Trading power-hungry lasers for sunlight is a first step toward sustainable quantum tech.
the device uses sunlight. It doesn’t use solar cells to convert light into electricity. Instead, the sunlight does the job of the laser’s light, says Jiangfeng Du, a physicist at the University of Science and Technology of China in Hefei.
. The defects result when nitrogen atoms replace some of the carbon atoms that pure diamonds are made of. The green laser causes the nitrogen defects to fluoresce, emitting red light with an intensity that depends on the strength of the surrounding magnetic fields. Green-colored light shining on the diamond-based sensor in a quantum device can be used to measure magnetic fields. In this prototype, a lens collects sunlight, which is filtered to leave only green wavelengths of light. That green light provides an environmentally friendly alternative to the light created by power-hungry lasers that conventional quantum devices rely on.
“I’ve never seen any other reports that connect solar research to quantum technologies,” says Yen-Hung Lin, a physicist at the University of Oxford who was not involved with the study. “It might well ignite a spark of interest in this unexplored direction, and we could see more interdisciplinary research in the field of energy.”
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