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Manipulating energy flow in variable-gap plasmonic waveguides.

Weiren Zhu1, Ivan D Rukhlenko, Malin Premaratne

  • 1Department of Electrical and Computer Systems Engineering, Monash University, Clayton, Victoria 3800, Australia. weiren.zhu@monash.edu

Optics Letters
|December 22, 2012
PubMed
Summary
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We developed a new method to control energy flow in plasmonic waveguides by changing dielectric layer thickness. This enables the design of broadband, low-dispersion plasmonic lenses.

Area of Science:

  • Photonics
  • Materials Science
  • Nanotechnology

Background:

  • Plasmonic waveguides offer unique light-manipulation properties.
  • Controlling energy flow in these structures is crucial for device applications.

Purpose of the Study:

  • To present a generic method for manipulating energy flow in metal-dielectric-metal plasmonic waveguides.
  • To demonstrate the design and performance of a plasmonic convex lens using this method.

Main Methods:

  • Spatially varying the thickness of the dielectric layer in a metal-dielectric-metal waveguide.
  • Theoretical design of a plasmonic convex lens.
  • Full-wave numerical simulations to analyze lens performance.

Main Results:

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Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation
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Published on: September 27, 2011

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  • The proposed method effectively manipulates energy flow.
  • A functional plasmonic convex lens was designed.
  • The designed lens exhibits low dispersion and broadband characteristics.

Conclusions:

  • The presented method is effective and generic for controlling energy flow in plasmonic waveguides.
  • Plasmonic convex lenses can be designed to be low dispersive and broadband.