Evolution of electromagnetic interference through nano-metallic double-slit

We investigated the characteristics of the near- and far-field regions of the interference for nano-metallic double-slits using a two-dimensional finite-difference time-domain (FDTD) method. We have found that the patterns in the near-field region have a phase difference of pi with respect to those...

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Bibliographic Details
Published in:Optics express 2004-06, Vol.12 (13), p.2870-2879
Main Authors: Chae, Kyu-Min, Lee, Hyun-Ho, Yim, Sang-Youp, Park, Seung-Han
Format: Article
Language:English
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Summary:We investigated the characteristics of the near- and far-field regions of the interference for nano-metallic double-slits using a two-dimensional finite-difference time-domain (FDTD) method. We have found that the patterns in the near-field region have a phase difference of pi with respect to those in the far-field region. A boundary, which separates the interference patterns of the two regions exists as a half circle and grows as the distance between the two slits increase. It is also found that evanescent waves can be enhanced and confined by coating the double-slit with a dielectric cladding.
ISSN:1094-4087
1094-4087
DOI:10.1364/opex.12.002870