We report the first observation to our knowledge of a sharp minimum in the attenuated total reflectivity of a thin metal film between index-matching layers. The resonance is due to the excitation of the long-range surface-plasmon mode on both sides of the thin metal films, as originally discussed by Sarid [Phys. Rev. Lett. 47, 1927 (1981)]. The angular widths of the observed resonance in silver and aluminum films are both reduced by over an order of magnitude relative to that associated with the Kretschmann excited mode.
© 1983 Optical Society of America
Original Manuscript: April 4, 1983
Published: July 1, 1983
J. C. Quail, J. G. Rako, and H. J. Simon, "Long-range surface-plasmon modes in silver and aluminum films," Opt. Lett. 8, 377-379 (1983)