Nanoimprinted distributed feedback dye laser sensors featuring multilayer slab waveguides are presented. A simple yet precise analytical model is used to optimize the lasers in order to give highest sensitivity and it is found that the thickness of a high index TiO2 top layer is the most important parameter for optimization. Using such laser sensors in an imaging spectroscopy setup, real-time label-free monitoring of sugar molecule diffusion in water is demonstrated. This method could potentially pave the way towards the analysis of small molecule diffusion in various media, e.g. protein signaling processes in tissue.
Proceedings of Ecio-moc 2014, 2014
Main Research Area:
the European Conference on Integrated Optics (ECIO 17th) and the MicroOptics Conference (MOC 19th), 2014