title: Design of fishnet metamaterials with broadband negative refractive index in the visible spectrum.
abstract: We propose a technique capable of designing fishnet metamaterials that have a negative refractive index (NRI) over a broad range in the visible and infrared. The technique relies on optimizing the shape and scale of the fishnet apertures as well as the depth of different layers of the composite. A metamaterial is obtained that exhibits an unbroken 552 nm bandwidth of NRI, covering the entire red and infrared regions. Moreover, two fishnet structures perforated with star-like holes are found to render refractive index negative in the yellow and green spectra.
authors: Shiwei
authors: S
authors: Zhou
authors: Scott
authors: S
authors: Townsend
authors: Yi Min
authors: YM
authors: Xie
authors: Xiaodong
authors: X
authors: Huang
authors: Jianhu
authors: J
authors: Shen
authors: Qing
authors: Q
authors: Li