Fine-tuning of plasmonics by Au@AuY/Au core–shell nanoparticle monolayer for enhancement of third-order nonlinearity

Yong Liu,Chi Pang,Hiroshi Amekura,Thomas Schumann,Peng Liu,Zhixian Wei, Haocheng Liu,Rang Li

Applied Surface Science（2023）

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摘要

•A core–shell NP is proposed by sequential ion implantation.•The flexible modulation of plasmonics is realized in frequency and spatial domains.•Enhancement of interband absorption and fine-tuning of plasmonic absorption.•Surface modification of Au NPs with tunable carrier concentration and mobility.•Enhancement of third-order nonlinearity by 4.4 times than traditional Au NPs.

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关键词

Plasmonics, Core-shell alloy nanostructure, Localized surface plasmon resonance, Third-order nonlinearity, Sequential ion implantation

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