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

Comments

This article was originally published as: 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. Original article available here

© 2012 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

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

Included in

Engineering Commons

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