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Volume 26 - ICOP & ICPET 2020
ICOP & ICPET _ INPC _ ICOFS 2020, 26 - ICOP & ICPET 2020: 513-516 |
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Afshar M, Bavali A, Amani M, Rahmatpanahi A, Ahmadinouri F, Soltaninezhad M. Experimental studying of random lasing in highly concentrated Rd6G solution using dimeric fluorescence emission. ICOP & ICPET _ INPC _ ICOFS 2020; 26 :513-516
URL: http://opsi.ir/article-1-2106-en.html
URL: http://opsi.ir/article-1-2106-en.html
Melika Afshar1 
, Ali Bavali * 1, Marziye Amani1 , Ali Rahmatpanahi1 , Fatemeh Ahmadinouri1 , Mohammad Soltaninezhad1
, Ali Bavali * 1, Marziye Amani1 , Ali Rahmatpanahi1 , Fatemeh Ahmadinouri1 , Mohammad Soltaninezhad1
1- Department of Physics and Energy Engineering, Amirkabir University of Technology, Tehran, Iran.
Abstract: (1732 Views)
In this research, coherent modes of random laser are observed in highly concentrated Rhodamine 6G solutions (close to the solubility limit). The statistical survey of the spikes in the successive spectra as well as the coherent backscattering test of the sample indicates that these modes are provided by constructive interference events due to multiple scattering of photons within medium. The results are explained based on the monomer aggregation and radiative/non-radiative energy transfer processes according to the exciton theory. The scattering feedback besides strong reabsorption of monomeric emission by dimers provides RL spikes over low quantum yield dimeric fluorescence spectra.
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