Photoluminescence and optical studies of photodegradation in nonlinear optical organic chromophores
| Autor: | M. D. H. Bhuiyan, S. G. Raymond, My T. T. Do, S. Janssens, Benjamin Lochocki, Grant V. M. Williams, Andrew J. Kay |
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| Přispěvatelé: | Biophotonics and Medical Imaging |
| Jazyk: | angličtina |
| Rok vydání: | 2009 |
| Předmět: | |
| Zdroj: | Raymond, S G, Williams, G V M, Do, M T T, Janssens, S, Lochocki, B, Bhuiyan, M D H & Kay, A J 2009, Photoluminescence and optical studies of photodegradation in nonlinear optical organic chromophores . in Nonlinear Optics and Applications III . vol. 7354, 735408, Nonlinear Optics and Applications III, Prague, Czech Republic, 20/04/09 . https://doi.org/10.1117/12.820835 Nonlinear Optics and Applications III, 7354 |
| DOI: | 10.1117/12.820835 |
| Popis: | Photostability measurements have been made on host-guest films containing amorphous polycarbonate and an organic chromophore with a high 2nd order nonlinear optical figure of merit. We find that the rate of photodegradation strongly depends on the oxygen partial pressure. At very low oxygen partial pressures (1.4×10-5 bar) the average number of photons required to photodegrade a chromophore is as high as 1×10 9 at 655 nm. Encapsulation leads to an initial rapid decrease in the photodegradation rate due to the trapped oxygen and a gradual photodegradation where 2×109 photons are required to photodegrade a chromophore. There is an anomalous increase and then decrease in the photoluminescence intensity during ultraviolet irradiation. |
| Databáze: | OpenAIRE |
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