole using electromagnetic
fields and metamaterials. In a recent theoretical work, an optical black hole
has been proposed based on metamaterials, in which the numerical simulations
showed a highly efficient light absorption3. Here we report the first experimen-
tal demonstration of electromagnetic black hole in the microwave frequencies.
The proposed black hole is composed of non-resonant and resonant metamaterial
structures, which can absorb electromagnetic waves efficiently coming from all
directions due to the local control of electromagnetic fields. Hence the electro-
magnetic black hole could be used as the thermal emitting source and to harvest
the solar light.




[ link ]

Anybody else see this?


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Invisibleelementswrath
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Re: Electromagnetic 'black hole' formed in labratory [Re: cortex]
    #11315968 - 10/25/09 02:46 AM (8 years, 1 month ago)

LOL


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OfflineDeekay
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Re: Electromagnetic 'black hole' formed in labratory [Re: elementswrath]
    #11317785 - 10/25/09 01:13 PM (8 years, 1 month ago)

:facepalm: wtf


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InvisibleThirdEyeOpening
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Re: Electromagnetic 'black hole' formed in labratory [Re: cortex]
    #11319453 - 10/25/09 06:10 PM (8 years, 1 month ago)

Quote:

But wait, there's more! These discs don't destroy the energy of the trapped light, and emit heat when trapping ambient radiation. That means these metamaterial black holes could serve as the basis for solar panels that capture every wavelength of the electromagnetic spectrum. And do so near-perfectly, to boot.




If this is true, then this is truly revolutionary.

Turning ambient light into heat would have near endless uses.


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OfflineAsanteA
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Re: Electromagnetic 'black hole' formed in labratory [Re: cortex]
    #11344339 - 10/29/09 12:12 PM (8 years, 1 month ago)



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OfflineSprezzatura
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Re: Electromagnetic 'black hole' formed in labratory [Re: Asante]
    #11345591 - 10/29/09 04:08 PM (8 years, 1 month ago)

I was watching something a few months ago about Super-Massive Black Holes and how they're not only present in every galaxy, but most likely responsible for the creation of galaxies.

Seems pretty elementary to me; I thought that was already well-known years ago.


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