Plasmonic Properties of Supported Pt and Pd Nanostructures
Christoph LanghammerDepartment of Applied Physics, Chalmers University of Technology, 412 96 Göteborg, SwedenZhe YuanDepartment of Applied Physics, Chalmers University of Technology, 412 96 Göteborg, SwedenIgor ZorićDepartment of Applied Physics, Chalmers University of Technology, 412 96 Göteborg, SwedenB. KasemoDepartment of Applied Physics, Chalmers University of Technology, 412 96 Göteborg, Sweden
2006en
ABI
Abstract
The plasmonic properties of nanodisk arrays of Pt, Pd, and, for comparison, Ag are studied over a large size and spectral range and analyzed theoretically by an electrostatic model. Pt and Pd nanodisks exhibit broad localized surface plasmons with a higher sensitivity of the plasmon to the disk aspect ratio compared to Ag. Extinction cross-sections are generally about 50% smaller for Pt and Pd. The spectral plasmon positions, line-widths, and extinction cross-sections are well reproduced by the model.
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