Improved analytical fit of gold dispersion: application to the modelling of extinction spectra with the FDTD method
Phys. Rev. B
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.