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Transformation optofluidics for large-angle light bending and tuning

Transformation optofluidics for large-angle light bending and tuning
Transformation optofluidics for large-angle light bending and tuning
Transformation optics is a new art of light bending by designing materials with spatially variable parameters for developing wave-manipulation devices. Here, we introduce a transformation optofluidic Y-branch splitter with large-angle bending and tuning based on the design of a spatially variable index. Differing from traditional splitters, the optofluidic splitter is achieved in an inhomogeneous medium by coordinate transformation. The designed bidirectional gradient index (GRIN) distribution can be achieved practically by the convection-diffusion process of liquid flowing streams. The transformation optofluidic splitter can achieve a much larger split angle with little bend loss than the traditional ones. In the experiments, a large tunable split angle up to 30° is achieved by tuning the flow rates, allowing optical signals to be freely transferred to different channels. Besides the symmetrical branch splitting, asymmetrical Y-branch splitting with approximately equal power splitting is also demonstrated by changing the composition of the liquids. The optofluidic splitter has high potential applications in biological, chemical and biomedical solution measurement and detection.
1473-0197
3785-3790
Yang, Y.
0c661323-7e23-41c6-a9a2-b4479fd74ef1
Chin, L.K.
d742ce36-11ba-4618-9ce5-cb7301dcafb6
Tsai, J.M.
e2226272-4092-4995-8306-4df94e8e9ede
Tsai, D.P.
ac188460-c076-41ee-bce4-7aa873f757e3
Zheludev, N.I.
32fb6af7-97e4-4d11-bca6-805745e40cc6
Liu, A.Q.
b1a9be75-8e2d-4e6c-8fcf-f532a7a83d71
Yang, Y.
0c661323-7e23-41c6-a9a2-b4479fd74ef1
Chin, L.K.
d742ce36-11ba-4618-9ce5-cb7301dcafb6
Tsai, J.M.
e2226272-4092-4995-8306-4df94e8e9ede
Tsai, D.P.
ac188460-c076-41ee-bce4-7aa873f757e3
Zheludev, N.I.
32fb6af7-97e4-4d11-bca6-805745e40cc6
Liu, A.Q.
b1a9be75-8e2d-4e6c-8fcf-f532a7a83d71

Yang, Y., Chin, L.K., Tsai, J.M., Tsai, D.P., Zheludev, N.I. and Liu, A.Q. (2012) Transformation optofluidics for large-angle light bending and tuning. Lab on a Chip, 12 (19), 3785-3790. (doi:10.1039/c2lc40442g).

Record type: Article

Abstract

Transformation optics is a new art of light bending by designing materials with spatially variable parameters for developing wave-manipulation devices. Here, we introduce a transformation optofluidic Y-branch splitter with large-angle bending and tuning based on the design of a spatially variable index. Differing from traditional splitters, the optofluidic splitter is achieved in an inhomogeneous medium by coordinate transformation. The designed bidirectional gradient index (GRIN) distribution can be achieved practically by the convection-diffusion process of liquid flowing streams. The transformation optofluidic splitter can achieve a much larger split angle with little bend loss than the traditional ones. In the experiments, a large tunable split angle up to 30° is achieved by tuning the flow rates, allowing optical signals to be freely transferred to different channels. Besides the symmetrical branch splitting, asymmetrical Y-branch splitting with approximately equal power splitting is also demonstrated by changing the composition of the liquids. The optofluidic splitter has high potential applications in biological, chemical and biomedical solution measurement and detection.

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More information

Published date: 2012
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 357232
URI: https://eprints.soton.ac.uk/id/eprint/357232
ISSN: 1473-0197
PURE UUID: c5b5b9d6-eeb2-477a-8504-6be64e0d2e56
ORCID for N.I. Zheludev: ORCID iD orcid.org/0000-0002-1013-6636

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Date deposited: 04 Oct 2013 13:46
Last modified: 19 Nov 2019 02:00

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Contributors

Author: Y. Yang
Author: L.K. Chin
Author: J.M. Tsai
Author: D.P. Tsai
Author: N.I. Zheludev ORCID iD
Author: A.Q. Liu

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