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Updated: May 10, 2026

Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation
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Enhanced optical forces in integrated hybrid plasmonic waveguides.

Huan Li1, Jong W Noh, Yu Chen

  • 1Department of Electrical and Computer Engineering, University of Minnesota, 200 Union Street SE, Minneapolis, Minnesota 55455, USA.

Optics Express
|June 6, 2013
PubMed
Summary

Researchers demonstrate gradient optical forces in hybrid plasmonic waveguides for the first time. Experiments confirmed optical force enhancement but revealed higher optical loss due to fabrication imperfections.

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Area of Science:

  • Plasmonics
  • Nanophotonics
  • Optomechanics

Background:

  • Metal-dielectric hybrid plasmonic waveguides (HPWG) offer unique light-matter interaction properties.
  • Understanding and quantifying optical forces within these structures is crucial for optomechanical device development.

Purpose of the Study:

  • To demonstrate and quantify gradient optical forces in HPWG for the first time.
  • To investigate the relationship between optical forces and mechanical vibrations in suspended HPWG.
  • To characterize propagation loss in HPWG and identify sources of loss.

Main Methods:

  • Excitation of nanomechanical vibration in suspended HPWG to measure optical force.
  • Utilizing integrated Mach-Zehnder interferometry for transducing mechanical motion.

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  • Characterizing propagation loss in the HPWG devices.

    • Main Results:

    • Successful demonstration of gradient optical forces in HPWG.
    • Experimental confirmation of predicted optical force enhancement.
    • Observation of significantly higher optical loss than theoretically predicted.

    Conclusions:

    • HPWG exhibit gradient optical forces, enabling potential optomechanical applications.
    • Fabrication-induced issues, such as metal surface roughness, significantly increase optical loss.
    • Further optimization of fabrication processes is necessary to mitigate loss and fully leverage HPWG capabilities.