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Optical Rectennas Show Aptitude in Waste Heat Capture

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BOULDER, Colo., May 27, 2021 — Researchers from the University of Colorado Boulder have developed optical rectennas (short for “rectifying antennas”) capable of capturing excess heat and turning it into usable electricity. The optical rectennas are too small to see with the naked eye and roughly 100× more efficient than similar tools used for energy harvesting. The devices achieve their high level of efficiency through the process of resonant tunneling, in which electrons pass through solid matter without spending energy. Amina Belkadi, the lead author of a paper describing the research, compared...Read full article

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