Chiral metasurfaces can strongly twist the polarization of light, but how this process unfolds in space and time has been unclear. Scientists in China have now used ultrafast electron microscopy and ...

An electromagnetic wave or signal traveling from “here” to “there” has an electrostatic field component that we call its E-field and whose direction we assign as the signal’s polarity. Often, the ...

This “heterostructure” consists of a stack of multiple different thin films, including a collection of aligned carbon nanotubes with different orientations. Credit: University of Utah This ...

Butterflies can see more of the world than humans, including more colors and the field oscillation direction, or polarization, of light. This special ability enables them to navigate with precision, ...

Integrating the exotic world of topological magnetism with practical semiconductor technology has been a grand challenge. Two key obstacles are the difficulty in stabilizing topological spin textures ...

The challenges of fabricating micromotors and geartrains with comparable size to a human cell. The problems of powering such motors. How metasurfaces allow projected laser output to power these ...