Applied Physics B

, Volume 78, Issue 6, pp 705–709

Multiple-spot optical tweezers created with microlens arrays fabricated by proton beam writing

Authors

    • Department of Physics, Blk S12, Faculty of ScienceNational University of Singapore
  • A.A. Bettiol
    • Department of Physics, Blk S12, Faculty of ScienceNational University of Singapore
    • Centre for Ion Beam Applications, Department of PhysicsNational University of Singapore
  • Y.Y.G. Lee
    • Department of Mechanical Engineering, Faculty of EngineeringNational University of Singapore
  • F.C. Cheong
    • Department of Physics, Blk S12, Faculty of ScienceNational University of Singapore
  • C.T. Lim
    • Department of Mechanical Engineering, Faculty of EngineeringNational University of Singapore
    • Division of Bioengineering, Faculty of EngineeringNational University of Singapore
  • F. Watt
    • Department of Physics, Blk S12, Faculty of ScienceNational University of Singapore
    • Centre for Ion Beam Applications, Department of PhysicsNational University of Singapore
Article

DOI: 10.1007/s00340-004-1425-6

Cite this article as:
Sow, C., Bettiol, A., Lee, Y. et al. Appl. Phys. B (2004) 78: 705. doi:10.1007/s00340-004-1425-6

Abstract

We report two different applications for using arrays of microlenses on glass substrate to facilitate multiple-spot optical trapping of colloidal microbeads. The array of microlenses was made of SU8 or PMMA resist and created by a combination of Proton-Beam writing followed by thermal reflow processes. Firstly, similar to previous reports [8, 9, 10 ], the lenses were utilized as an optical element in generating multiple laser spot arrays that were subsequently focused down to impose a microbead array. In addition, we demonstrated the feasibility of a novel approach of integrating the microlens array into a sample chamber to provide localized optical trapping.

Copyright information

© Springer-Verlag 2004