Circa 2015
Researchers have used an infrared laser to cool water by about 2°C (36°F) — a major breakthrough in the field. As they are cooled by the laser, the nanocrystals developed by the University of Washington team emit a reddish-green ‘glow’ (shown) that can be seen by the naked eye.
‘Typically, when you go to the movies and see Star Wars laser blasters, they heat things up’, senior author and assistant professor of materials science and engineering at the University of Washington Peter Pauzauskie explained.
‘It was really an open question as to whether this could be done because normally water warms when illuminated.’
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