Nanophotonic waveguide integrated evanescent upconversion spectroscopy for biomedical applications

Enormous progress has been made in demonstrating various applications of nanophotonics. This emerging application of PICs demands a broad optical wavelength range. SiN waveguide system has proven to be a prominent candidate in that regard [1]. Furthermore, nanophotonic waveguide-enhanced Raman spectroscopy has recently been demonstrated [2]. Nanophotonic waveguides can be used to evanescently excite and collect upconverted signals. The fascination of upconversion in Rubrene molecules [3] at near-infrared (NIR) wavelengths makes it an ideal choice for analysis.