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Vantabubble

 Vanta black with negative detail, done with a bubble wrap like structure
 
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If bubble wrap could be made solid then an open window could be cut in the top of each bubble . If the top and bottom layer was painted with Vanta black then light would have the added loss of bouncing around in side the bubble.

Size of black bubble pixel relative to window size would matter. Internal walls between vanta's could be clear to allow incoming light to hit lower Vanta black.

It could even be a multiple level photon parking construction.

—wjt, Dec 14 2018

Perfect black https://youtu.be/JoLEIiza9Bc
Exactly this experiment, done. [RayfordSteele, Dec 15 2018]

toffee recipe https://bearingdrif...ee-for-christmas-2/
[Voice, Dec 17 2018]

Nature there first https://www.physics...dden-structure.html
Not quite a bubble but 3D. [wjt, Mar 26 2020]

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       // photon parking construction //   

       Eh ? What you've designed is a fractal-like black-body absorber with an increased surface area.   

       Car park: cars go in, stay a while, cars go out.   

       Absorber: photons go in, absorber gets hotter. Nothing comes out until the absorber equilibrates with incident radiation.
—8th of 7, Dec 14 2018
   

       Would fractalizing a Vantablack surface actually make it darker? Instinctively, I'd say not - the surface is already "rough" at what is presumably the optimal length scale for absorbing light. My guess is that for every photon that is trapped because of the large-scale geometry of the surface (ie, in your bubble-wrap), another photon that would have been trapped will instead be reflected, with the net result of no effect.
—MaxwellBuchanan, Dec 14 2018
   

       Making the layer thicker though, must give more space for photon trapping geometry. Wouldn't the .035% photons, missing the Vanta black, be hitting the backing material? Trying to minimise this backing material by an open gap to another Vanta black layer would catch another fraction of these photons. Ooh, possibly aerogel Vanta black.   

       Having another layer could then shield whatever mechanism you want to dump this incoming energy. Having a greater capacity , at the cost of dimensional space, means there is a time differential of parking cars versus time to crush them and truck them away.
—wjt, Dec 15 2018
   

       Thought experiment: leaving aside the vanta part, would black honeycomb be darker than black slab toffee?
—pertinax, Dec 15 2018
   

       Of course it would, because black slab toffee is hollow, goes on forever, and it's full of stars.
—8th of 7, Dec 15 2018
   

       Check the link. Watch all the way to the end.   

       Waiting for vantachocolate to show up...
—RayfordSteele, Dec 15 2018
   

       Less fattening than toffee, certainly.
—8th of 7, Dec 16 2018
   

       More nature, showing us up. see link.
—wjt, Mar 26 2020
   

       I guess I don't understand what the goal is here. An even blacker surface, achieved by adding small holes leading into a black interior?
—sninctown, Mar 26 2020
   

       Vantablack is a thin layer of nanotubes, The idea was for a larger 3D structure with voids in the Vantablack, to be 'blacker'. Not unlike this newly discovered insect wing.
—wjt, Mar 27 2020
   


 

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