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8 June 2017 Study of resonant processes in plasmonic nanostructures for sensor applications (Conference Presentation)
Jiří Pirunčík, Pavel Kwiecien, Jan Fiala, Ivan Richter
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Proceedings Volume 10227, Metamaterials XI; 102270W (2017) https://doi.org/10.1117/12.2266464
Event: SPIE Optics + Optoelectronics, 2017, Prague, Czech Republic
Abstract
This contribution is focused on the numerical studies of resonant processes in individual plasmonic nanostructures, with the attention particularly given to rectangular nanoparticles and concominant localized surface plasmon resonance processes. Relevant models for the description and anylysis of localized surface plasmon resonance are introduced, in particular: quasistatic approximation, Mie theory and in particular, a generalized (quasi)analytical approach for treating rectangularly shaped nanostructures. The parameters influencing resonant behavior of nanoparticles are analyzed with special interest in morphology and sensor applications. Results acquired with Lumerical FDTD Solutions software, using finite-difference time-domain simulation method, are shown and discussed. Simulations were mostly performed for selected nanostructures composed of finite rectangular nanowires with square cross-sections. Systematic analysis is made for single nanowires with varying length, parallel couple of nanowires with varying gap (cut -wires) and selected dolmen structures with varying gap between one nanowire transversely located with respect to parallel couple of nanowires (in both in-plane and -out-of-plane arrangements). The dependence of resonant peaks of cross-section spectral behavior (absorption, scattering, extinction) and their tunability via suitable structuring and morphology changes are primarily researched. These studies are then followed with an analysis of the effect of periodic arrangements. The results can be usable with respect to possible sensor applications.
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Jiří Pirunčík, Pavel Kwiecien, Jan Fiala, and Ivan Richter "Study of resonant processes in plasmonic nanostructures for sensor applications (Conference Presentation)", Proc. SPIE 10227, Metamaterials XI, 102270W (8 June 2017); https://doi.org/10.1117/12.2266464
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KEYWORDS
Nanostructures
Nanowires
Sensors
Plasmonics
Finite-difference time-domain method
Nanoparticles
Surface plasmons
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