Second-order hyperpolarizibilities γ of the buckminsterfullerenes C70 at three different wavelengths were determined by third-harmonic generation in a toluene solution and compared with those of C60. Strong effects with γ exceeding 5 × 10−32 esu were observed in the three-photon resonant regime. The nonresonant measurements indicate a negative real hyperpolarizibility in C70 and a positive γ for C60, both of the order of 10−33 esu.
© 1992 Optical Society of America
Original Manuscript: June 1, 1992
Published: November 1, 1992
D. Neher, F. A. Tinker, N. Peyghambarian, and G. I. Stegeman, "Nonlinear optical response of C60 and C70," Opt. Lett. 17, 1491-1493 (1992)