Origin of Negative Imaginary Part of Effective Permittivity of Passive Materials

Kai-Lun Zhang; Zhi-Ling Hou; Ling-Bao Kong; Hui-Min Fang; Ke-Tao Zhan

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Origin of Negative Imaginary Part of Effective Permittivity of Passive Materials

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The anti-resonant phenomenon of effective electromagnetic parameters of metamaterials has aroused controversy due to negative imaginary permittivity or permeability.It is experimentally found that the negative imaginary permittivity can occur for the natural passive materials near the Fabry-Perot resonances.We reveal the nature of negative imaginary permittivity,which is correlated with the magnetoelectric coupling.The anti-resonance of permittivity is a non-inherent feature for passive materials,while it can be inherent for devices or metamaterials.Our finding validates that the negative imaginary part of effective permittivity does not contradict the second law of thermodynamics for metamaterials owing to the magnetoelectric coupling.

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《中国物理快报：英文版》 |2017年第9期|105-108|共4页
作者
Kai-Lun Zhang; Zhi-Ling Hou; Ling-Bao Kong; Hui-Min Fang; Ke-Tao Zhan;
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School of Science & Beijing Key Laboratory of Environmentally Harmful Chemicals Assessment,Beijing University of Chemical Technology, Beijing 100029;

School of Science & Beijing Key Laboratory of Environmentally Harmful Chemicals Assessment,Beijing University of Chemical Technology, Beijing 100029;

School of Science, Beijing Technology and Business University, Beijing 100048;

School of Science & Beijing Key Laboratory of Environmentally Harmful Chemicals Assessment,Beijing University of Chemical Technology, Beijing 100029;

School of Science & Beijing Key Laboratory of Environmentally Harmful Chemicals Assessment,Beijing University of Chemical Technology, Beijing 100029;

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Origin of Negative Imaginary Part of Effective Permittivity of Passive Materials

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