Description of dispersion properties of metals by means of the critical points model and application to the study of resonant structures using the FDTD method

Alexandre Vial (1) , Thierry Laroche (1)

1 LNIO - Laboratoire de Nanotechnologie et d'Instrumentation Optique

Using a combination of Drude and critical points models, we show that the permittivity of several metals can be more efficiently described than using the well-known Drude–Lorentz model. The numerical implementation in a finite-difference time-domain code together with a non-uniform grid enables the study of thin metallic intermediate layers often neglected in simulations but found in realistic resonant structures.

Domains: Materials Science [cond-mat.mtrl-sci]; Computational Physics [physics.comp-ph]; Micro and nanotechnologies/Microelectronics; Optics / Photonic

Alexandre Vial, Thierry Laroche. Description of dispersion properties of metals by means of the critical points model and application to the study of resonant structures using the FDTD method. Journal of Physics D: Applied Physics, 2007, 40 (22), pp.7152-7158. ⟨10.1088/0022-3727/40/22/043⟩. ⟨hal-02299805⟩