Dyes in modified polymers:, problems of photostability and conversion efficiency at high intensities

Dyumaev, K. M.; Manenkov, A. A.; Maslyukov, A. P.; Matyushin, G. A.; Nechitailo, V. S.; Prokhorov, A. M.

doi:10.1364/josab.9.000143

Cited by 112 publications

(32 citation statements)

References 11 publications

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“…their photostability). In particular, at near single-emitter level, organic dyes photobleach quickly [22][23][24][25] and quantum dots (QDs) tend to blue-shift and also change their switching and radiative decay behavior after prolonged exposures to high intensities. [26][27][28] The small sizes of the hotspots of dimer nanoantennas limit the interaction to just a few emitters, effectively forcing the system towards such a single-emitter level.…”

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confidence: 99%

Plasmonic Control of Radiative Properties of Semiconductor Quantum Dots Coupled to Plasmonic Ring Cavities

2015

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(Word Style "BD_Abstract").In recent years, a lot of effort has been made to achieve controlled delivery of target particles to the hotspots of plasmonic nano-antennas, in order to probe and/or exploit the extremely large field enhancements produced by such structures. While in many cases such high fields are advantageous, there are instances where they should be avoided. In this work, we consider the implications of using the standard nanoantenna geometries when colloidal quantum dots are employed as target entities. We show that in this case, and for various reasons, dimer antennas are not the optimum choice. Plasmonic Ring Cavities are a better option despite low field enhancements, as they allow collective coupling of many quantum dots in a reproducible and

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confidence: 99%

Plasmonic Control of Radiative Properties of Semiconductor Quantum Dots Coupled to Plasmonic Ring Cavities

2015

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“…These radicals interact effectively with dye molecule at excited states and stimulate their destruction. The incorporation of a low-molecular weight additive is found to suppress the generation of these radical chains [8]. In this case, ethanol may be more effective in suppressing the generation of the radicals.…”

Section: Resultsmentioning

confidence: 96%

Photoacoustic investigations on the photostability of Coumarin 540-doped PMMA

Nedumpara

Paul

Santhi

et al. 2004

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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In this paper, we present a laser-induced photoacoustic study on the photostability of laser dye Coumarin 540 doped in PMMA matrix and modified by the incorporation of low-molecular weight additives. The dependence of photostability of the dye on various experimental conditions, such as nature of solvents, incident optical power and dye concentration, is investigated in detail. The activation rates for the bleaching process are calculated for different concentrations and they suggest the possibility of two distinct mechanisms responsible for photodegradation. Further, analysis of the data confirms the linear dependence of photodegradation on the intensity of incident radiation. The role of different externally influencing parameters, such as wavelength and modulation frequency of incident radiation, is also discussed.

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“…The low solubility of dye in PMMA causes limitations, which is overcome by introducing modifying additives. A review of literature showed that most of the work on dye-doped polymers has been done with Rhodamine dyes [3] and pyromethane dyes. Some works are reported on coumarin dyes [2].…”

Section: Introductionmentioning

confidence: 99%