Writing diffractive structures by optical trapping

Jean-Marc R. Fournier; Michael M. Burns; Jene A. Golovchenko

doi:10.1117/12.206208

12 April 1995 Writing diffractive structures by optical trapping

Jean-Marc R. Fournier, Michael M. Burns, Jene A. Golovchenko

Proceedings Volume 2406, Practical Holography IX; (1995) https://doi.org/10.1117/12.206208
Event: IS&T/SPIE's Symposium on Electronic Imaging: Science and Technology, 1995, San Jose, CA, United States

Abstract

Optical forces, such as radiation pressure and the gradient force, are used to trap microscopic size dielectric particles. Regular arrays of optical traps can be constructed interferometrically, and more complex assemblages of traps could be made through holographic-type set-ups. Such optical-well arrays are useful in writing and erasing dynamic gratings. Two-dimensional `optical crystals', composed of monodispersed polystyrene spheres in water, display high diffraction efficiencies and low noise level, thanks respectively to a very high index modulation, and to the very small size dispersion of the scatterers. Many dielectric micro- objects can be arranged in such trap assemblies to form diffractive structures. This is the case in particular for biological materials such as bacteria or other organisms currently trapped with laser tweezers. The possibilities of manufacturing 3D diffractive structures are explored.

Citation Download Citation

Jean-Marc R. Fournier, Michael M. Burns, and Jene A. Golovchenko "Writing diffractive structures by optical trapping", Proc. SPIE 2406, Practical Holography IX, (12 April 1995); https://doi.org/10.1117/12.206208

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