Tunable two-dimensional hexagonal phase array in domain-engineered Z-cut lithium niobate crystal

Year: 2006

Authors: Paturzo M., De Natale P., De Nicola S., Ferraro P., Mailis S., Eason R.W., Coppola G., Iodice M., Gioffré M.

Autors Affiliation: CNR – Istituto Nazionale di Ottica Applicata and LENS-European Laboratory for Nonlinear Spectroscopy, Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy;
Optoelectronics Research Centre, University of Southampton, Highfield, Southampton, SO17 1BJ, UK;
Istituto Microelettronica e Microsistemi del CNR, Via P. Castellino 111, 80131 Napoli, Italy

Abstract: An optical phase array with tunable phase step is demonstrated. The phase array consists of a two-dimensional hexagonal lattice of inverted ferroelectric domains fabricated on a Z-cut lithium niobate substrate. The electro-optically tunable phase step is obtained by the application of an external electric field along the z axis of the crystal via transparent electrodes. Theoretical analysis and experimental results are presented, showing that a tunable and flexible adaptive optical illuminator device can be realized by combining the electro-optic tunability with the Talbot effect. Generation of a multiplicity of light patterns is shown. (c) 2006 Optical Society of America.

Journal/Review: OPTICS LETTERS

Volume: 31 (21)      Pages from: 3164  to: 3166

KeyWords: Hexagonal lattices; Light patterns; Talbot effect; Transparent electrodes, Adaptive systems; Electrooptical effects; Lithium niobate; Optical systems, Arrays
DOI: 10.1364/OL.31.003164

Citations: 31
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