A hybridization model for the plasmon response of complex nanostructures

Area of Science:

• Nanophotonics and Plasmonics
• Computational Electromagnetics
• Materials Science

Background:

• Understanding the plasmon response of complex nanostructures is crucial for advanced optical applications.
• Existing models can be computationally intensive or lack intuitive physical insight for arbitrary shapes.
• Molecular orbital theory provides a successful framework for understanding electron interactions in molecules.

Purpose of the Study:

• To present a simple, intuitive electromagnetic model for plasmon response in complex nanostructures.
• To establish an analogy between plasmon hybridization and molecular orbital theory.
• To demonstrate the model's applicability to multilayer nanostructures.

Main Methods:

• Developed an electromagnetic analog of molecular orbital theory.
• Modeled complex nanostructures as interacting elementary plasmons.
• Applied the model to a four-layer concentric nanoshell as a case study.

Main Results:

• The model provides an intuitive picture of plasmon coupling in complex geometries.
• Plasmon hybridization accurately describes the resonant frequencies of the nanostructures.
• The four-layer concentric nanoshell example demonstrates the model's predictive power.

Conclusions:

• The proposed electromagnetic analog offers a powerful and intuitive tool for analyzing plasmonics in complex nanostructures.
• This hybridization approach simplifies the understanding of resonant frequencies in multilayer systems.
• The model has broad applicability to various arbitrary nanostructure geometries.