A simple GUI for modeling the optical properties of single metal nanoparticles

Kaspar D. Ko, Kimani C. Toussaint

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish (US)
Pages (from-to)1037-1043
Number of pages7
JournalJournal of Quantitative Spectroscopy and Radiative Transfer
Issue number12
StatePublished - Aug 2009


  • Computational techniques
  • Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures
  • Simulations
  • Theory, models, and numerical simulation

ASJC Scopus subject areas

  • Spectroscopy
  • Atomic and Molecular Physics, and Optics
  • Radiation


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