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Tunable Quantum Counter For Far-Infrared Radiation

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Lengfellner, Hans ; Pauli, G. ; Heisel, W. ; Renk, Karl Friedrich
Date of publication of this fulltext: 08 Dec 2010 07:25


We report on a quantum counter which converts far‐infrared radiation to visible light. The 891‐Ghz radiation of an HCN laser, absorbed in optically pumped ruby by the transition Ē (2E) →2Ā (2E), was detected by an increased R2 fluorescence. By Zeeman splitting of the 2E levels the narrow‐band detector was tuned to the laser line.

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