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Light transmission through nanostructured metal films: numerical modeling and experiment

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3 Author(s)
Caputa, K. ; Dept. of Electr. & Comput. Eng., Victoria Univ., BC, Canada ; Gordon, R. ; Leathem, B.

So far, the numerical modeling of the nanostructures in metal films has considered perfect conductors, or used effective surface impedance boundary conditions. Here, we incorporate the Drude response of metals within a finite-difference time-domain (FDTD) method, which allows for modeling the electromagnetic field propagation within the metal. Numerical modeling was performed for a specific 2D structure consisting of a slit surrounded by a periodic array of grooves in a thin gold film. By using the FDTD method with a realistic metal response, we can account for tunneling through the metal film, which was not shown with past models. The modeled structures were fabricated using focused-ion beam milling.

Published in:

Nanotechnology, 2004. 4th IEEE Conference on

Date of Conference:

16-19 Aug. 2004