title: All-angle broadband negative refraction of metal waveguide arrays in the visible range: theoretical analysis and numerical demonstration.
abstract: In this Letter, we introduce a simple metal waveguide array for realizing all-angle wide frequency bandwidth negative refraction from the visible to infrared frequencies. Theoretical analysis from the rigorous coupled-wave theory reveals that the negative coupling constant resulting from the anomalous coupling of guided surface plasmon polariton modes contributes to the negative refraction. The analytical results are confirmed by finite-difference time-domain numerical simulations. Our result provides an alternative way to construct robust all-angle negative refractive materials operating in a wide range of frequency from the near-infrared to the visible range.
authors.affiliation: Key Laboratory of Acoustic and Photonic Materials and Devices, Ministry of Education, and Department of Physics, Wuhan University, Wuhan 430072, China.
authors.forename: Xiebin
authors.initials: X
authors.lastname: Fan
authors.forename: Guo Ping
authors.initials: GP
authors.lastname: Wang
authors.forename: Jeffrey Chi Wai
authors.initials: JC
authors.lastname: Lee
authors.forename: C T
authors.initials: CT
authors.lastname: Chan