Calculation of propagation characteristics of surface plasmons in gold/silver nanowires

摘要

We obtain the propagation characteristics of the fundamental plasmon mode guided along Au and Ag nanowires using a simple and accurate method proposed recently by our group for solving the complex eigenvalue equations. Our results are found in excellent agreement with the ones obtained by the finite element method. Furthermore, results obtained using Johnson and Christy's data [Phys. Rev. B 6, 4370 (1972)] for Au and Ag are found in excellent agreement with the recently reported experimental results. On the other hand, Palik's data [Handbook of Optical Constant of Solids (Academic, 1985)] are found to highly overestimate the losses in Ag nanowires. This study establishes a simple and accurate method for theoretical modeling of surface plasmons guided along Au and Ag nanowires for their applications in various plasmonic devices. (C) 2015 Optical Society of America