Plasmonic stripes integrated in a silicon nitride Mach Zehnder Interferometer for high sensitivity refractometric sensors

摘要

We demonstrate an interferometric plasmo-photonic sensor based on Si₃N₄ photonic waveguides and gold Surface Plasmon Polariton waveguides. The proposed approach exhibits bulk sensitivity up to 1930 nm/RIU, holding promise for compact and ultra-sensitive interferometric sensing devices.