In situ optical thermometry of hybrid plasmonic nanosystems

GARGIULO, JULIAN; BARELLA, MARIANO; MATÍAS HERRAN; IANINA L. VIOLI; ANA SOUSA CASTILLO; SIMONE EZENDAM; MARTÍNEZ, LUCIANA; ROLAND GRZESCHIK; SCHLÜCKER, SEBASTIAN; MAIER, STEFAN A.; FERNANDO STEFANI; CORTES, EMILIANO

Conferencia; META®, the International Conference on Metamaterials, Photonic Crystals and Plasmonics 2022; 2022

We present a new implementation of anti-Stokes thermometry that enables the in situ photothermal characterization of individual plasmonic nanoparticles from a single hyperspectral photoluminescence confocal image. We study the photothermal response at the single-particle level of spherical gold NPs with sizes ranging from 50 to 100 nm supported on glass, sapphire and graphene substrates. In addition, we study bimetallic Au@Pd NPs in a core@shell configuration. The developed method allows quantitative assessment of the role of temperature in plasmon-assisted applications.