Shaping plasmonic light beams with near-field plasmonic holograms

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Surface-plasmon waves have been utilized in many applications such as biological and chemical sensing and trapping, sub-wavelength optics, nonlinear optics, optical communication and more. Controlling the shape and trajectory of these waves is a key feature in enabling all of the above applications, and a challenging task. The fundamental challenges resides in the different wave properties of surface plasmon waves, with comparison to free-space waves: First, coupling a surface plasmon wave from a free-space wave requires a compensation for the missing momentum between the two wave-vectors. Second, owing to the limited propagation length of surface plasmons and the limited measurement range of their characterization tools, the resulting beams should be formed directly in the near-field. Third, unlike planar phase plates, surface plasmons are excited over a finite propagation distance and therefore their phase cannot be simply defined at a specific one-dimensional plane. Fourth, dynamic tools for controlling the wavefront of free-space beams, like spatial-light-modulators, do not exist for surface plasmons. Here we demonstrate, both numerically and experimentally, a robust holographic scheme that provides complete control over the amplitude and phase of surface-plasmons, thereby enabling the engineering of any desired plasmonic light beam. We show how all of the above challenges can be overcome by introducing a new class of binary plasmonic holograms, which are designed specifically for the near -filed. We demonstrate a large variety of plasmonic beams, such as "self-similar", "non-diffracting", "self-accelerating","selfhealing", paraxial and non-paraxial plasmonic beams, and also the dynamic generation of plasmonic bottle-beams for micromanipulation of particles.

Original languageEnglish
Title of host publicationPhotonic and Phononic Properties of Engineered Nanostructures V
EditorsAxel Scherer, Ali Adibi, Shawn-Yu Lin
PublisherSPIE
ISBN (Electronic)9781628414615
DOIs
StatePublished - 2015
EventPhotonic and Phononic Properties of Engineered Nanostructures V - San Francisco, United States
Duration: 9 Feb 201512 Feb 2015

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume9371

Conference

ConferencePhotonic and Phononic Properties of Engineered Nanostructures V
Country/TerritoryUnited States
CitySan Francisco
Period9/02/1512/02/15

Keywords

  • Beam shaping
  • Holography
  • Surface plasmons
  • near-field holograms

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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