Plasmonic Cloaking of Cylinders: Finite Length, Oblique Illumination and Cross-Polarization Coupling
| Autor: | Andrea Alù, Aaron Kerkhoff, D. Rainwater |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Metamaterial cloaking
General Physics and Astronomy Cloaking Physics::Optics FOS: Physical sciences Physics - Classical Physics 02 engineering and technology 01 natural sciences 7. Clean energy Optics 0103 physical sciences 010306 general physics Plasmon Physics Condensed Matter - Materials Science Scattering business.industry Isotropy Metamaterial Classical Physics (physics.class-ph) Materials Science (cond-mat.mtrl-sci) 021001 nanoscience & nanotechnology Polarization (waves) Wavelength 0210 nano-technology business |
| DOI: | 10.48550/arxiv.1005.2637 |
| Popis: | Metamaterial cloaking has been proposed and studied in recent years following several interesting approaches. One of them, the scattering-cancellation technique, or plasmonic cloaking, exploits the plasmonic effects of suitably designed thin homogeneous metamaterial covers to drastically suppress the scattering of moderately sized objects within specific frequency ranges of interest. Besides its inherent simplicity, this technique also holds the promise of isotropic response and weak polarization dependence. Its theory has been applied extensively to symmetrical geometries and canonical 3D shapes, but its application to elongated objects has not been explored with the same level of detail. We derive here closed-form theoretical formulas for infinite cylinders under arbitrary wave incidence, and validate their performance with full-wave numerical simulations, also considering the effects of finite lengths and truncation effects in cylindrical objects. In particular, we find that a single isotropic (idealized) cloaking layer may successfully suppress the dominant scattering coefficients of moderately thin elongated objects, even for finite lengths comparable with the incident wavelength, providing a weak dependence on the incidence angle. These results may pave the way for application of plasmonic cloaking in a variety of practical scenarios of interest. Comment: 17 pages, 11 figures, 2 tables |
| Databáze: | OpenAIRE |
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