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Enhancing optical gradient forces with metamaterials.

Vincent Ginis1, Philippe Tassin, Costas M Soukoulis

  • 1Applied Physics Research Group (APHY), Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussel, Belgium.

Physical Review Letters
|February 19, 2013
PubMed
Summary
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We enhanced optical gradient force using transformation optics and metamaterials. This method boosts optical forces in nanophotonic systems, offering a tenfold increase and robust performance despite material losses.

Area of Science:

  • Photonics and Nanotechnology
  • Metamaterials Science

Background:

  • Optical gradient forces are crucial for nanophotonic actuation systems.
  • Existing methods for enhancing optical forces have limitations.

Purpose of the Study:

  • To demonstrate enhanced optical gradient force using transformation optics.
  • To investigate the role of metamaterials in boosting optical forces.

Main Methods:

  • Utilizing transformation optics with double-negative or single-negative metamaterials.
  • Simulating the effect of metamaterials on interwaveguide distance perceived by light.

Main Results:

  • Achieved more than tenfold enhancement of optical gradient force.
  • Demonstrated robustness of the enhancement method against dissipative loss in metamaterials.

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Conclusions:

  • Transformation optics with metamaterials offer an effective way to boost optical gradient forces.
  • This approach provides an alternative for nanophotonic actuation and can complement existing resonator-based methods.