Electromagnetic wave interactions with a metamaterial cloak |
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Authors: | Chen Hongsheng Wu Bae-Ian Zhang Baile Kong Jin Au |
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Affiliation: | The Electromagnetics Academy at Zhejiang University, Zhejiang University, Hangzhou 310058, China. chenhs@ewt.mit.edu |
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Abstract: | We establish analytically the interactions of electromagnetic wave with a general class of spherical cloaks based on a full wave Mie scattering model. We show that for an ideal cloak the total scattering cross section is absolutely zero, but for a cloak with a specific type of loss, only the backscattering is exactly zero, which indicates the cloak can still be rendered invisible with a monostatic (transmitter and receiver in the same location) detection. Furthermore, we show that for a cloak with imperfect parameters the bistatic (transmitter and receiver in different locations) scattering performance is more sensitive to eta(t)=square root micro(t)/epsilon(t) than n(t)=square root micro(t)epsilon(t). |
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