Strohfeldt, NikolaiNikolaiStrohfeldtTittl, AndreasAndreasTittlGiessen, HaraldHaraldGiessen2026-03-112026-03-112013-02-26Optical Materials Express 2 (3): 194-204 (2013)https://hdl.handle.net/11420/61997One of the main challenges in optical hydrogen sensing is the stability of the sensor material. We found and studied an optimized material combination for fast and reliable optical palladium-based hydrogen sensing devices. It consists of a palladium-nickel alloy that is buffered by calcium fluoride and capped with a very thin layer of platinum. Our system shows response times below 10 s and almost no short-term aging effects. Furthermore, we successfully incorporated this optimized material system into plasmonic nanostructures, laying the foundation for a stable and sensitive hydrogen detector.en2159-393020132194204Technology::600: TechnologyJournal Article10.1364/OME.3.000194Journal Article