Abstract

We have used Mie theory to account for the features of the transmission spectra of dye-coated silver-island films. The unusual behavior of the spectra arises from the effect of the dispersion and damping of the optical response of the absorbing coating on the structural resonances of the silver islands. Our modeling indicates that the power dissipation in the dye coating is enhanced compared with the dissipation of dye deposited on a nonresonant structure. These results help elucidate the excitation mechanisms of Raman and fluorescent emission of adsorbates at rough silver interfaces.

© 1981 Optical Society of America

Nature of the enhanced optical absorption of dye-coated Ag island films

C. F. Eagen
Appl. Opt. 20(17) 3035-3042 (1981)

Optical properties of silver-island films having an overlayer of RhB dye

V. N. Rai
Appl. Opt. 26(12) 2395-2400 (1987)

Optical absorption of small metal particles with adsorbed dye coats

H. G. Craighead and A. M. Glass
Opt. Lett. 6(5) 248-250 (1981)

Excitation spectra of surface-enhanced Raman scattering on silver-island films

D. A. Weitz, S. Garoff, and T. J. Gramila
Opt. Lett. 7(4) 168-170 (1982)

Fluorescent lifetimes of molecules on silver-island films

D. A. Weitz, S. Garoff, C. D. Hanson, T. J. Gramila, and J. I. Gersten
Opt. Lett. 7(2) 89-91 (1982)