Scientific Results

Liquid micro-lens array activated by selective electrowetting on lithium niobate substrates

Year: 2008

Authors: Grilli S., Miccio L., Vespini V., Finizio A., De Nicola S., Ferraro P.

Autors Affiliation: CNR-Istituto Nazionale di Ottica Applicata, Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy; CNR-Cibernetica E Caianiello, I-80078 Pozzuoli, NA, Italy

Abstract: Lens effect was obtained in an open microfluidic system by using a thin layer of liquid on a polar electric crystal like LiNbO3. An array of liquid micro-lenses was generated by electrowetting effect in pyroelectric periodically poled crystals. Compared to conventional electrowetting devices, the pyroelectric effect allowed to have an electrode-less and circuit-less configuration. An interferometric technique was used to characterize the curvature of the micro-lenses and the corresponding results are presented and discussed. The preliminary results concerning the imaging capability of the micro-lens array are also reported. (c) 2008 Optical Society of America.

Journal/Review: OPTICS EXPRESS

Volume: 16 (11)      Pages from: 8084  to: 8093

KeyWords: lithium niobate; micro-lenses;
DOI: 10.1364/OE.16.008084

Citations: 102
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