Harvesting solar energy in orbit and beaming it down to Earth is a decades-old idea. Now, a raft of companies say they could ...

A Hawaii-based company has claimed an energy harvesting breakthrough with a device which it says can convert radio frequency (RF) signals into electricity. Infrgy says its prototype device is able to ...

A team of physicists at the University of Warsaw has built the world’s first all-optical radio receiver powered entirely by laser light. The device, developed by researchers from the Faculty of ...