First optical rectenna that converts light to DC current

A team of engineers, including Indian-origin researchers, has demonstrated the world's first optical rectenna - a device that combines the functions of an antenna and a rectifier diode to convert light directly into DC current.

2-D devices may soon be a reality

The materials at play – graphene and hexagonal boron nitride – have been merged into sheets and built into a variety of patterns at nanoscale dimensions.