H. H. LiuH. P. ChenH. C. ChangHUNG-CHUN CHANG2019-10-312019-10-312016https://scholars.lib.ntu.edu.tw/handle/123456789/429225Waveguide modes propagating along the circular-cylinder silver nanowire on a silica substrate are calculated and studied using an in-house developed full-vector finite-element imaginary-distance beam propagation method (FV-FE-IDBPM). In particular, leaky-mode characteristics for the mode with field guided mainly at the top air-silver interface and that with field distributed mainly near the silver-substrate interface are presented and discussed based on high-resolution numerical analysis. Complex effective indices are accurately solved from which the modal propagation lengths are determined.conference paper10.1109/ursi-emts.2016.75714142-s2.0-84992159529