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Proceedings Article

Defect-free optical assembly of polystyrene spheres

[+] Author Affiliations
Gang Wang

Indiana Univ.-Purdue Univ./Fort Wayne (USA)

Gabriel C. Spalding

Illinois Wesleyan Univ. (USA)

John B. Ketterson

Northwestern Univ. (USA)

Proc. SPIE 5514, Optical Trapping and Optical Micromanipulation, 747 (October 18, 2004); doi:10.1117/12.557229
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From Conference Volume 5514

  • Optical Trapping and Optical Micromanipulation
  • Kishan Dholakia; Gabriel C. Spalding
  • Denver, CO | August 02, 2004

abstract

We present preliminary results from an experimental study of optically-assisted assembly. Interference patterns, formed by the intersection of two coherent laser beams, result in periodic one-dimensional potential wells ("optical trenches"). Polystyrene spheres become trapped in these potential wells and subsequently self-assemble into a two-dimensional periodic structure. The spacing between optical trenches is adjusted dynamically, which offers the freedom to dynamically control the lattice constant, offering a recipe for defect-free assembly which begins with annealing at large lattice constant and subsequent compression into a close-packed structure.

© (2004) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Gang Wang ; Gabriel C. Spalding and John B. Ketterson
"Defect-free optical assembly of polystyrene spheres", Proc. SPIE 5514, Optical Trapping and Optical Micromanipulation, 747 (October 18, 2004); doi:10.1117/12.557229; http://dx.doi.org/10.1117/12.557229


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