very cool stuff

[Roger Critchlow-2]

  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 --

============================================================
FRIAM Applied Complexity Group listserv
Meets Fridays 9a-11:30 at cafe at St. John's College
to unsubscribe http://redfish.com/mailman/listinfo/friam_redfish.com
FRIAM-COMIC http://friam-comic.blogspot.com/ by Dr. Strangelove

[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 <[hidden email]> 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 --

============================================================
FRIAM Applied Complexity Group listserv
Meets Fridays 9a-11:30 at cafe at St. John's College
to unsubscribe http://redfish.com/mailman/listinfo/friam_redfish.com
FRIAM-COMIC http://friam-comic.blogspot.com/ by Dr. Strangelove

============================================================
FRIAM Applied Complexity Group listserv
Meets Fridays 9a-11:30 at cafe at St. John's College
to unsubscribe http://redfish.com/mailman/listinfo/friam_redfish.com
FRIAM-COMIC http://friam-comic.blogspot.com/ by Dr. Strangelove