Simultaneous Excitation of Surface Plasmon Polaritons on Both Interfaces in an Asymmetric Dielectric-Metal Corrugated Structure

• Published in: Plasmonics (Norwell, Mass.) Vol. 11; no. 5; pp. 1191 - 1195
• Main Authors: Yuan, H. M., Jiang, X. Q., Zhang, B., Sun, X. D.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01-10-2016; Springer Nature B.V
• Subjects: Absorption; Asymmetry; Biochemistry; Biological and Medical Physics; Biophysics; Biotechnology; Chemistry; Chemistry and Materials Science; Coupled modes; Excitation; Incidence; Incident light; Metal films; Nanotechnology; Plasmons; Polaritons; Propagation modes; Surface chemistry; Wave propagation; Asymmetric corrugated structures; Surface plasmon polaritons; Simultaneous excitation
• ISSN: 1557-1955; 1557-1963
• DOI: 10.1007/s11468-015-0160-7

The simultaneous excitation of plasmon polaritons on both surfaces of metal film was studied for asymmetric dielectric-metal-dielectric corrugated structures. Due to the small resonant absorption of the incident light on the transmission side of the structure, we investigated the enhancement of the surface plasmon polaritons on the mentioned side by controlling the structure parameters. When the illuminate light changes from normal incidence to non-normal incidence, the resonant absorption peak splits into a doublet. The simultaneous excitation of surface plasmon polaritons on both surfaces of the metal film can be achieved by controlling the incident angle. Since the wave vector matching condition is not satisfied, there is no coupling between the plasmon polaritons modes on the two surfaces of the corrugated metallic film. The excitation and control of the non-coupled surface plasmon polartions simultaneously propagating on the different interfaces of one metallic film have potential applications for designing novel compact and tunable nano-photonic devices at visible frequency.