title: Evolution of electromagnetic interference through nano-metallic double-slit.
abstract: 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.
authors.forename: Kyu-Min
authors.initials: KM
authors.lastname: Chae
authors.forename: Hyun-Ho
authors.initials: HH
authors.lastname: Lee
authors.forename: Sang-Youp
authors.initials: SY
authors.lastname: Yim
authors.forename: Seung-Han
authors.initials: SH
authors.lastname: Park