That sounds like the field of energy harvesting [1], specifically the "ambient radiation sources" category [2]. The page is ... not short, more people have bee

That sounds like the field of energy harvesting [1], specifically the "ambient radiation sources" category [2]. The page is ... not short, more people have been thinking about this! [1]: https://en.wikipedia.org/wiki/Energy_harvesting https://en.wikipedia.org/wiki/Energy_harvesting [2]: https://en.wikipedia.org/wiki/Energy_harvesting#Ambient-radiation_sources https://en.wikipedia.org/wiki/Energy_harvesting#Ambient-radi...