Retrieval of high-order susceptibilities of nonlinear metamaterials |
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| Affiliation: | School of Aeronautics and Astronautics, Zhejiang University, Hangzhou 310027, China |
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| Abstract: | Active metamaterials embedded with nonlinear elements are able to exhibit strong nonlinearity in microwave regime.However, existing S-parameter based parameter retrieval approaches developed for linear metamaterials do not apply in nonlinear cases. In this paper, a retrieval algorithm of high-order susceptibilities for nonlinear metamaterials is derived.Experimental demonstration shows that, by measuring the power level of each harmonic while sweeping the incident power,high-order susceptibilities of a thin-layer nonlinear metamaterial can be effectively retrieved. The proposed approach can be widely used in the research of active metamaterials. |
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| Keywords: | retrieval high-order susceptibilities nonlinear metamaterials |
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