Ultrafast third-order optical nonlinearity of several sandwich-type phthalocyaninato and porphyrinato europium complexes

doi:10.1088/1009-1963/14/11/014

Abstract

Abstract The third-order optical nonlinearity of two sandwich-type phthalocyaninato and porphyrinato europium complexes, including double- and triple-deckers Eu[Pc(OC₅H₁₁)₈]₂, Eu₂(Pc)(TPP)₂, Pc=phthalocyanine, TPP=5, 10, 15, 20- tetraphenylporphyrinate), was investigated by using the femtosecond time-resolved optical Kerr gate method at 830 nm wavelength. Their second-order hyperpolarizability is estimated to be 0.74×10^-30esu and 3.0×10^-30esu respectively. This exhibits an evident enhancement in comparison with 0.47×10^-30esu for one-decker Eu(Pc)(acac) (acac=acetylacetonate), which is also measured under the same conditions. The enhancement is attributed to the introduction of lanthanide metal to the large \pi -conjugated system, intermacrocycle interaction and two-photon resonance etc.

Keywords: ultrafast third-order optical nonlinearity phthalocyanine porphyrin

Received: 04 March 2005
Revised: 11 April 2005
Accepted manuscript online:

PACS:	42.65.An	(Optical susceptibility, hyperpolarizability)
	42.65.Hw	(Phase conjugation; photorefractive and Kerr effects)
	78.40.Me	(Organic compounds and polymers)
	78.20.-e	(Optical properties of bulk materials and thin films)

Fund: Project supported by the National Key Research Program of China (Grant No TG1999075209) and the National Natural Science Foundation of China (Grant Nos 10434020, 90206003 and 60378012).

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Huang Wen-Tao (黄文涛), Li Yan (李焱), Xiang Hong (向红), Yang Hong (杨宏), Gong Qi-Huang (龚旗煌), Huang Yan-Yi (黄岩谊), Huang Chun-Hui (黄春辉), Jiang Jian-Zhuang (姜建壮) Ultrafast third-order optical nonlinearity of several sandwich-type phthalocyaninato and porphyrinato europium complexes 2005 Chinese Physics 14 2226

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Ultrafast third-order optical nonlinearity of several sandwich-type phthalocyaninato and porphyrinato europium complexes

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