Dispersive Cylindrical Cloaks under Non-Monochromatic Illumination
arXiv:0905.2865 · doi:10.1103/PhysRevE.81.016611
Abstract
Transformation-based cylindrical cloaks and concentrators are illuminated with non-monochromatic waves and unusual effects are observed with interesting potential applications. The transient responses of the devices are studied numerically with the Finite-Difference Time-Domain method and the results are verified with analytical formulas. We compute the effective bandwidth of several cloaking schemes as well as the effect of losses on the performance of the structures. We also find that narrowband behavior, frequency shift effects, time delays and spatial disturbances of the incoming waves are dominant due to the inherently dispersive nature of the devices. These effects are important and should be taken into account when designing metamaterial-based devices.
12 pages, 9 figures
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Cited by in corpus (4)
- A diameter--bandwidth product limitation of isolated-object cloaking
- Seamless Integration of Global Dirichlet-to-Neumann Boundary Condition and Spectral Elements for Transformation Electromagnetics
- General scaling limitations of ground-plane and isolated-object cloaks
- Analysis in temporal regime of dispersive invisible structures designed from transformation optics