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Cooperative second harmonic laser light scattering in liquid cyclohexane, benzene and carbon disulphide
Author(s) -
Kielich S.,
Lalanne J. R.,
Martin F. B.
Publication year - 1973
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250010202
Subject(s) - cyclohexane , benzene , anisotropy , molecular physics , molecule , chemistry , scattering , light scattering , laser , molecular symmetry , symmetry (geometry) , rayleigh scattering , carbon fibers , raman scattering , chemical physics , optics , materials science , raman spectroscopy , physics , organic chemistry , geometry , mathematics , composite number , composite material
Using a Q ‐switched Nd: glass laser with a high transmission optical system, first measurements of cooperative second harmonic light scattering (SHLS) in liquid cyclohexane, benzene and carbon disulphide were performed. Molecular‐statistical theory is extended to show that cooperative SHLS by liquids consisting of centro‐symmetric molecules is due to a lowering of their symmetry by the time and space fluctuating electric field of the quadrupoles and hexadecapoles of near neighbouring molecules. Also, the rôle of angular molecular correlations as well as of anisotropy in third‐order nonlinear polarisability of the scattering molecules is discussed.