Open AccessEvolution of electromagnetic interference through nano-metallic double-slit
Author(s) -
Kyu Min Chae,
Hyun Ho Lee,
SangYoup Yim,
Seung Han Park
Publication year - 2004
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.12.002870
Subject(s) - optics , finite difference time domain method , near and far field , interference (communication) , dielectric , slit , cladding (metalworking) , electromagnetic field , physics , electromagnetic radiation , materials science , optoelectronics , telecommunications , channel (broadcasting) , quantum mechanics , computer science , metallurgy
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.