Abstract
We propose a realistic model of the optical properties of silver, in which inter-band transition with a threshold energy of ∼4 eV is described phenomenologically by an ensemble of oscillators with same damping constant and a certain distribution of resonant frequencies from the interband transition threshold to infinity. The contribution of the conduction electrons in the dielectric function is determined by the Drude formula. The proposed model actually contains the features of both the Drude-Lorentz model (Rakicet al., 1998) and Tauc-Lorentz model (Jian-Hong Qiu et al., 2005). However, unlike these works proposed model contains only six fitting parameters, with the square root of the mean square deviation of the absorption coefficient and refractive index of silver from the experimental values in the range of 0.6–6.0 nm being of the order of 0.05.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Etchegoin, P.G., Le Ru, E.C., and Meyer, M., Erratum: An analytic model for the optical properties of gold, J. Chem. Phys., 2006, vol. 125, p. 164705.
Vial, A. and Laroche, T., Comparison of gold and silver dispersion laws suitable for FDTD simulations, Appl. Phys., Ser. B, 2008, vol. 93, pp. 139–143.
Vial, A. and Laroche, T., Description of dispersion properties of metals by means of the critical points method and application to the study of resonant structures using the FDTD method, J. Phys., Ser. D, 2007, vol. 40, pp. 7152–7158.
Ford, G.W. and Weber, W.H., Electromagnetic interactions of molecules with metal surfaces, Phys. Rep., 1984, vol. 113, pp. 195–287.
Rojas, R. and Claro, F., Theory of surface enhanced Raman scattering in colloids, J. Chem. Phys., 1993, vol. 98, no. 2, pp. 998–1006.
Rakic, A.D., Djurisic, A.B., et al., Optical properties of metal films for vertical-cavity optoelectronic devices, Appl. Opt., 1998, vol. 37, pp. 5271–5283.
Jian-Hong Qiu, Peng Zhou, Xiao-Yong Gao, et al., Ellipsometric study of the optical properties of silver oxide prepared by reactive magnetron sputtering, J. Korean Phys. Soc., 2005, vol. 46, pp. S269–S275.
Sancho-Parramon, J., Modreanu, M., Bosch, S., and Stchakovsky, M., Optical Characterization of HfO2 by spectroscopic ellipsometry: Dispersion models and direct data inversion, Thin Solid Films, 2008, vol. 516, pp. 7990–7995.
Johnson, P.B. and Christy, R.W., Optical constants of the noble metals, Phys. Rev., Ser. B, 1972, vol. 6, pp. 4370–4379.
Palik, E.D., Handbook of Optical Constants of Solids, New York: Academic, 1985.
Ashcroft, N.W. and Mermin, N.D., Solid State Physics, Saunders College Publishing, 1976, p. 10.
Ehrenreich, H. and Philipp, H.R., Optical properties of Ag and Cu, Phys. Rev., 1962, vol. 128, pp. 1622–1629.
Palagushkin, A.N., Prokopenko, S.A., et al., Measurement of metal nanolayers optical parameters using surface plasmon resonance method, Opt. Mem. Neural Networks (Inform. Opt.), 2007, vol. 16, pp. 288–294.
Author information
Authors and Affiliations
Corresponding author
About this article
Cite this article
Melikyan, A.O., Kryzhanovsky, B.V. Modeling of the optical properties of silver with use of six fitting parameters. Opt. Mem. Neural Networks 23, 1–5 (2014). https://doi.org/10.3103/S1060992X14010020
Received:
Published:
Issue Date:
DOI: https://doi.org/10.3103/S1060992X14010020