Laser Chemistry
Volume 20 (2002), Issue 2-4, Pages 99-110
doi:10.1080/02786270215153

Studies on Fluorescence Efficiency and Photodegradation of Rhodamine 6G Doped PMMA Using a Dual Beam Thermal Lens Technique

Achamma Kurian,1,2 Nibu A. George,1 Binoy Paul,1 V. P. N. Nampoori,1 and C. P. G. Vallabhan1

1International School of Photonics, Cochin University of Science & Technology, Cochin 682022, India
2Catholicate College, Pathanamthitta 689645, India

Received 11 September 2002

Copyright © 2002 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

In this paper we report the use of the dual beam thermal lens technique as a quantitative method to determine absolute fluorescence quantum efficiency and concentration quenching of fluorescence emission from rhodamine 6G doped Poly(methyl methacrylate) (PMMA), prepared with different concentrations of the dye. A comparison of the present data with that reported in the literature indicates that the observed variation of fluorescence quantum yield with respect to the dye concentration follows a similar profile as in the earlier reported observations on rhodamine 6G in solution. The photodegradation of the dye molecules under cw laser excitation is also studied using the present method.