Thermal-lens study of photochemical reaction kinetics

被引：36

作者：

Astrath, Nelson G. C. ^{[1
]}

Astrath, Francine B. G. ^{[1
]}

Shen, Jun

Zhou, Jianqin ^{[1
]}

Michaelian, Kirk H. ^{[2
]}

Fairbridge, Craig ^{[2
]}

Malacarne, Luis C. ^{[3
]}

Pedreira, Paulo R. B. ^{[3
]}

Medina, A. N. ^{[3
]}

Baesso, Mauro L. ^{[3
]}

机构：

[1] Inst Fuel Cell Innovat, Natl Res Council Canada, Vancouver, BC V6T 1W5, Canada

[2] Nat Resources Canada, CanmetENERGY, Devon, AB T9G 1A8, Canada

[3] Univ Estadual Maringa, Dept Fis, BR-87020900 Maringa, Parana, Brazil

来源：

OPTICS LETTERS | 2009年 / 34卷 / 22期

关键词：

D O I：

10.1364/OL.34.003460

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We consider the time dependence of the absorption coefficient due to the photoinduced chemical reaction (PCR) and species diffusion to calculate the temperature rise in the thermal-lens (TL) effect. The TL signal at the detector plane is also calculated. This theoretical approach removes the restriction that the PCR time constant is much greater than the characteristic TL time constant, which was assumed in a previously published model. Hydrocarbon fuel and aqueous Cr(VI) samples are investigated, and quantitative experimental results for the thermal, optical, and PCR properties are obtained. While similar results were obtained for the Cr(VI) solution using the previous and present models, the relative difference between the PCR time constants extracted from the same experimental data for a hydrocarbon fuel sample is found to be more than 220%. This demonstrates the significant difference of the two models. (C) 2009 Optical Society of America

引用

页码：3460 / 3462

页数：3

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