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Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
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The planar parabolic optical antenna.

David T Schoen1, Toon Coenen, F Javier García de Abajo

  • 1Stanford University, Stanford, California 94305, USA.

Nano Letters
|December 1, 2012
PubMed
Summary

Researchers created a planar nanometallic structure that acts as a broadband, unidirectional parabolic antenna at optical frequencies, overcoming fabrication challenges for nanoscale parabolic reflectors.

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Area of Science:

  • Optics and Photonics
  • Nanotechnology
  • Plasmonics

Background:

  • Parabolic reflectors are common for macroscale light manipulation (e.g., satellite dishes, flashlights).
  • There's a growing need for ultracompact metallic structures to control light at the wavelength scale.
  • Scaling parabolic reflectors to the nanoscale using traditional ray-optics is difficult due to fabrication challenges.

Purpose of the Study:

  • To demonstrate a method for creating nanoscale parabolic reflectors.
  • To utilize plasmon physics for light manipulation at the nanoscale.
  • To develop a broadband, unidirectional parabolic antenna operating at optical frequencies.

Main Methods:

  • Employed plasmon physics to engineer a resonant elliptical cavity.
  • Fabricated an essentially planar nanometallic structure.
  • Investigated its performance as an antenna at optical frequencies.

Main Results:

  • Successfully realized a planar nanometallic structure functioning as a parabolic antenna.
  • The structure demonstrated broadband and unidirectional radiation characteristics.
  • Overcame the limitations of fabricating 3D nanoscale surfaces for parabolic reflectors.

Conclusions:

  • Plasmon physics enables the creation of functional nanoscale parabolic antennas.
  • This work presents a novel approach to light manipulation at the optical frequencies using planar nanostructures.
  • The developed nanostructure offers a scalable solution for advanced optical antenna applications.