Research progress of femtosecond surface plasmon polariton
Wang Yulong1, Zhao Bo2, Min Changjun1, †, Zhang Yuquan1, Yang Jianjun2, Guo Chunlei2, Yuan Xiaocong1, ‡
       

(a) Geometry of a three-layer system consisting of a thin layer I with width of 2a sandwiched between two infinite half spaces II and III. (b) Dispersion relation of the coupled odd and even modes for an air/silver/air multilayer with a metal core of thickness 100 nm.[17]