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Related Experiment Video

Updated: Mar 19, 2026

Optical Trap Loading of Dielectric Microparticles In Air
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Optical particle trapping with focused pseudo-Schell model beams.

Hao Lin, Mengwen Guo, Linfei Chen

    Journal of the Optical Society of America. A, Optics, Image Science, and Vision
    |March 17, 2026
    PubMed
    Summary
    This summary is machine-generated.

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    Focused Gaussian pseudo-Schell model beams trap high-refractive-index particles, while vortex Gaussian pseudo-Schell model beams trap both low- and high-refractive-index particles. These findings offer a theoretical basis for advanced particle trapping applications.

    Area of Science:

    • Optics and Photonics
    • Laser Physics
    • Nanotechnology

    Background:

    • Partially coherent beams are crucial in optical systems.
    • Understanding beam propagation and interaction with particles is essential for applications like optical trapping.

    Purpose of the Study:

    • To derive an analytical expression for the cross-spectral density of pseudo-Schell model beams through ABCD optical systems.
    • To investigate the radiation forces of focused pseudo-Schell model beams on dielectric particles.
    • To explore the potential of these beams for optical particle trapping.

    Main Methods:

    • Utilizing pseudo-modal expansions for partially coherent beams.
    • Deriving analytical expressions for cross-spectral density.
    • Calculating intensity distributions and radiation forces.

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    Last Updated: Mar 19, 2026

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    Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation
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  • Comparing Gaussian pseudo-Schell model (GPSM) and vortex Gaussian pseudo-Schell model (VGPSM) beams with Gaussian Schell-model (GSM) beams.

    • Main Results:

    • Analytical results for intensity distributions show excellent agreement with numerical integration.
    • Focused GPSM beams stably trap high-refractive-index particles.
    • Focused VGPSM beams can simultaneously trap low- and high-refractive-index particles.
    • GPSM beams generate stronger radiation forces than GSM beams for particle trapping.

    Conclusions:

    • The pseudo-modal expansion method simplifies the analysis of pseudo-Schell model beams.
    • GPSM and VGPSM beams show significant potential for effective particle trapping.
    • The study provides a theoretical foundation for utilizing these beams in optical manipulation.