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New type Anti-Stokes laser cooling materials: Yb:LiLuF4 crystal

Jigang Yin ,  Guangzhu Chen ,  Zhe Chen ,  Yin Hang ,  Kaijie Ning ,  Xiangyong Wang ,  LianHan Zhang ,  Peixiong Zhang 

Shanghai Institute of Optics and Fine Mechanics China Academy of Sciences, Shanghai 201800, China


Optical irradiation accompanied by spontaneous anti-Stokes emission can lead to cooling of matter, in a phenomenon known as laser cooling, or optical refrigeration, which was proposed by Pringsheim in 1929. Recently, cooling of a high-density gas through collision redistribution of radiation has been demonstrated. In laser cooling of solids, heat is removed through the annihilation of lattice vibrations in the process of anti-Stokes fluorescence. Since its initial observation in 1995, research has led to achieving a temperature of 208 K in ytterbium-doped glass. In this Letter, we report Anti- Stokes laser cooling in ytterbium-doped LiLuF4 single crystals grown using the Czochralski technique. The spectroscopic characterization of the crystals has been used to evaluate the laser cooling performance of the samples. Cooling by 6 degrees below ambient temperature is obtained.


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Related papers

Presentation: Oral at 17th International Conference on Crystal Growth and Epitaxy - ICCGE-17, Topical Session 6, by Jigang Yin
See On-line Journal of 17th International Conference on Crystal Growth and Epitaxy - ICCGE-17

Submitted: 2013-04-15 15:49
Revised:   2013-04-15 15:50