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Laser cooling of solids to cryogenic temperatures.

Author(s) : SELETSKIY D. V., MELGAARD S. D., BIGOTTA S., et al.

Type of article: Article

Summary

In this Letter, the authors report laser cooling of ytterbium-doped LiYF4 crystal to a temperature of ~155 K starting from ambient, with a cooling power of 90 mW. This is achieved by making use of the Stark manifold resonance in a crystalline host, and demonstrates the lowest temperature achieved to date without the use of cryogens or mechanical refrigeration. Optical refrigeration has entered the cryogenic regime, surpassing the performance of multi-stage Peltier coolers.

Details

  • Original title: Laser cooling of solids to cryogenic temperatures.
  • Record ID : 30002496
  • Languages: English
  • Source: Nature Photonics - n. 4
  • Publication date: 2010
  • DOI: http://dx.doi.org/10.1038/nphoton.2009.269

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