Scientific Results

Hemicylindrical and toroidal liquid microlens formed by pyro-electro-wetting

Year: 2009

Authors: Miccio L., Paturzo M., Grilli S., Vespini V., Ferraro P.

Autors Affiliation: CNR – Istituto Nazionale di Ottica Applicata, Via Campi Flegrei 34, 80078 Pozzuoli (NA) Italy

Abstract: We found that by opportune functionalization of a polar dielectric substrate, a self-arrangement of hemi-cylindrical or toroidal-shaped liquid droplets can be obtained. The process takes place when a thermal stimulus is provided to a poled substrate whose surface is covered by an oily substance layer. Liquid droplet self-arrangement is due to the pyroelectric effect, and interferometric characterization of the droplets is also reported. We investigated this open microfluidic system for exploring the possibility to obtain liquid cylindrical microlens with variable focal length. Liquid microtoroidal structures arrays are also realized. They could find application as resonant liquid microcavities for whispering gallery modes. (C) 2009 Optical Society of America

Journal/Review: OPTICS LETTERS

Volume: 34 (7)      Pages from: 1075  to: 1077

KeyWords: Liquid Lens; Holography;
DOI: 10.1364/OL.34.001075

Citations: 22
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