Defect-free optical assembly of polystyrene spheres

Gang Wang; Gabriel C. Spalding; John B. Ketterson

doi:10.1117/12.557229

18 October 2004 Defect-free optical assembly of polystyrene spheres

Gang Wang, Gabriel C. Spalding, John B. Ketterson

Proceedings Volume 5514, Optical Trapping and Optical Micromanipulation; (2004) https://doi.org/10.1117/12.557229
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

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.

Citation Download 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, (18 October 2004); https://doi.org/10.1117/12.557229

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