Two-photon absorption in organic dyes — Relation with the symmetry of the levels |
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Authors: | B Foucault JP Hermann |
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Institution: | Laboratoire d''Optique Quantique, C.N.R.S., Ecole Polytechnique, 91120 Palaiseau, France |
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Abstract: | We studied two-photon absorption in a number of organic dyes and found that the two-photon cross-section does not follow Schäfer-Schmidt's rule. We found that the ratio δω/σ2ω is a function of the difference between the peak absorption frequency and twice the laser frequency, ωmax - 2ωL. We pointed out the importance of the symmetry of the energy levels by studying three families of dyes. |
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