Measurement of the resonant third-order nonlinear susceptibility of C60 by nondegenerate four-wave mixing

✍ Scribed by Lei Geng; John C. Wright

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 554 KB
• Volume: 249
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(95)01318-0

✦ Synopsis

Ten orders of magnitude discrepancy exists in the literature for the third-order nonlinear susceptibilities of C6o. To elucidate the problem, we used four-wave mixing to measure the resonant nonlinear optical response to C6o by fitting the line-shapes resulting from interference between a standard and sample. High accuracy is achieved because absolute intensity measurements are not necessary. The measurements show the nonlinearity is much lower and can only constrain the C6o second-order molecular hyperpolarizability to 3.7 × 10 -35 esu. This limit is only 57 × as high as that of benzene and is lower than any value reported in the literature.