We present the design of a dual-band left-handed metamaterial with fishnet structure in the terahertz regime. Its left-handed properties are described by the retrieved effective electromagnetic parameters. We introduc...We present the design of a dual-band left-handed metamaterial with fishnet structure in the terahertz regime. Its left-handed properties are described by the retrieved effective electromagnetic parameters. We introduce an equivalent circuit which offers a theoretical explanation for the left-handed behavior of the dual-band fishnet metamaterial, and investigate its losses receiving- higher figure of mcrit, The design is beneficial to the development of frequency agile and broadband THz materials and devices＇. The dual-band fishnet metamaterial can be extended to infrared and optical frequency ranges by regulating the structural parameters.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No 10974063, the Research Foundation of Wuhan National Laboratory under Grant No P080008, and the National Basic Research Program of China under Grant No 2007CB310403.
文摘We present the design of a dual-band left-handed metamaterial with fishnet structure in the terahertz regime. Its left-handed properties are described by the retrieved effective electromagnetic parameters. We introduce an equivalent circuit which offers a theoretical explanation for the left-handed behavior of the dual-band fishnet metamaterial, and investigate its losses receiving- higher figure of mcrit, The design is beneficial to the development of frequency agile and broadband THz materials and devices＇. The dual-band fishnet metamaterial can be extended to infrared and optical frequency ranges by regulating the structural parameters.
