Journal
APPLIED SCIENCES-BASEL
Volume 11, Issue 19, Pages -Publisher
MDPI
DOI: 10.3390/app11199133
Keywords
localized surface plasmon; nanostructure; plasmonic circuit
Categories
Funding
- National Research Foundation of Korea (NRF) [2017M3D1A1039287, 2018R1A4A1025623, 2020R1A2C4002732]
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education [2020R1A6A3A13076133]
- National Research Foundation of Korea [2020R1A2C4002732, 2020R1A6A3A13076133, 2018R1A4A1025623] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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This study investigates the field distributions of localized surface plasmons on specifically shaped nanostructures and explores the feasibility of manipulating LSP fields by adjusting wavelength, polarization, and the incident orientation of the light source. The calculation of plasmonic fields at different wavelengths for various nanostructure types reveals the potential for manipulating the positions of LSP fields.
Metallic nanowires have been utilized as a platform for propagating surface plasmon (SPs) fields. To be exploited for applications such as plasmonic circuits, manipulation of localized field propagating pattern is also important. In this study, we calculated the field distributions of localized surface plasmons (LSPs) on the specifically shaped nanostructures and explored the feasibility of manipulating LSP fields. Specifically, plasmonic fields were calculated at different wavelengths for a nanoscale rod array (I-shaped), an array connected with two nanoscale rods at right angles (T-shaped), and an array with three nanoscale rods at 120 degrees to each other (Y-shaped). Three different types of nanostructures are suggested to manipulate the positions of LSP fields collaborating with adjustment of wavelength, polarization, and incident orientation of light source. The results of this study are important not only for the understanding of the wavelength-dependent surface plasmon field localization mechanism but also for the applicability of swept source-based plasmonic techniques or designing a plasmonic circuit.
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