Plasmonics

, Volume 8, Issue 3, pp 1387–1394

Controllable Mode Hybridization and Interaction Within a Plasmonic Cavity Formed by Two Bimetallic Gratings

Article

DOI: 10.1007/s11468-013-9550-x

Cite this article as:
Ju, D., Jiang, Y. & Pei, H. Plasmonics (2013) 8: 1387. doi:10.1007/s11468-013-9550-x

Abstract

We theoretically study mode hybridization and interaction among surface plasmon polariton Bloch wave mode, Fabry–Perot cavity mode, and waveguide mode within a plasmonic cavity composed by two parallel planar bimetallic gratings. Four hybridized modes result from mode hybridization between surface plasmon polariton Bloch wave modes on the two gratings are observed. By changing the dielectric environment, mode hybridization behavior can be manipulated. Importantly, waveguide-plasmon polariton mode due to hybridization between grating supported surface plasmon polariton Bloch wave mode and cavity supported waveguide mode is observed. We demonstrate that surface plasmon polariton Bloch wave mode and Fabry–Perot cavity mode with the same mode symmetry can interact by presenting an anticrossing behavior, which can be controlled by laterally shifting one grating with respect to the other that causes a phase difference shift of the two involving modes. The proposed plasmonic cavity offers potentials for subwavelength lithography, tunable plasmonic filter, and controllable light-matter interaction.

Keywords

Surface plasmon polaritonBloch wavePlasmonic cavityBimetallic gratingsAnticrossing

Supplementary material

11468_2013_9550_MOESM1_ESM.docx (1.8 mb)
ESM 1(DOCX 1852 kb)

Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  1. 1.Department of PhysicsHarbin Institute of TechnologyHarbinChina
  2. 2.Key Lab of Micro-Optics and Photonic Technology of Heilongjiang ProvinceHarbinChina