Do Cloaked Objects Really Scatter Less

@article{Monticone2013DoCO,
  title={Do Cloaked Objects Really Scatter Less},
  author={F. Monticone and A. Al{\'u}},
  journal={arXiv: Materials Science},
  year={2013}
}
We discuss the global scattering response of invisibility cloaks over the entire frequency spectrum, from static to very high frequencies. Based on linearity, causality and energy conservation we show that the total extinction and scattering, integrated over all wavelengths, of any linear, passive, causal and non-diamagnetic cloak necessarily increases compared to the uncloaked case. In light of this general principle, we provide a quantitative measure to compare the global performance of… Expand

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