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1 May 2012 Laser cooling with Tm3+-doped nano-crystals of oxy-fluoride glass ceramic
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A theoretical scheme for laser cooling in Tm3+-doped oxy-fluoride glass ceramic (GC) is presented. It is shown that the unique combination of high chemical and mechanical stability of the oxide glass and low phonon energy of the fluoride nano-crystals, which trap a majority of Tm3+ ions, is beneficial for laser cooling of solids. The effective embedding of rare-earth ions in the crystalline phase with low phonon energy provides high quantum efficiency for the 3F43H6 transition involved in the cooling cycle in the Tm3+ ions, which is a key parameter for laser cooling of solids.
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Galina Nemova and Raman Kashyap "Laser cooling with Tm3+-doped nano-crystals of oxy-fluoride glass ceramic", Proc. SPIE 8424, Nanophotonics IV, 84242I (1 May 2012);


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