Inversion of the Chiroptical Responses of Chiral Gold Nanoparticles with a Gold Film.

Autor:	Chen Y; Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR 999077, China., Zheng J; Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR 999077, China., Zhang L; Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR 999077, China., Li S; Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR 999077, China., Chen Y; Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR 999077, China., Chui KK; Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR 999077, China., Zhang W; Institute of Applied Physics and Computational Mathematics, Beijing 100088, China., Shao L; State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, China., Wang J; Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR 999077, China.
Jazyk:	angličtina
Zdroj:	ACS nano [ACS Nano] 2024 Jan 09; Vol. 18 (1), pp. 383-394. Date of Electronic Publication: 2023 Dec 21.
DOI:	10.1021/acsnano.3c07475
Abstrakt:	The deposition of chiral nanoparticles (NPs) onto various substrates is crucial for the fabrication of high-density photonic devices. Understanding the interaction of chiral light and chiral NPs supported on substrates is essential for developing optical sensors and modulators. However, the chiroptical responses of plasmonic chiral NPs on substrates have remained elusive. Here we provide an important understanding of the correlation between the substrate material and the chiroptical response. The scattering dissymmetry factors of individual chiral Au nanocubes are inverted and enhanced with a gold film. Qualitative theories are proposed to analyze the observed variations in the chiroptical signals of chiral NPs on different substrates. Our results offer an encouraging route for modulating and amplifying the chiroptical signals in the use of chiral NPs in light control, light-based quantum technologies, and sensing.
Databáze:	MEDLINE
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