Multiphoton fluorescence free hyperpolarizabilities of subphthalocyanines

被引:32
作者
Olbrechts, G
Wostyn, K
Clays, K
Persoons, A
Kang, SH
Kim, K
机构
[1] Univ Louvain, Dept Chem, Lab Chem & Biol Dynam, Ctr Res Mol Elect & Photon, B-3001 Louvain, Belgium
[2] Univ Arizona, Ctr Opt Sci, Tucson, AZ 85721 USA
[3] Pohang Univ Sci & Technol, POSTECH, Natl Creat Res Initiat Ctr Smart Supramol, Pohang 790784, South Korea
[4] Pohang Univ Sci & Technol, POSTECH, Dept Chem, Pohang 790784, South Korea
关键词
D O I
10.1016/S0009-2614(99)00608-9
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Subphthalocyanines have potential applications in the field of second-order nonlinear optics. However, multiphoton fluorescence has seriously complicated the accurate retrieval of their molecular first hyperpolarizability beta by hyper-Rayleigh scattering. We report here hyper-Rayleigh scattering results on subphthalocyanines with experimental evidence of effective multiphoton fluorescence suppression. It is demonstrated that multiphoton fluorescence does indeed contribute to the scattering signal but that accurate values for the first hyperpolarizabilities can be deduced when taking this properly into account. More generally, this shows that experimental evidence of the absence of a multiphoton fluorescence contribution to hyper-Rayleigh scattering should be included whenever hyperpolarizability values of fluorescent compounds are reported. (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:173 / 175
页数:3
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