Open AccessModeling and designing metallic superlens with metallic objects
Author(s) -
Guillaume Tremblay,
Yunlong Sheng
Publication year - 2011
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.020634
Subject(s) - superlens , optics , planar , optical transfer function , finite difference time domain method , surface plasmon , lithography , point spread function , materials science , near and far field , plasmon , physics , metamaterial , computer science , computer graphics (images)
When the metallic near-field superlens is to image a planar object, which is itself metallic, such as that in the near-field lithography applications, the object nanometer features will act as the Hertzian dipole sources and launch homogeneous and evanescent waves. The imaging system can be modeled as a dielectric Fabry-Perot cavity with the two surface plasmon resonant mirrors. We show the expressions of the transfer function and optimize the imaging system configuration using the genetic algorithm. The effectiveness of the design is confirmed by the image intensity profile computed with the numerical finite difference in time domain method.