15 September 2004 Propagation effects of surface waves on periodic chromium structures
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We have investigated the propagation of TM-polarized light through periodic Chromium structures. The fabrication of periodic structures was performed with electron-beam lithography. The Chromium layer covered with Chromium Oxide is opaque. Typical slit widths of the periodic structures are varied between 100nm and 400nm. The periods are ranged between 500nm and 10μm. To analyze these structures we have performed FDTD-modeling for wavelengths in the visible and infrared spectral range. The near field region behind these structures was modeled. The propagation of surface waves was observed. Furthermore spectral measurements on periodic structures with varying periods are carried out. We propose a method for the determination of propagation lengths of surface waves across the interfaces of the metal layer. The experimental findings were compared with FDTD modeling. Resonances of the surfaces waves were also modeled with a RCWA algorithm. A comparison between the numerical findings and the experimentally achieved results will be given.
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Peter Triebel, Peter Weissbrodt, Stefan Nolte, Andreas Tunnermann, "Propagation effects of surface waves on periodic chromium structures", Proc. SPIE 5450, Photonic Crystal Materials and Nanostructures, (15 September 2004); doi: 10.1117/12.545610; https://doi.org/10.1117/12.545610

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