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Kleinman symmetry, named after American physicist D.A. Kleinman, gives a method of reducing the number of distinct coefficients in the rank-3 second order nonlinear optical susceptibility when the applied frequencies are much smaller than any resonant frequencies.[1][2]
- ^ Dailey, Christopher A.; Burke, Brian J.; Simpson, Garth J. (2004-05-21). "The general failure of Kleinman symmetry in practical nonlinear optical applications". Chemical Physics Letters. 390 (1): 8–13. Bibcode:2004CPL...390....8D. doi:10.1016/j.cplett.2004.03.109. ISSN 0009-2614.
- ^ Lecture 23: Kleinman's Symmetry, Neumann's Principle, retrieved 2022-02-10