The idea that this method could be of practical interest sounds like bullshit hype. Don't be another sucker for bogus science hype (born every minute). Because you need like 1 blue photon per molecule, and if even a tiny fraction of those photons, like 1%, get wasted/lost, that'd be hugely inefficient. And.. sure enough, looking at the paper they are using megawatt per cm^2 irradiance levels for their "refrigerator." My god.
It's true that lasers are often used as heating implements, but a less common use is the cooling of gases and crystals. Now for the first time, a team of researchers has now used an infrared laser to cool liquid by about 20 degrees Celsius (36 degrees Fahrenheit).
The study, led by Paden Roder of the University of Washington, has been published in the Proceedings of the National Academy of Sciences, and can be viewed on arXiv.
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