Integration of femtosecond laser writen optical waveguides in a lab-on-chip


Martinez-Vazquez, Rebecca and Osellame, Roberto and Nolli, Daniela and Dongre, Chaitanya and Vlekkert, Hans H. van den and Ramponi, Roberta and Pollnau, Markus and Cerullo, Giulio (2009) Integration of femtosecond laser writen optical waveguides in a lab-on-chip. Lab on a Chip, 9 (1). pp. 91-96. ISSN 1473-0197

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Abstract:We use direct femtosecond laser writing to integrate optical waveguides into a commercial fused silica lab-on-chip(LOC). We fabricate high quality waveguides intersecting the microfluidic channels and use them to optically address with high spatial selectivity their content. Fluorescence from the photoexcited volume is efficiently collected at a 90° angle by a high numerical aperture fiber, resulting in a compact and portable setup. Our approach is quite powerful because it allows the integration of photonic functionalities, by simple post-processing, into commercial LOCs, fabricated with standard techniques. By taking advantage of the unique three-dimensional capabilities of femtosecond laser writing, more complex functionalities, such as splitters or Mach-Zehnder interferometers, can be implemented.
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Copyright:© 2009 Royal Society of Chemistry
Electrical Engineering, Mathematics and Computer Science (EEMCS)
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