Discrete dipole approximation for lossy plasmonic background

Area of Science:

• Plasmonics and Nanophotonics
• Computational Electromagnetics

Background:

• Investigating light-matter interactions in plasmonic nanostructures is crucial for optical device development.
• Simulating electromagnetic fields near complex geometries in absorbing media presents significant challenges.

Purpose of the Study:

• To apply the discrete dipoles approximation (DDA) method for analyzing light scattering phenomena.
• To study light scattering specifically near a cylindrical cavity within an absorbing plasmonic medium.
• To validate the DDA method's performance on a metal background for the first time.

Main Methods:

• Utilized the discrete dipoles approximation (DDA) method.
• Performed two-dimensional numerical simulations of local electromagnetic fields.
• Compared simulation results with a known analytical solution for validation.

Main Results:

• Demonstrated the discrete dipoles approximation (DDA) method's good performance for light scattering simulations.
• Achieved high accuracy in modeling local fields near the cylindrical cavity.
• Confirmed the method's suitability for plasmonic environments with metal backgrounds.

Conclusions:

• The discrete dipoles approximation (DDA) is a viable and accurate method for studying light scattering in complex plasmonic systems.
• This study establishes a new benchmark for DDA application in metal-dielectric nanostructures.
• The findings support the use of DDA for designing and optimizing plasmonic devices.