Transmitted interference effect of double metallic nanoslits composed of a slit and a square-funnel slit

The transmitted interference characteristics for double metallic nanoslits, which are composed of a slit and a square funnel, are investigated by the finite-difference time-domain method. Two types of interference patterns, i.e., the periodic single peak or the periodic double peaks profile, are obs...

Full description

Saved in:
Bibliographic Details
Published in:Optics communications 2010-02, Vol.283 (4), p.608-612
Main Authors: Bian, Ting-Ting, Gu, Ben-Yuan, Zhang, Yan
Format: Article
Language:English
Subjects:
Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Corners
Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures
Exact sciences and technology
Finite difference method
Fundamental areas of phenomenology (including applications)
Interference
Interference effect
Mathematical analysis
Metallic nanoslits
Nanocomposites
Nanomaterials
Nanostructure
Optics
Physics
Slits
Surface and interface electron states
Surface plasmons
Wave optics
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The transmitted interference characteristics for double metallic nanoslits, which are composed of a slit and a square funnel, are investigated by the finite-difference time-domain method. Two types of interference patterns, i.e., the periodic single peak or the periodic double peaks profile, are observed by varying the geometric parameters of the square-funnel slit. The fringe period crucially depends on the exit layer thickness of the square-funnel slit. The near-field field intensity can be enhanced three times that in symmetric slit-doublet structure by selecting specific parameters. We also find that surface plasmon waves can creep along the interface between metal and dielectric, even though the interface possesses orthogonal corners.
ISSN:0030-4018
1873-0310
DOI:10.1016/j.optcom.2009.10.096