Surface plasmon-based detection for picosecond ultrasonics in planar gold-dielectric layer geometries.

"Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper."

"Acknowledgements and Funding This work has been supported by the German Research Foundation (10.13039/100004807DFG) through the SFB 767 and by the project "Zero Defect Manufacturing - Universal surface characterization for process optimization" (ZDM_OmniScan) by the Federal Government of Upper Austria and the European Regional Development Fund (10.13039/501100008530EFRE) in the framework of the EU-program IWB2020 with additional funds from the REACT-EU initiative and is co-financed by research subsidies granted by the Government of Upper Austria (Wi-2021-303205/13-Au)."