Laser induced saturation of fluorescence for complex organic molecules

被引：5

作者：

Yuzhakov, VI ^{[1
]}

Yevsyukhina, KG ^{[1
]}

Patsayeva, SV ^{[1
]}

机构：

[1] Moscow MV Lomonosov State Univ, Dept Phys, Moscow 119899, Russia

来源：

ALT '97 INTERNATIONAL CONFERENCE ON LASER SURFACE PROCESSING | 1998年 / 3404卷

关键词：

fluorescence; laser spectroscopy; organic dyes;

D O I：

10.1117/12.308644

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effect of fluorescence saturation is caused by limited life-time of molecules in excited state, and appears as a non-linear dependence of detected fluorescence signal versus excitation intensity under laser pulsed irradiation of the sample. It is noticeable at conditions of 10(24) exciting photons pel second per square centimeter, which we usually have for laboratory laser fluorimeter. Spectroscopy of saturated fluorescence is a promising tool for studying such spectral molecular characteristics, as fluorescence life-time, absorption cross-section, constant of singlet-singlet annihilation, and their changes due to molecular interaction. The work presents the theory of the effect considering the cases of different intermolecular interaction (quenching mechanisms, singlet-singlet annihilation), and describes the experimental results on fluorescence saturation for several organic dyes in water.

引用

页码：388 / 396

页数：9