Multimode interference devices for focusing in microfluidic channels.

@article{Hunt2011MultimodeID,
  title={Multimode interference devices for focusing in microfluidic channels.},
  author={Hamish Hunt and James S. Wilkinson},
  journal={Optics letters},
  year={2011},
  volume={36 16},
  pages={
          3067-9
        }
}
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… 
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