16 December 1996 Degenerate four-wave mixing spectrum of C60 between 0.74 and 1.7 um
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We have extended the wavelength range of our previous study of the third order nonlinear optical susceptibility tensor (chi) (3)(-(omega) , (omega) , (omega) , -(omega) ) of a thin C60 film to 1.7 micrometers . We use time-resolved degenerate four-wave-mixing with femtosecond pulses to measure both the phase and magnitude of (chi) 1111. Our data are well defined in terms of a single two-photon resonance at a fundamental wavelength of 930 nm. From our fit parameters, we predict for (chi) 1111 in the zero-frequency limit a value of (9 +/- 3) X 10-13 esu and at the resonance maximum a value of i(3.9 +/- 0.6) X 10-12 esu.
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Friedrich P. Strohkendl, Theresa J. Axenson, Larry Raymond Dalton, Robert W. Hellwarth, H. W. Sarkas, Zakya H. Kafafi, "Degenerate four-wave mixing spectrum of C60 between 0.74 and 1.7 um", Proc. SPIE 2854, Fullerenes and Photonics III, (16 December 1996); doi: 10.1117/12.262990; https://doi.org/10.1117/12.262990

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