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Nanoscale plasmonic devices for dynamically controllable beam focusing and scanning

Authors
Journal
Photonics and Nanostructures - Fundamentals and Applications
1569-4410
Publisher
Elsevier
Publication Date
Volume
8
Issue
1
Identifiers
DOI: 10.1016/j.photonics.2009.12.001
Keywords
  • Plasmonics
  • Metallic Nano-Optic Lenses
  • Beam Shaping
  • Nano-Scanner
  • Beam Deflection
Disciplines
  • Mathematics

Abstract

Abstract We have performed simulations to investigate the variable focusing and scanning capability of metallic nano-slit configurations. In a symmetric nanorod configuration inside an aperture with adjustable offset of the center rod, the focal position is found to be variable in the 0.5–3.5 μm range. In a ladder configuration of the rods, the transmitted beam is found to be deflected up to 23°. Horizontal displacement of rods allows for finer control of angular scanning up to 4°. Such slit geometries offer the potential to be controlled by using nano-positioning systems for applications in dynamic beam shaping and scanning on the nanoscale.

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