The theory and experiment of solute migration caused by excited state absorptions

doi:10.1088/1674-1056/19/1/014217

中国物理B ›› 2010, Vol. 19 ›› Issue (1): 14217-014217.doi: 10.1088/1674-1056/19/1/014217

The theory and experiment of solute migration caused by excited state absorptions

王玉晓¹, 税敏¹, 李常伟¹, 杨俊义¹, 张学如¹, 杨昆¹, 金肖², 宋瑛林²

(1)Department of Physics, Harbin Institute of Technology, Harbin 150001, China; (2)Department of Physics, Soochow University, Soochow 215006, China;Department of Physics, Harbin Institute of Technology, Harbin 150001, China

收稿日期:2009-03-03 修回日期:2009-07-02 出版日期:2010-01-15 发布日期:2010-01-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 10104007), the Program for New Century Excellent Talents in University, China (Grant No. NCET-04-0333), and the Excellent Youth Fund of Heilongjiang Province, China (Grant No. JC-04-04).

The theory and experiment of solute migration caused by excited state absorptions

Jin Xiao(金肖)^a)b), Wang Yu-Xiao(王玉晓)^b), Shui Min(税敏)^b), Li Chang-Wei(李常伟)^b),Yang Jun-Yi(杨俊义)^b), Zhang Xue-Ru(张学如)^b),Yang Kun(杨昆)^b), and Song Ying-Lin(宋瑛林)^a)b)^†

^a Department of Physics, Soochow University, Soochow 215006, China; ^b Department of Physics, Harbin Institute of Technology, Harbin 150001, China

Received:2009-03-03 Revised:2009-07-02 Online:2010-01-15 Published:2010-01-15
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 10104007), the Program for New Century Excellent Talents in University, China (Grant No. NCET-04-0333), and the Excellent Youth Fund of Heilongjiang Province, China (Grant No. JC-04-04).

摘要/Abstract

摘要： Nonsymmetrical transition from reverse-saturable absorption (RSA) to saturable absorption (SA) caused by excited state absorption induced mass transport of the CuPcTs dissolved in dimethyl sulfoxide is observed in an open aperture Z-scan experiment with a 21-ps laser pulse. The nonsymmetrical transition from RSA to SA is ascribed neither to saturation of excited state absorption nor to thermal induced mass transport, the so-called Soret effect. In our consideration, strong nonlinear absorption causes the rapid accumulation of the non-uniform kinetic energy of the solute molecules. The non-uniform kinetic field in turn causes the migration of the solute molecules. Additionally, an energy-gradient-induced mass transport theory is presented to interpret the experimental results, and the theoretical calculations are also taken to fit our experimental results.

Abstract: Nonsymmetrical transition from reverse-saturable absorption (RSA) to saturable absorption (SA) caused by excited state absorption induced mass transport of the CuPcTs dissolved in dimethyl sulfoxide is observed in an open aperture Z-scan experiment with a 21-ps laser pulse. The nonsymmetrical transition from RSA to SA is ascribed neither to saturation of excited state absorption nor to thermal induced mass transport, the so-called Soret effect. In our consideration, strong nonlinear absorption causes the rapid accumulation of the non-uniform kinetic energy of the solute molecules. The non-uniform kinetic field in turn causes the migration of the solute molecules. Additionally, an energy-gradient-induced mass transport theory is presented to interpret the experimental results, and the theoretical calculations are also taken to fit our experimental results.

Key words: solute migration, excited state absorption, energy-gradient

中图分类号: (Diffusion and thermal diffusion)

66.10.C-

42.65.-k (Nonlinear optics)

金肖, 王玉晓, 税敏, 李常伟, 杨俊义, 张学如, 杨昆, 宋瑛林. The theory and experiment of solute migration caused by excited state absorptions[J]. 中国物理B, 2010, 19(1): 14217-014217.

Jin Xiao(金肖), Wang Yu-Xiao(王玉晓), Shui Min(税敏), Li Chang-Wei(李常伟),Yang Jun-Yi(杨俊义), Zhang Xue-Ru(张学如),Yang Kun(杨昆), and Song Ying-Lin(宋瑛林). The theory and experiment of solute migration caused by excited state absorptions[J]. Chin. Phys. B, 2010, 19(1): 14217-014217.

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The theory and experiment of solute migration caused by excited state absorptions

The theory and experiment of solute migration caused by excited state absorptions

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