Possibility of Optical Cooling of Ruby
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概要
- 論文の詳細を見る
The possibility of cooling by an optical process of ruby is pointed out. When C^<3+> ions in ruby are optically pumped by photons with a given energy and emit photons with higher energies, the lattice energy can be extracted as light, so that a cooling effect appears. If some possible heating effects did not overcome this cooling effect, the temperature would be actually reduced. Cooling rates and cooling capacities are given. If we could have light input powers 10^<-1> Watt or 10^<-2> Watt for optical pumping, it might be possible to cool from 80°K or 20°K to temperatures below 1°K, respectively. Technical problems and possible heating effects are discussed.
- 東北大学の論文
著者
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Tsujikawa Ikuji
The Research Institute For Iron Steel And Other Metals
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MURAO Tsuyoshi
The Research Institute of Electrical Communication, Tohoku University
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Murao Tsuyoshi
The Research Institute Of Electrical Communication Tohoku University
関連論文
- Absorption Spectrum of Crystals at Low Temperatures. I : The Effect of Temperature on Spectrum of Benzene and its Monoderivatives
- Fluorescence Spectra of Cuprous Halides at Low Temperatures
- Absorption Lines of Manganous Acetate Tetrahydrate
- Absorption Lines of Manganous Fluosilicate Haxahydrate
- Spectroscopic Studies of the Ordered State of the Manganous Halide Tetrahydrates
- Absorption Lines of Manganous Acetate Tetrahydrate
- Absorption Lines of Manganous Fluosilicate Hexahydrate
- Spectroscopic Studies of the Ordered State of the Manganous Halide Tetrahydrates.
- A Note on the Paper, "The Absorption Spectrum of Crystals at Low Temperatures. I"
- Possibility of Optical Cooling of Ruby
- Absorption Spectrum of Crystals at Low Temperatures. II : Analysis of Absorption Spectrum of Naphthalene Crystal
- Absorption and Fluorescence Spectra of Anthracence, Phenanthrene and Chrysene at Low Temperatures
- Absorption Lines in the Antiferromagnetic States of MnCl_2・4H_2O and MnBr_2・4H_2O