META 2021, META'12

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Palladium-Based Plasmonic Hydrogen-Sensing: Perfect Absorbers and Antenna-Enhanced Geometries
Andreas Tittl, Patrick Mai, Richard Taubert, Daniel Dregely, Jens Dorfmüller, Christian Kremers, Dmitry N Chigrin, Harald Giessen

Last modified: 2012-01-03

Abstract


We present studies on two palladium-based plasmonic hydrogen sensing geometries: perfect absorbers and nanoantenna-enhanced systems. We will present experimental results for a perfect absorber hydrogen sensor working in the visible wavelength range that allows for the reliable and reproducible detection of hydrogen concentrations down to 0.5% in nitrogen. Furthermore, we will show how previously published experimental results on nanoantenna-enhanced hydrogen-sensing can be modeled and understood by including the often neglected effect of palladium lattice expansion in our numerical (FEM) calculations.

Keywords


plasmonics; perfect absorbers; nanoantennas