Research progress of femtosecond surface plasmon polariton

Wang Yulong¹, Zhao Bo², Min Changjun^{1, †}, Zhang Yuquan¹, Yang Jianjun², Guo Chunlei², Yuan Xiaocong^{1, ‡}

(a) Schematic diagram of SPPs excited on the medium–metal interface. (b) Dispersion curve of an SPP wave, k_SPP and k are the SPP and free-space wave vectors, respectively.^[16]