Scientists debut most efficient 'optical rectennas,' devices that harvest power from heat

For decades, researchers have theorized that 'optical rectennas' could sit on everything from bakery ovens to dirigibles flying high above Earth to harvest waste heat and turn it into electricity. But to date, those goals have remained elusive. Now, engineers have unveiled a highly efficient optical rectenna.

from Top Technology News -- ScienceDaily https://ift.tt/3hCa3uG