A simple GUI for modeling the optical properties of single metal nanoparticles |
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Authors: | Kaspar D Ko |
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Institution: | a Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA b Affiliate in the Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA c Affiliate in the Department of Bioengineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA |
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Abstract: | We present a graphical user interface, based on the modified long-wavelength approximation, to compute the optical properties of single metal nanoparticles of ellipsoidal geometry (spheres, rods, and disks). The user-friendly interface allows one to readily gauge the accuracy of results obtained using the modified long-wavelength approximation. For spherical particles, up to 10-nm diameter, we confirm that our approach yields an exact correspondence with Mie theory, and gives an approximation error of less than 15% for gold (silver) particles with diameters approaching 40 nm (26 nm). Results are shown to be sensitive to the source data for the optical constants for a given material. The modular nature of the simulation platform provides a quick and intuitive guide for optical characterization experiments. |
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Keywords: | 78 20 Bh 78 67 &minus n 02 70 &minus c |
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