Optical method of stimulation of the second sound in superfluid helium

A method of excitation of the second sound in superfluid helium with the help of modulated laser radiation is suggested. The optical wavelengths are of the order of 60 nm which corresponds to the region of absorption in helium. The time dependence of the temperature is calculated for different ways...

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Bibliographic Details
Published in:Physics letters. A 1991-12, Vol.161 (2), p.161-163
Main Authors: Romanov, Vadim Petrovich, Salikhov, Tagaimurod Khaitovich
Format: Article
Language:English
Subjects:
Boson degeneracy and superfluidity of 4he
Condensed matter: structure, mechanical and thermal properties
Exact sciences and technology
Physics
Quantum fluids and solids
liquid and solid helium
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Summary:A method of excitation of the second sound in superfluid helium with the help of modulated laser radiation is suggested. The optical wavelengths are of the order of 60 nm which corresponds to the region of absorption in helium. The time dependence of the temperature is calculated for different ways of variation of the radiation intensity. It is shown that for realistic values of the parameters the amplitude of the second sounds is quite measurable experimentally.
ISSN:0375-9601
1873-2429
DOI:10.1016/0375-9601(92)90769-I