Condensed Matter

   

Metasurface Rotates Polarization

Authors: George Rajna

Researchers at the University of Michigan and City University of New York have recently proposed and experimentally validated a transparent, electronically tunable metasurface. [34] By measuring how the electric current of an ionic fluid is generated by the flow of water through ångström-sized channels, researchers in France and the UK have discovered that this current is sensitive to an electric field when pressure is applied. [33] Devices based on magnonic currents-quasi-particles associated with waves of magnetization, or spin waves, in certain magnetic materials-would transform the industry, though scientists need to better understand how to control them. [32] Such devices would use magnetic films and superconducting thin films to deploy and manipulate magnetic monopoles to sort and store data based on the north or south direction of their poles-analogous to the ones and zeros in conventional magnetic storage devices. [31] The vacuum is filled with quantum fluctuations of the electromagnetic field-virtual photons that pop in and out of existence-that are assumed to behave in the same way. To make the plates repulsive and tunable, Wilczek and Stockholm University colleague Qing-Dong Jiang inserted a material between the plates that breaks this behavior. [30] In terms of physics, the interiors of neutron stars, cold atomic gasses and nuclear systems all have one thing in common: they are gaseous systems made up of highly interactive, superfluid fermions. [29] Engineers at MIT and Penn State University have found that under the right conditions, ordinary clear water droplets on a transparent surface can produce brilliant colors, without the addition of inks or dyes. [28]

Comments: 56 Pages.

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[v1] 2019-03-12 14:49:59

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