External energy transfer in amplified spontaneous emissions from MEH-PPV conjugated polymer |
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| Authors: | Mohamad S Alsalhi Ziyad S Abu Mustafa V Masilamani |
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| Institution: | 1. School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia;2. Department of Physics, Faculty of Science, Sana’a University, Yemen;3. Institute of Microengineering and Nanoelectronics (IMEN), Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia;4. Department of Physics and Astronomy, Laser Group, College of Science, King Saud University, Saudi Arabia;1. School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, PR China;2. College of Physics and Electronic Engineering, Qilu Normal University, Jinan 250013, PR China;3. School of Space Science and Physics, Shandong University, Weihai 264209, PR China;1. Laboratoire de la Matière Condensée et des Nanosciences, Université de Monastir, Avenue de l’Environnement, 5019, Monastir, Tunisia;2. Laboratoire C.H.P.N.R, Université de Monastir, Avenue de l’Environnement, 5019, Monastir, Tunisia;3. Institut Lavoisier, UMR 8180, Université de Versailles, 45, Avenue des Etats-Unis, 78035, Versailles Cedex, France |
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| Abstract: | We observed amplified spontaneous emissions (ASEs) in solutions of conjugated polymer under high power neodymium-doped yttrium aluminum garnet (Nd:YAG) laser excitation. A solution of coumarin-485 dye (C485) and conjugated polymer (MEH-PPV) was prepared in tetrahydrofuran (THF). Here, C485 acted as a donor (with different ratios) while MEH-PPV served as an acceptor (with a constant ratio). Without the donor, MEH-PPV exhibited ASE only in the excimeric state; with the donor, however, it produced ASE in both the monomeric and excimeric states simultaneously. These results clearly show that it is possible to monitor and manipulate the excited state behavior of molecules by using an energy transfer process using laser-excited conjugated polymer. |
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