1. Application of circuit model for gap-plasmon nanodisk resonators.
- Author
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Dareini, M., Ghorbani, S.R., Arabi, H., and Rezaei, S. Daqiqeh
- Abstract
The design of plasmonic metasurfaces is often based on solving the Maxwell electromagnetic equations, which can be a time-consuming and expensive process considering many geometrical parameters that can limit design flexibility. To speed up the design flow, a model based on the classical transmission line theory is presented. The proposed equivalent circuit model can predict the plasmon resonance wavelength based on various geometrical parameters including dielectric thickness and disk diameter. In addition, unlike other reported circuit models, the developed model considers the nanostructure array pitch size, which is crucial in metasurface design. Comparison between the results obtained from circuit model and full wavelength simulation showed that the circuit parameters accurately determine the response of the structure. Finally, as a metasurface design demonstration, we utilized our model to simulate aluminum-based gap-plasmon nanodisk arrays for optimizing their optical response to maximize structural color saturation. • The equivalent circuit model for the plasmonic MIM structure composed of Al-nanodisk and Al-oxide was developed. • The optimal geometric parameters for color generation were determined using circuit modeling. • The results showed that the response of the structure to the wave were accurately determined by the circuit parameters. • Changing the diameter of the nanodisks and their pitch size in a certain range lead to the generation of a wide color spectrum. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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