Vibrationally enhanced four-wave mixing in 1,8-nonadiyne

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• 作者：LaBuda ; Mitchell J. ; Wright ; John C.
• 刊名：Chemical Physics Letters
• 出版年：1998
• 出版时间：June 26, 1998
• 年：1998
• 卷：290
• 期：1-3
• 页码：29-35
• 全文大小：173 K

文摘

The vibrationally enhanced third-order nonlinear optical susceptibility, χ⁽³⁾, of the acetylenic C–H stretch of 1,8-nonadiyne is measured using infrared four-wave mixing spectroscopy. Two tunable infrared and a visible laser generate four-wave mixing by a nonparametric process that is enhanced by the infrared absorption. The measurement uses the lineshape changes caused by interference between a coherent anti-Stokes Raman process and the nonparametric infrared four-wave mixing. The vibrational enhancement is 7-times larger than the nonresonant electronic χ⁽³⁾. This enhancement is sufficient for achieving multiresonant infrared four-wave mixing with vibrational resonances.