The properties of purely bound plasmon–polariton modes guided by a symmetric thin metal film of finite width are described for what is believed to be the first time, and a suitable mode nomenclature for identifying them is proposed. The dispersion characteristics of the modes as a function of film thickness are presented. It has been found that long-range plasmon–polariton modes exist in a symmetric film structure and that one of them may be suitable for optical signal transmission.
© 1999 Optical Society of America
(130.2790) Integrated optics : Guided waves
(240.0310) Optics at surfaces : Thin films
(240.5420) Optics at surfaces : Polaritons
(240.6680) Optics at surfaces : Surface plasmons
(260.2110) Physical optics : Electromagnetic optics
Pierre Berini, "Plasmon polariton modes guided by a metal film of finite width," Opt. Lett. 24, 1011-1013 (1999)