Document Type
Journal Article
Publisher
Optical Society of America
Faculty
Faculty of Computing, Health and Science
School
Electron Science Research Institute / Centre of Excellence for MicroPhotonic Systems
RAS ID
14214
Abstract
We theoretically investigate a widely-used plasmonic structure composed of a nano-slit aperture surrounded by surface corrugations. A systematical semi-analytical theory in form of two nested coupled-mode models is developed to provide intuitive physical pictures. Based on the theory, figures of merit (FoMs) of the structures designed for normal and for oblique incidence/beaming are defined for the first time to incorporate the interlinks among key structural parameters, making global optimization simple and efficient. Both the theory and the FoMs are quantitatively validated with exhaustive calculations and shown to be highly accurate on performance prediction and structural optimization. With the theory and the FoMs, an efficient, effective and standard recipe is introduced for optimal structure design. We believe this work will help to understand the mechanisms of and to facilitate the design of such a structure in various configurations used in various applications.
DOI
10.1109/JLT.2012.2199737
Access Rights
free_to_read
Comments
This is an Author's Accepted Manuscript of: Li, G., Xiao, F. , Li, K., Alameh, K. , & Xu, A. (2012). Theory, figures of merit, and design recipe of the plasmonic structure composed of a nano-slit aperture surrounded by surface corrugations. Journal of Lightwave Technology, 30(15), 2405-2414. Available here
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