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Multiple multipole method with automatic multipole setting applied to the simulation of surface plasmons in metallic
Esteban Moreno1, Daniel Erni, Christian Hafner
1Laboratory for Electromagnetic Fields and Microwave Electronics, Swiss Federal Institute of Technology, ETH-Zentrum, Zurich. moreno@ifh.ee.ethz.ch
Summary
Accurate computations of surface plasmons in metallic nanostructures are achieved using the multiple multipole (MMP) method. This approach, aided by automatic multipole setting (AMS), simplifies modeling complex geometries like gratings and coupled structures.
Area of Science:
- Computational physics
- Plasmonics
- Nanophotonics
Background:
- Metallic nanostructures support surface plasmons, leading to unique optical properties.
- Accurate simulation of these phenomena is crucial for designing nanodevices.
- Complex geometries pose significant challenges for numerical modeling.
Purpose of the Study:
- To present highly accurate computations of surface plasmons in metallic nanostructures.
- To demonstrate the suitability of the multiple multipole (MMP) method for these calculations.
- To introduce an automatic multipole setting (AMS) technique for the 2D MMP method.
Main Methods:
- Utilizing the multiple multipole (MMP) method for electromagnetic field calculations.
- Applying an automatic multipole setting (AMS) procedure for efficient model generation.
- Investigating various nanostructure geometries, including irregular cylinders, coupled structures, and periodic gratings.
Main Results:
- Demonstrated resonant behavior with complex field distributions in nanostructures.
- Observed strong field enhancement effects.
- Validated the MMP method with AMS for accurate and simplified modeling.
Conclusions:
- The MMP method combined with AMS is well-suited for accurate surface plasmon computations.
- The presented AMS technique facilitates the modeling of complex nanostructure geometries.
- This approach enables precise analysis of plasmonic phenomena in nanostructures.