Fluorescence quantum yield of rhodamine 101 in the presence of absorption saturation |
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| Authors: | A Marcano O I Urdaneta |
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| Institution: | (1) Centro de Fısica, Instituto Venezolano de Investigaciones Cientıficas, Caracas 1020 A, Apartado 21827, Venezuela (E-mail: marcano@pion.ivic.ve), VE;(2) Departamento de Quımica, Universidad Simón Bolıvar, Valle de Sartenejas, Caracas 1080 A, Venezuela, VE |
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| Abstract: | Using the photothermal method we measure the fluorescence quantum yield of a rhodamine 101 solution in ethanol for different
values of the pump-field fluence. Our experiments reveal a depletion of the fluorescence quantum yield as the pump fluence
increases. To explain the observed fluorescence quenching, a dependence of the nonradiative relaxation rates on the field
fluence is proposed. Predictions of the model are in good agreement with the experiments.
Received: 16 November 1999 / Revised version: 5 July 2000 / Published online: 13 September 2000 |
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| Keywords: | PACS: 33 50 -j 33 50 Hv 78 20 Nv |
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