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 Cr^<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.

• 社団法人日本物理学会の論文
• 1963-04-05

著者

• MURAO Tsuyoshi

  Research Institute of Electrical Communication Tohoku University

• Tsujikawa Ikuji

  Research Institute For Iron Steel And Other Metals Tohoku University

• Murao Tsuyoshi

  Research Institute Of Electrical Communication Tohoku University:institute For Atomic Research Iowa

• Tsujikawa I.

  Research Institute for Iron, Steel and Other Metals, Tohoku University

関連論文

• Sharp Absorption Lines of V^3+-Al_2O_3 in the Near Infrared Region
• Faraday Effect for Localized Electrons in Insulators
• Absorption Spectra of Cr^ in Al_2O_3 : Part B. Experimental Studies of the Zeeman Effect and Other Properties of the Line Spectra
• Anomalous g-shifts of Excited States of Cr^ in Ruby
• Possibility of Optical Cooling of Ruby
• Screening of Multipolar Interactions in Metals

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