Two-photon spectra of C60 and C70 films between 0.74 and 1.7 um

Friedrich P. Strohkendl; Theresa J. Axenson; R. J. Larsen; Larry Raymond Dalton; Robert W. Hellwarth; Zakya H. Kafafi

doi:10.1117/12.293358

1 November 1997 Two-photon spectra of C₆₀ and C₇₀ films between 0.74 and 1.7 μm

Friedrich P. Strohkendl, Theresa J. Axenson, R. J. Larsen, Larry Raymond Dalton, Robert W. Hellwarth, Zakya H. Kafafi

Proceedings Volume 3142, Fullerenes and Photonics IV; (1997) https://doi.org/10.1117/12.293358
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

We present new femtosecond degenerate four-wave (DFWM) measurements on a C₇₀ film in the wavelength range 0.9- 1.6 micrometers in conjunction with previously measured data in C₆₀ and C₇₀ in the ranges 0.74-1.7 (mu) and 0.74-0.88 micrometers , respectively. The new data reveal tow closely spaced peaks in the DFWM spectrum which we interpret as two-photon states with excitation energies of 2.41 +/- 0.05 eV and 2.64 +/- 0.03 eV. We relate these results to nonlinear optical spectra obtained by others in C₆₀ and C₇₀ films. In particular, we compare third-harmonic generation, electro-absorption and DFWM and emphasize the relative advantages of DFWM for two-photon spectroscopy.

Citation Download Citation

Friedrich P. Strohkendl, Theresa J. Axenson, R. J. Larsen, Larry Raymond Dalton, Robert W. Hellwarth, and Zakya H. Kafafi "Two-photon spectra of C₆₀ and C₇₀ films between 0.74 and 1.7 μm", Proc. SPIE 3142, Fullerenes and Photonics IV, (1 November 1997); https://doi.org/10.1117/12.293358

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