Title

Image Resolution Of Surface-Plasmon-Mediated Near-Field Focusing With Planar Metal Films In Three Dimensions Using Finite-Linewidth Dipole Sources

Abstract

We study the role of surface plasmons in the near-field focusing of a finite-linewidth point dipole by a planar silver film using three-dimensional finite element calculations. We find that the intensity distribution in the image plane at a distance of 60 nm from the source is narrowed by a factor of 1.4 in the presence of a 30-nm-thick silver film. The lateral field components are found to be focused significantly better. We show that the difference is caused by unavoidable stray fields normal to the lens surface due to the interface charge distribution induced by the presence of surface plasmons. © 2004 The American Physical Society.

Publication Date

1-28-2004

Publication Title

Physical Review B - Condensed Matter and Materials Physics

Volume

69

Issue

4

Number of Pages

-

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1103/PhysRevB.69.045418

Socpus ID

1542344033 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/1542344033

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