Measurement of the absolute fluorescence quantum yield of rhodamine B solution using a dual-beam thermal lens technique

被引:87
作者
Bindhu, CV
Harilal, SS
Varier, GK
Issac, RC
Nampoori, VPN
Vallabhan, CPG
机构
[1] Laser Division, International School of Photonics, Cochin Univ. of Sci. and Technology
关键词
D O I
10.1088/0022-3727/29/4/022
中图分类号
O59 [应用物理学];
学科分类号
摘要
The dual-beam thermal lens technique has been found to be very effective for the measurement of fluorescence quantum yields of dye solutions. The concentration-dependence of the quantum yield of rhodamine B in methanol is studied here using this technique. The observed results are in line with the conclusion that the reduction in the quantum yield in the quenching region is essentially due to the non-radiative relaxation of the absorbed energy. The thermal lens has been found to become abberated above 40 mW of pump laser power. This low value for the upper limit of pump power is due to the fact that the medium is a resonantly absorbing one.
引用
收藏
页码:1074 / 1079
页数:6
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