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PIER PIER B PIER C PIER M PIER Letters
2009-08-12
Wave and Ray Analysis of a Type of Cloak Exhibiting Magnified and Shifted Scattering Effect
By
Yu Luo,

    Dr. Yu Luo

    The Electromagentics Academy at Zhejiang University

    Zhejiang University

    China

    Homepage

Jing Jing Zhang,
Hongsheng Chen,

    Professor Hongsheng Chen

    The Electromagnetics Academy at Zhejiang Unviersity

    Zhejiang University

    China

    Homepage

Bae-Ian Wu,

    Dr. Bae-Ian Wu

    Massachusetts Institute of Technology

    USA

    Homepage

Li-Xin Ran

    Professor Li-Xin Ran

    The Electromagnetics Academy at Zhejiang University

    Zhejiang Unviersity

    China

    Homepage

Progress In Electromagnetics Research, Vol. 95, 167-178, 2009
doi:10.2528/PIER09070805
Abstract
Ray-tracing exercise and full-wave analysis were performed to validate the performance of a type of cloak composed of isotropic metamaterials. It is shown that objects inside the 'folded region' of this cloak appear invisible to the incoming light from a ray tracing exercise, but exhibit magnified and shifted scattering under a plane wave illumination from a full wave analysis. Gaussian beams are introduced to resolve this interesting paradox resulted from these two methods. We show that at the time-harmonic state, small energy can be diffracted into the folded region and contribute to the resonant state even when the Gaussian beam is steered away from the cloak with an object inside. A scattering pattern identical to that scattered from the image of the object will be formed, which agrees well with the phenomenon in the plane wave incidence case.
Citation
Yu Luo, Jing Jing Zhang, Hongsheng Chen, Bae-Ian Wu, and Li-Xin Ran, "Wave and Ray Analysis of a Type of Cloak Exhibiting Magnified and Shifted Scattering Effect," Progress In Electromagnetics Research, Vol. 95, 167-178, 2009.
doi:10.2528/PIER09070805
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