Twisted
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Physics
Twisted Light: A new metasurface offers a compact solution for circularly polarized light
Generation of circularly polarized nonlinear signals from rotationally symmetric chiral metasurfaces under arbitrary polarization excitation. Credit: SUTD Left and right circularly polarized light, in which electromagnetic waves spiral clockwise and counterclockwise, plays an important role in a wide range of applications, from enhancing medical imaging technology to enabling advanced communication technologies. However, generating circularly polarized light often requires complex and…
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Nanotechnology
‘Twisted’ 2D materials exhibit unexpected electronic behavior that defies theoretical predictions
This photo shows first author Giovanna Feraco (Zernike Institute for Advanced Materials, University of Groningen, Netherlands) operating an ultra-high vacuum (UHV) system at the synchrotron facility. Credit: University of Groningen In search of new materials that will enable more efficient electronics, scientists are researching so-called 2D materials. These are sheets just one atom thick and can have all sorts of…
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Physics
Twisted Edison: A nanoscale curled filament produces light waves that rotate as they travel.
The light bulb’s Edison-style filament is twisted on a microscale, similar to the strands Jun Lu holds next to the demonstration. When the length of each twist matches the wavelength of the light emitted by the filament, the light waves rotate as they travel through space. Credit: Brenda Ahearn/Michigan Engineering Bright, twisted light can be produced using technology similar to…
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