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Proceedings Paper

Defect-free optical assembly of polystyrene spheres
Author(s): Gang Wang; Gabriel C. Spalding; John B. Ketterson
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Paper 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.

Paper Details

Date Published: 18 October 2004
PDF: 8 pages
Proc. SPIE 5514, Optical Trapping and Optical Micromanipulation, (18 October 2004); doi: 10.1117/12.557229
Show Author Affiliations
Gang Wang, Indiana Univ.-Purdue Univ./Fort Wayne (United States)
Gabriel C. Spalding, Illinois Wesleyan Univ. (United States)
John B. Ketterson, Northwestern Univ. (United States)

Published in SPIE Proceedings Vol. 5514:
Optical Trapping and Optical Micromanipulation
Kishan Dholakia; Gabriel C. Spalding, Editor(s)

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