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Spatial dispersion of multilayer fishnet metamaterials
Sergey S Kruk1, David A Powell, Alexander Minovich
1Nonlinear Physics Centre and Centre for Ultrahigh Bandwidth Devices for Optical Systems (CUDOS), Research School of Physics and Engineering, The Australian National University, Canberra, ACT 0200, Australia. sergey.kruk@anu.edu.au
We explore multilayer fishnet metamaterials, detailing transitions between elliptic and hyperbolic dispersion. These unique optical metamaterials enable magnetic hyperbolic and generalized indefinite media due to negative permittivity and permeability.
Area of Science:
- Optics and Photonics
- Materials Science
- Condensed Matter Physics
Background:
- Optical metamaterials offer unique electromagnetic properties.
- Anisotropic media exhibit direction-dependent characteristics.
- Dispersion regimes (elliptic and hyperbolic) dictate wave propagation.
Purpose of the Study:
- Investigate anisotropic properties of multilayer fishnet optical metamaterials.
- Describe topological transitions between elliptic and hyperbolic dispersion.
- Explore the potential for realizing novel electromagnetic media.
Main Methods:
- Theoretical analysis of multilayer fishnet structures.
- Modeling of effective permittivity and permeability tensors.
- Characterization of dispersion relations.
Main Results:
- Identified topological transitions between elliptic and hyperbolic dispersion regimes.
- Demonstrated that fishnet metamaterials can possess negative permittivity and permeability.
- Established the possibility of creating magnetic hyperbolic and generalized indefinite media.
Conclusions:
- Multilayer fishnet metamaterials exhibit unique anisotropic properties.
- These metamaterials facilitate transitions to hyperbolic dispersion.
- They enable the realization of advanced electromagnetic media with tailored properties.
