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.
- IOMS-SNS: SENSORS
- EC Grant Agreement nr.: FP6/034562
Martinez Vazquez, R., Osellame, R., Nolli, D., Dongre, C., van den Vlekkert, H. H., Ramponi, R., ... Cerullo, G. (2009). Integration of femtosecond laser writen optical waveguides in a lab-on-chip. Lab on a chip, 9(1), 91-96. [10.1039/b808360f]. https://doi.org/10.1039/b808360f