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Dynamics of Hot Carriers in Plasmonic Heterostructures by Anton Yu. Bykov; Diane J. Roth; Giovanni Sartorello; Jorge U. Salmón-Gamboa; Anatoly V. Zayats is a Engineering article available to read on EtoBox.

What is Dynamics of Hot Carriers in Plasmonic Heterostructures about?

Understanding and optimising the mechanisms of generation and extraction of hot carriers in plasmonic heterostructures is important for applications in new types of photodetectors, photochemistry and photocatalysis, as well as nonlinear optics. Here, we show using transient dynamic measurements that the relaxation of the excited hot-carriers in Au/Pt hetero-nanostructures is accelerated through the transfer pathway from Au, where they are generated, to Pt nanoparticles, which act as a hot-electron sink. The influence of the environment on the dynamics was also demonstrated. The time-resolved photoluminescence measurements confirm the modified hot-electron dynamics, revealing quenching of the photoluminescence signal from Au nanoparticles in the presence of Pt and an increased photoluminescence lifetime. These observations are signatures of the improved extraction efficiency of hot-carriers by the Au/Pt heterostructures. The results give insight into the time-dependent behaviour of excited compound nanoscale systems and provide a way of controlling the relaxation mechanisms involved, with important consequences for engineering nonlinear optical response and hot-carrier-assisted phot

Who reads Dynamics of Hot Carriers in Plasmonic Heterostructures?

Author

Anton Yu. Bykov; Diane J. Roth; Giovanni Sartorello; Jorge U. Salmón-Gamboa; Anatoly V. Zayats

Publisher

Walter de Gruyter GmbH

Published

2021

Language

EN

Field

Engineering (Physical Sciences)