Optical rectenna for power generation from waste heat

“Still, the conversion efficiencies of these new rectennas remains small—just 0.001%.”.

Same guys as Optical Cavity Induced Current

References

1. https://physicsworld.com/a/efficient-optical-rectenna-could-generate-power-from-waste-heat/
2. https://www.nature.com/articles/s41467-021-23182-0