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Liquid Core ARROW Waveguides: A Promising Photonic Structure for Integrated Optofluidic Microsensors

Istituto per il Rilevamento Elettromagnetico dell’Ambiente, Consiglio Nazionale delle Ricerche (IREA-CNR), Via Diocleziano 328, 80124 Naples, Italy
Author to whom correspondence should be addressed.
Academic Editors: Shih-Kang Fan, Da-Jeng Yao and Yi-Chung Tung
Micromachines 2016, 7(3), 47;
Received: 16 January 2016 / Revised: 29 February 2016 / Accepted: 7 March 2016 / Published: 11 March 2016
(This article belongs to the Special Issue Optofluidics 2015)
PDF [4384 KB, uploaded 11 March 2016]


In this paper, we introduce a liquid core antiresonant reflecting optical waveguide (ARROW) as a novel optofluidic device that can be used to create innovative and highly functional microsensors. Liquid core ARROWs, with their dual ability to guide the light and the fluids in the same microchannel, have shown great potential as an optofluidic tool for quantitative spectroscopic analysis. ARROWs feature a planar architecture and, hence, are particularly attractive for chip scale integrated system. Step by step, several improvements have been made in recent years towards the implementation of these waveguides in a complete on-chip system for highly-sensitive detection down to the single molecule level. We review applications of liquid ARROWs for fluids sensing and discuss recent results and trends in the developments and applications of liquid ARROW in biomedical and biochemical research. The results outlined show that the strong light matter interaction occurring in the optofluidic channel of an ARROW and the versatility offered by the fabrication methods makes these waveguides a very promising building block for optofluidic sensor development. View Full-Text
Keywords: liquid ARROW; optofluidics; microfluidics; optical sensors; integrated silicon technology liquid ARROW; optofluidics; microfluidics; optical sensors; integrated silicon technology

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Testa, G.; Persichetti, G.; Bernini, R. Liquid Core ARROW Waveguides: A Promising Photonic Structure for Integrated Optofluidic Microsensors. Micromachines 2016, 7, 47.

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