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Spoof Plasmonics: From Metamaterial Concept to Topological Description
Zhen Gao1, Lin Wu2, Fei Gao1,3
1Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore.
Advanced Materials (Deerfield Beach, Fla.)
|May 22, 2018
Summary
This review explores spoof surface plasmon polaritons (SPPs), engineered electromagnetic waves on corrugated metal surfaces. It covers their development from metamaterial concepts to topological physics for advanced waveguiding applications.
Area of Science:
- Metamaterials and Nanophotonics
- Electromagnetism and Wave Phenomena
Background:
- Natural materials have limitations in engineering electromagnetic properties.
- Spoof surface plasmon polaritons (SPPs) mimic surface plasmon polaritons on corrugated metal surfaces, enabling applications where real SPPs do not exist.
Purpose of the Study:
- To review the advancements in spoof SPPs from both practical and fundamental viewpoints.
- To highlight the evolution of theoretical descriptions and applications of spoof SPPs.
Main Methods:
- Review of theoretical frameworks including metamaterial descriptions, band structure analysis via Maxwell's equations, and topological physics.
- Analysis of phenomena such as polaritonic anticrossing and Bragg interference.
Main Results:
- Spoof SPPs offer a versatile platform for controlling electromagnetic waves from microwaves to the far-infrared.
- Theoretical descriptions have evolved from effective medium models to rigorous solutions of Maxwell's equations and topological frameworks.
- Topological descriptions enable the proposal of novel, protected waveguiding phenomena.
Conclusions:
- Spoof SPPs represent a significant development in metamaterials, bridging the gap between microwaves and optical frequencies.
- The field continues to evolve with new theoretical insights and potential device applications.
- Continued research promises further breakthroughs in electromagnetic wave manipulation.
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