Improved analytical fit of gold dispersion:: Application to the modeling of extinction spectra with a finite-difference time-domain method -: art. no. 085416

We propose an accurate description for the dispersion of gold in the range of 1.24-2.48 eV. We implement this improved model in an FDTD algorithm and evaluate its efficiency by comparison with an analytical method. Extinction spectra of gold nanoparticle arrays are then calculated.