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Optics Letters

Optics Letters

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  • Vol. 36, Iss. 16 — Aug. 15, 2011
  • pp: 3067–3069

Multimode interference devices for focusing in microfluidic channels

Hamish C. Hunt and James S. Wilkinson  »View Author Affiliations


Optics Letters, Vol. 36, Issue 16, pp. 3067-3069 (2011)
http://dx.doi.org/10.1364/OL.36.003067


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Abstract

Low-cost, compact, automated optical microsystems for chemical analysis, such as microflow cytometers for identification of individual biological cells, require monolithically integrated microlenses for focusing in microfluidic channels, to enable high-resolution scattering and fluorescence measurements. The multimode interference device (MMI), which makes use of self-imaging in multimode waveguides, is shown to be a simple and effective alternative to the microlens for microflow cytometry. The MMIs have been designed, realized, and integrated with microfluidic channels in a silica-based glass waveguide material system. Focal spot sizes of 2.4 μm for MMIs have been measured at foci as far as 43.7 μm into the microfluidic channel.

© 2011 Optical Society of America

OCIS Codes
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(130.0130) Integrated optics : Integrated optics
(230.0230) Optical devices : Optical devices

ToC Category:
Integrated Optics

History
Original Manuscript: May 10, 2011
Revised Manuscript: July 13, 2011
Manuscript Accepted: July 14, 2011
Published: August 8, 2011

Virtual Issues
Vol. 6, Iss. 9 Virtual Journal for Biomedical Optics

Citation
Hamish C. Hunt and James S. Wilkinson, "Multimode interference devices for focusing in microfluidic channels," Opt. Lett. 36, 3067-3069 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-16-3067

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