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Title

Laser trapping of deformable objects

Author(s)

Murazawa, Naoki;  Juodkazis, Saulius;  Misawa, Hiroaki;  Wakatsuki, Hiroshi

Abstract

We report the trapping and manipulation of bubbles in viscous glass melts through the use of a laser. This phenomenon is observed in bubbles tens of micrometers in diameter under illumination by low numerical aperture (N = 0.55). Once the bubble was centered on the optical axis, it was trapped and followed a lateral relocation of the laser beam. This phenomenon is explained by modifications of the bubble's shape induced by axial heating and a decrease in surface tension. It is shown that formation of a concave dimple on the bubble's front surface explains the observed laser trapping and manipulation. This mechanism of laser trapping is expected to take place in other deformable materials and can also be used to remove bubbles from melts or liquids. For this technique to be effective, the alteration of the bubble's shape should be faster than its expulsion out of the laser's point of focus.

Publication type

Journal article

Source

Optics Express, Vol. 15, no. 20 (Oct 2007), pp. 13310-13317

Publication year

2007

FOR Code(s)

0205 Optical Physics;  0903 Biomedical Engineering;  1113 Ophthalmology and Optometry

Keyword(s)

Axial heating;  Bubbles;  Glass;  Glass melts;  Laser beams;  Laser heating;  Laser trapping;  Molten materials;  Surface tension

Publisher

Optical Society of America

ISSN

1094-4087

Publisher URL

http://dx.doi.org/10.1364/oe.15.013310

Copyright

Copyright © 2007 Optical Society of America. This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/oe.15.013310. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.

Additional information

The authors acknowledge support from the Grant-in-Aid from the Ministry of Education, Science, Sports, and Culture of Japan, No.19360322.

Full text

Peer reviewed