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Issue 19, 2012
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Guided-wave liquid-crystal photonics

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In this paper we review the state of the art in the field of liquid-crystal tunable guided-wave photonic devices, a unique type of fill-once, molecular-level actuated, optofluidic systems. These have recently attracted significant research interest as potential candidates for low-cost, highly functional photonic elements. We cover a full range of structures, which span from micromachined liquid-crystal on silicon devices to periodic structures and liquid-crystal infiltrated photonic crystal fibers, with focus on key-applications for photonics. Various approaches on the control of the LC molecular orientation are assessed, including electro-, thermo- and all-optical switching. Special attention is paid to practical issues regarding liquid-crystal infiltration, molecular alignment and actuation, low-power operation, as well as their integrability in chip-scale or fiber-based devices.

Graphical abstract: Guided-wave liquid-crystal photonics

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The article was received on 04 May 2012, accepted on 13 Jun 2012 and first published on 14 Jun 2012

Article type: Critical Review
DOI: 10.1039/C2LC40514H
Citation: Lab Chip, 2012,12, 3598-3610
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    Guided-wave liquid-crystal photonics

    D. C. Zografopoulos, R. Asquini, E. E. Kriezis, A. d'Alessandro and R. Beccherelli, Lab Chip, 2012, 12, 3598
    DOI: 10.1039/C2LC40514H

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