Electroabsorption in C60 and C70. Third-order nonlinearity in molecular and solid states
作者： Bret C. Hess , Don V. Bowersox , Shant H. Mardirosian , Lawrence D. Unterberger
DOI: 10.1016/0009-2614(95)01286-9
关键词: Coupling 、 Molecule 、 Third order nonlinearity 、 Vibronic coupling 、 Computational chemistry 、 Chemistry 、 Molecular physics 、 Intermolecular force 、 Degenerate energy levels 、 Mixing (physics) 、 Spectral line
摘要: Abstract We have studied electroabsorption (EA) in both films and disperssed molecules of C 60 70 . In contrast to a recent model for the third harmonic generation (THG) spectrum, we find that two-photon states important nonresonant χ (3) (0) molecular are above 3.6 eV T 1u state, not below it. present consistent with spectra EA, THG degenerate four-wave mixing (DFWM). The lowest-energy resonances ( ω ) dominated by ‘forbidden’ transitions made allowed vibronic coupling molecule intermolecular solid.
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