Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/43860
Title: Tunable self-imaging effect using hybrid optofluidic waveguides
Authors: Shi, Y
Liang, L
Zhu, XQ
Zhang, XM 
Yang, Y
Issue Date: 2015
Publisher: Royal Society of Chemistry
Source: Lab on a chip - miniaturisation for chemistry and biology, 2015, v. 15, no. 23, p. 4398-4403 How to cite?
Journal: Lab on a chip - miniaturisation for chemistry and biology 
Abstract: Multimode interference (MMI) is a typical self-imaging phenomenon and has been widely exploited for optical devices like couplers and splitters. Usually, it utilizes solid waveguides only and thus has very limited tunability in self-imaging properties. This paper reports our original work on tunable MMI using a hybrid optofluidic waveguide. It is generated by the diffusion between miscible flows in a microchannel and consists of two parts: gradient-index liquid-liquid waveguide for light modulation and step-index liquid-solid waveguide for image formation. Simulation and experiments have shown successful realization of the real-time tuning of self-imaging properties. For detail, the image point (focal spot) width could be modulated from 7 μm to 16 μm, and the self-imaging period changes in the range of 500 μm by varying the fluid properties. It is foreseeable that such a hybrid optofluidic waveguide may find wider applications in lab-on-a-chip systems and optical devices.
URI: http://hdl.handle.net/10397/43860
ISSN: 1473-0197 (print)
1473-0189 (online)
DOI: 10.1039/c5lc01066g
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