The research team that announced the first optical rectenna in 2015 is now reporting a two-fold efficiency improvement in the devices — and a switch to air-stable diode materials. The improvements could allow the rectennas — which convert electromagnetic fields at optical frequencies directly to electrical current — to operate low-power devices such as temperature sensors.

Via:: http://feeds.sciencedaily.com/~r/sciencedaily/matter_energy/nanotechnology/~3/9dMC1Dczpf0/180126110033.htm

Research boosts efficiency and stability of optical rectennas

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