The transmission property of metallic films with two-dimensional hole arrays is studied experimentally and numerically. For a triangular lattice subwavelength hole array in a 150 nm thick Ag film, both cavity resonance and planar surface modes are identified as the sources of enhanced optical transmissions. Semi-analytical models are developed for calculating the dispersion relation of the cavity resonant mode. They agree well with the experimental results and full-wave numerical calculations. Strong interaction between the cavity resonant mode and surface modes is also observed.
This is an author-produced, peer-reviewed version of this article. © 2009, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (https://creativecommons.org/licenses/by-nc-nd/4.0/). The final, definitive version of this document can be found online at Optics Communications, doi: 10.1016/j.optcom.2010.05.055
Kuang, Wan; English, Alex; Knowlton, William B.; Lee, Jeunghoon; Hughes, William L.; and Yurke, Bernard. (2010). "Cavity Resonant Mode in a Metal Film Perforated with Two-Dimensional Triangular Lattice Hole Arrays". Optics Communications, 283(20), 4090-4093.