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Sub-Wavelength Resonances in Metamaterial-Based Multi-Cylinder Configurations
Samel Arslanagić1, Olav Breinbjerg2
1Department of Electrical Engineering, Electromagnetic Systems, Technical University of Denmark, Ørsteds Plads, Bld. 348, DK-2800, Kgs. Lyngby, Denmark. sar@elektro.dtu.dk.
Materials (Basel, Switzerland)
|September 8, 2017
Summary
Grouping sub-wavelength resonant metamaterial cylinders retains individual resonances, even in closely spaced, electrically small structures. This finding holds for structures composed of dielectric and lossy metamaterials.
Area of Science:
- Electromagnetics
- Materials Science
- Nanotechnology
Background:
- Metamaterial structures exhibit unique sub-wavelength resonances.
- Isolated circular cylindrical metamaterial structures are known to possess resonances.
Purpose of the Study:
- To investigate if individual resonances are preserved when multiple metamaterial cylinders form a larger structure.
- To analyze the behavior of grouped metamaterial resonators in electrically small configurations.
Main Methods:
- Numerical analysis of metamaterial structures with 1, 2, and 4 sets of concentric cylinders.
- Excitation using an electric line current.
- Detailed examination of electric near-field distribution and radiation resistance.
Main Results:
- Individual sub-wavelength resonances are successfully recovered in grouped metamaterial cylinder structures.
- Resonance retention is confirmed even when cylinders are closely spaced.
- The phenomenon is observed in structures comprising dielectric and lossy, dispersive metamaterials.
Conclusions:
- Grouped metamaterial cylinders maintain their inherent resonant properties.
- Electrically small, complex metamaterial structures can be designed to preserve individual resonant characteristics.
- The findings are applicable to metamaterials with both simple dielectric and lossy, dispersive properties.
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