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Invisibility and cloaking structures as weak or strong solutions of Devaney-Wolf theorem
Optics Express
|August 25, 2016
Summary
A unified theory for invisible and cloaking structures is proposed, inspired by the Devaney-Wolf theorem. This theory reveals that invisibility and cloaking phenomena depend on material contrast, offering insights into non-scattering devices.
Area of Science:
- Electromagnetism and Optics
- Metamaterials and Nanophotonics
Background:
- The Devaney-Wolf theorem provides a foundation for understanding non-radiating sources.
- Existing theories for cloaking often lack a unified framework.
Purpose of the Study:
- To propose a unified theory for invisible and cloaking structures.
- To explore the underlying principles governing non-scattering devices.
Main Methods:
- Solving the Devaney-Wolf theorem in both quasi-static and beyond quasi-static regimes.
- Analytical demonstration of weak and strong solutions based on material contrast.
Main Results:
- Existence of Anapole modes, Mantle Cloaking, and Plasmonic Cloaking in the quasi-static limit.
- Prediction of general non-scattering devices, including those based on directional invisibility and Transformation Optics.
- Identification of material contrast as a key factor in both weak and strong solutions.
Conclusions:
- The proposed unified theory offers a comprehensive framework for invisible and cloaking structures.
- Material contrast is a fundamental parameter governing the performance of non-scattering devices.
- The theory bridges quasi-static and dynamic regimes, unifying various cloaking concepts.
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