[FRIAM] very cool stuff

[Carl Tollander]

Metamaterials are much neglected in our discussions.
https://phys.org/search/?search=metamaterial

Possibly some thoughts to be had around ABM and 3D printing.

My own favorite metamaterials in the acoustic realm are wood and hides,
which kind of "print" themselves.

Carl


On Thu, Mar 9, 2017 at 12:44 PM, Roger Critchlow <rec at elf.org> wrote:

>
>   http://science.sciencemag.org/content/355/6329/1062.full
>
> reports construction of a metamaterial which is reflective at visible
> wavelengths and transparent at infrared wavelengths.  As a consequence, it
> can form a roof which provides shade from the sun while passively cooling
> the shaded area by IR radiation into space.  It has some aspects of
> Maxwell's demon, but it's distinguishing photos by their energy content,
> sun temperature photons are repelled, room temperature photons are allowed
> to pass.
>
> I don't understand the details of the construction as yet.
>
> -- rec --
>
>
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