作者: Jeffrey S. Meth , Herman Vanherzeele , Ying Wang
DOI: 10.1016/0009-2614(92)86016-B
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摘要: Abstract We report the |χ (3) (−3ω; ω, ω)| of a thin film polycrystalline C 60 on glass measured over fundamental energy range 0.52–1.18 eV. The dispersion clearly shows three-photon resonance at ħω=0.94 eV, whose third-harmonic corresponds to dipole allowed transition 2.8 eV in solid . can be fit by two-level model, and good correlation exists between nonlinearity linear optical absorption spectrum. Away from resonance, = (4.1 ± 0.6) × 10 −12 esu, while peak, (2.7 0.4) −11 esu.