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15 March 2013 Near field intensity enhancement and localization in noble metal nanoparticle ensembles
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Proceedings Volume 8770, 17th International School on Quantum Electronics: Laser Physics and Applications; 877005 (2013) https://doi.org/10.1117/12.2013200
Event: Seventeenth International School on Quantum Electronics: Laser Physics and Applications, 2012, Nessebar, Bulgaria
Abstract
Theoretical analysis on the electromagnetic field properties in vicinity of noble metal nanostructures is presented. The study is done on the basis of numerical simulation using Finite Difference Time Domain approach. The systems under consideration are two- and three-dimensional arrays composed of gold or silver nanoparticles. The near field intensity distribution and its enhancement are calculated for structures with different characteristics – particle size, inter-particle distance, and at different conditions related to the incident irradiation – polarization, and geometry of excitation. This analysis is used for definition of some optimal parameters for such structures from the viewpoint of application in Surface Enhancement Raman Spectroscopy (SERS). It is shown that the manipulation of the geometry of excitation of the nanoparticle system could be used as a crucial parameter for improving the efficiency of the classical configuration in SERS. The predicted influences of the nanoparticle system properties on the Raman signal enhancement are confirmed experimentally.
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N. N. Nedyalkov, Ru G. Nikov, and P. A. Atanasov "Near field intensity enhancement and localization in noble metal nanoparticle ensembles", Proc. SPIE 8770, 17th International School on Quantum Electronics: Laser Physics and Applications, 877005 (15 March 2013); https://doi.org/10.1117/12.2013200
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