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Electromechanically Tunable Suspended Optical Nanoantenna.

Kai Chen1, Gary Razinskas1, Thorsten Feichtner1,2,3

  • 1Nano-Optics and Biophotonics Group, Experimental Physics 5, Wilhelm Conrad Röntgen-Center for Complex Material Systems (RCCM), University of Würzburg , Am Hubland, D-97074, Germany.

Nano Letters
|March 23, 2016
PubMed
Summary
This summary is machine-generated.

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We developed a suspended plasmonic nanoantenna that functions as a nanoelectrometer. Applying voltage precisely controls the gap, tuning optical properties for nanoelectromechanical systems.

Area of Science:

  • Plasmonics
  • Optomechanics
  • Nanoelectromechanical systems

Background:

  • Coupling mechanical and plasmonic properties offers applications in optomechanics, sensing, and active plasmonics.
  • Existing systems lack precise control over plasmonic resonances through mechanical means.

Purpose of the Study:

  • To demonstrate a suspended two-wire plasmonic nanoantenna functioning as a nanoelectrometer.
  • To show reversible tuning of optical properties by controlling the nanoantenna gap size.

Main Methods:

  • Fabrication of a suspended two-wire plasmonic nanoantenna.
  • Electrical connection via thin leads without disturbing antenna resonance.
  • Application of voltage to induce charges and control the gap via Coulomb and elastic forces.
Keywords:
Coulomb forceSuspended optical nanoantenna (SONA)nano-optomechanicsnanoelectromechanical systems (NEMS)nanoelectrometer

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Last Updated: Mar 23, 2026

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Trapping of Micro Particles in Nanoplasmonic Optical Lattice
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Main Results:

  • The nanoantenna acts as a nanoelectrometer, enabling precise gap size control.
  • Reversible tuning of resonance wavelength and field enhancement was achieved.
  • Demonstrated the potential for large bandwidth optical nanoelectromechanical systems.

Conclusions:

  • Suspended plasmonic nanoantennas can be effectively used as nanoelectrometers.
  • Precise mechanical control of plasmonic resonances is achievable.
  • This work paves the way for advanced optical nanoelectromechanical systems.