Erasable electric fields written by laser light onto crystal surfaces can trap, align, and release living cells without electrodes or physical contact. (Nanowerk Spotlight) All human cells possess ...

A micrometer-sized liquid crystal droplet doped with fluorescent dye functions as a nanosecond optical switch that controls light output using light alone. The resonant cavity design cuts the energy ...

Controlling light with light is a long-sought goal for computing and communication technologies. Achieving this capability would allow optical signals to be processed without converting them into ...