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Related Experiment Video

Updated: Jun 22, 2026

Construction of a High Resolution Microscope with Conventional and Holographic Optical Trapping Capabilities
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Construction of a High Resolution Microscope with Conventional and Holographic Optical Trapping Capabilities

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Laser trapping of deformable objects.

Naoki Murazawa, Saulius Juodkazis, Hiroaki Misawa

    Optics Express
    |June 25, 2009
    PubMed
    Summary

    Scientists used lasers to trap and move tiny bubbles in molten glass. This laser trapping method works by changing the bubble

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    Area of Science:

    • Materials Science
    • Optics
    • Fluid Dynamics

    Background:

    • Bubbles in viscous melts can affect material properties.
    • Controlling bubble behavior is crucial for manufacturing processes.

    Purpose of the Study:

    • To investigate laser-induced trapping and manipulation of bubbles in viscous glass melts.
    • To elucidate the physical mechanisms behind this phenomenon.

    Main Methods:

    • Utilizing a laser with a low numerical aperture (NA = 0.55) to illuminate bubbles.
    • Observing bubble behavior under laser irradiation.
    • Analyzing bubble shape modifications and surface tension changes.

    Main Results:

    • Successfully trapped and manipulated bubbles with diameters in the tens of micrometers.
    • Demonstrated that laser trapping is achieved through laser-induced shape modification, specifically the formation of a concave dimple.
    • Identified axial heating and decreased surface tension as key contributing factors.

    Conclusions:

    • Laser trapping and manipulation of bubbles in viscous melts is feasible.
    • The described mechanism is applicable to other deformable materials.
    • This technique offers potential for bubble removal from melts and liquids.

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