Quantization of electromagnetic modes and angular momentum on plasmonic nanowires
Zhu Guodong1, Guo Yangzhe1, Dong Bin2, †, Fang Yurui1, ‡
       

Schematic illustration of SPPs propagating on a plasmonic cylindrical waveguide, kmk,m=0ρ^+mkϕϕ^+kz,mz^ .