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Updated: May 31, 2026

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Light-assisted templated self assembly using photonic crystal slabs.

Camilo A Mejia1, Avik Dutt, Michelle L Povinelli

  • 1Department of Physics and Astronomy, University of Southern California, Los Angeles, CA 90089, USA. mejiapra@usc.edu

Optics Express
|July 1, 2011
PubMed
Summary

We introduce light-assisted templated self-assembly to create particle patterns using optical forces. Wavelength and polarization control pattern formation and reconfiguration for photonic devices.

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Area of Science:

  • Photonics
  • Materials Science
  • Nanotechnology

Background:

  • Colloidal self-assembly is crucial for fabricating ordered structures.
  • Controlling self-assembly with external fields remains a challenge.
  • Photonic crystals offer unique light-matter interaction properties.

Purpose of the Study:

  • To develop a novel technique for controlled colloidal self-assembly using light.
  • To investigate the optical forces exerted on colloidal particles by a photonic crystal slab.
  • To demonstrate the potential for all-optically reconfigurable photonic devices.

Main Methods:

  • Calculation of optical forces on colloidal particles positioned above a photonic crystal slab.
  • Simulation of guided resonance modes within the photonic crystal.

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Last Updated: May 31, 2026

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  • Analysis of lateral optical forces influencing particle arrangement.

    • Main Results:

    • Exciting a guided resonance mode generates a strong, attractive optical force.
    • Periodic patterns of trapped colloidal particles are predicted.
    • Pattern formation is shown to be tunable by light's wavelength and polarization.

    Conclusions:

    • Light-assisted templated self-assembly offers precise control over colloidal particle arrangement.
    • The technique enables the formation and dynamic reconfiguration of particle patterns.
    • This method holds promise for designing novel, all-optically tunable photonic devices.