CST – Computer Simulation Technology

Simple Closed-Form Solution to Predict Short-Range Surface Plasmons in Thin Films Bounded by Asymmetric Media and Its Application to Hole Arrays
M. Lorente-Crespo, C. Mateo-Segura
IEEE Photonics Journal
Vol 8 No. 1
pp 1 - 9
Plasmonics, nanohole arrays, theory, design
Thin metallic films bounded by two dielectric media can support long- and short-range surface plasmon polaritons (SPPs). The dispersion relation associated with these hybrid modes is given by a complex transcendental equation that can only be solved numerically. In this paper, a simple approximate analytical solution for the shortrange modes is derived. To validate the proposed analytical solution, short-range SPPs in a 2-D periodic array of small holes are studied and compared to full-wave simulations. The results prove a spectral response in excellent agreement.

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