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Hybrid plasmonic‐semiconductor assemblies are receiving considerable attention due to the possibility to achieve hot‐carrier‐based photodetection. In this context, 2D transition metal dichalcogenides (TMDs) coupled to metal nanostructures are very promising. However, the plasmon‐to‐TMD carrier injection process is extremely challenging to achieve and even to reveal in a clear‐cut way. Herein, a report of multiple transient absorption ultrafast measurements, with tunable pump excitation, enabling quantitative comparison between the ultrafast behavior of metal nanostructures, TMDs, and their assembly is shown. This allows to provide the evidence of plasmon‐enhanced charge injection from Au nanostripes to a rippled‐shaped molybdenum disulfide (MoS2) few‐layer nanosheet. Finite element method numerical simulations and modeling of the transient optical response corroborate the charge transfer …
Publication date: 
27 Oct 2020

Andrea Camellini, Andrea Mazzanti, Carlo Mennucci, Christian Martella, Alessio Lamperti, Alessandro Molle, Francesco Buatier de Mongeot, Giuseppe Della Valle, Margherita Zavelani‐Rossi

Biblio References: 
Pages: 2000653
Advanced Optical Materials