A Quantitative Theory Model of a Photobleaching Mechanism
CHEN Tong-Sheng, ZENG Shao-Qun, ZHOU Wei, LUO Qing-Ming
The Key Laboratory of Biomedical Photonics of Ministry of Education, Huazhong University of Science and Technology, Wuhan 430074
A Quantitative Theory Model of a Photobleaching Mechanism
CHEN Tong-Sheng;ZENG Shao-Qun;ZHOU Wei;LUO Qing-Ming
The Key Laboratory of Biomedical Photonics of Ministry of Education, Huazhong University of Science and Technology, Wuhan 430074
关键词 ：
32.80.Wr ,
33.80.-b ,
33.80.Rv ,
82.50.-m
Abstract ：A photobleaching model; D-P (dye-photon interaction) and D-O (Dye-oxygen oxidative reaction) photobleaching theory, is proposed. The quantitative power dependences of photobleaching rates with both one- and two-photon excitations (1 PE and TPE) are obtained. This photobleaching model can be used to elucidate commendably our and other experimental results. Experimental studies of the photobleaching rates for rhodamine B with TPE under unsaturation conditions reveals that the power dependences of photobleaching rates increase with the increasing dye concentration, and that the photobleaching rate of single molecule increases in the second power of the excitation intensity, which is different from the high-order (> 3) nonlinear dependence of ensemble molecules.
Key words ：
32.80.Wr
33.80.-b
33.80.Rv
82.50.-m
出版日期: 2003-11-01
:
32.80.Wr
(Other multiphoton processes)
33.80.-b
(Photon interactions with molecules)
33.80.Rv
(Multiphoton ionization and excitation to highly excited states (e.g., Rydberg states))
82.50.-m
(Photochemistry)
引用本文:
CHEN Tong-Sheng;ZENG Shao-Qun;ZHOU Wei;LUO Qing-Ming. A Quantitative Theory Model of a Photobleaching Mechanism[J]. 中国物理快报, 2003, 20(11): 1940-1943.
链接本文:
https://cpl.iphy.ac.cn/CN/
或
https://cpl.iphy.ac.cn/CN/Y2003/V20/I11/1940
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