中国物理B ›› 2017, Vol. 26 ›› Issue (9): 94207-094207.doi: 10.1088/1674-1056/26/9/094207
• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇 下一篇
Zhi-Yu Wang(王志宇), Jin-Peng Qiu(邱仅朋), Hua Chen(陈华), Jiong-Jiong Mo(莫炯炯), Fa-Xin Yu(郁发新)
Zhi-Yu Wang(王志宇), Jin-Peng Qiu(邱仅朋), Hua Chen(陈华), Jiong-Jiong Mo(莫炯炯), Fa-Xin Yu(郁发新)
摘要: 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.
中图分类号: (Optical susceptibility, hyperpolarizability)