Using touchscreens or buttons to control devices isn't always practical, and voice commands may not work in loud environments. A new system offers an alternative, in that it utilizes acoustic waves ...

These devices are the first to demonstrate simultaneous control of all four optical degrees of freedom, namely, amplitude, phase, polarization ellipticity, and polarization orientation--a world record ...

Researchers at Columbia Engineering have developed a new class of integrated photonic devices—"leaky-wave metasurfaces"—that can convert light initially confined in an optical waveguide to an ...