metamaterial   125

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Revolutionary Ultra-Thin 'Meta-Lens' Enables Full-Color Imaging
"The beauty of our flat lens is that by using meta-atoms of complex shapes, it not only provides the correct distribution of delay for a single color of light but also for a continuous spectrum of light," Yu says. "And because they are so thin, they have the potential to drastically reduce the size and weight of any optical instrument or device used for imaging, such as cameras, microscopes, telescopes, and even our eyeglasses. Think of a pair of eyeglasses with a thickness thinner than a sheet of paper, smartphone cameras that do not bulge out, thin patches of imaging and sensing systems for driverless cars and drones, and miniaturized tools for medical imaging applications."
metamaterial  lens  meta-lens  optics 
october 2018 by euler
RIT researcher develops new solar sailing technology for NASA - RIT News
Uh, based on the vectors, this is only going to work really well for an SSO orbit riding the terminator line since you need the solar angle to be normal to the plane of the sail and keep the sail edge-on to the orbital vector...
metamaterial  diffractive  metafilm  solar  sail  cubesate  satellite  space  propulsion  diffraction  optics  materials  science  research  technology 
july 2018 by asteroza
Phys. Rev. X 4, 041033 (2014) - Anisotropic Complementary Acoustic Metamaterial for Canceling out Aberrating Layers
This suggest the possibility of putting a helmet on the head of a person to ultrasound the inside of a skull, which is currently not possible. Which would avoid needing MRI/CT scanning.
metamaterial  ultrasound  materials  science  acoustics  research  technology  medicine  health 
july 2018 by asteroza
[1802.06362] Experimental demonstration of three-dimensional broadband underwater acoustic carpet cloak
The military usefulness is limited for submarine surface coatings, but as a hangar for UUV's that can hide in plain sight, or to cover/shield an underwater cable tap, this has some applications...
metamaterial  underwater  acoustic  cloak  cloaking  shield  UACC 
may 2018 by asteroza
Three-dimensional mechanical metamaterials with a twist | Science
In the classical picture of solid mechanics, deformation in response to stress is constrained owing to limitations on the degrees of freedom. For instance, when you push on a material, you do not expect it to twist in response. Frenzel et al. designed a mechanical metamaterial with a pronounced twist to the left or right when pushed (see the Perspective by Coulais). Designing this type of chirality for a macroscopic material is unexpected, but it points to a more general strategy for developing materials with unusual deformation behavior.
november 2017 by tonyyet

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