Compounding Plasmon–Exciton Strong Coupling System with Gold Nanofilm to Boost Rabi Splitting

Various plasmonic nanocavities possessing an extremely small mode volume have been developed and applied successfully in the study of strong light-matter coupling. Driven by the desire of constructing quantum networks and other functional quantum devices, a growing trend of strong coupling research...

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Main Authors: Tingting Song, Zhanxu Chen, Wenbo Zhang, Limin Lin, Yanjun Bao, Lin Wu, Zhang-Kai Zhou
Format: Article
Language:English
Published: MDPI AG 2019-04-01
Series:Nanomaterials
Subjects:
Online Access:https://www.mdpi.com/2079-4991/9/4/564
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spelling doaj-4c68fdd00b2e46e6a625a6c9e11658f02020-11-25T01:56:26ZengMDPI AGNanomaterials2079-49912019-04-019456410.3390/nano9040564nano9040564Compounding Plasmon–Exciton Strong Coupling System with Gold Nanofilm to Boost Rabi SplittingTingting Song0Zhanxu Chen1Wenbo Zhang2Limin Lin3Yanjun Bao4Lin Wu5Zhang-Kai Zhou6State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics, Sun Yat-sen University, Guangzhou 510275, ChinaState Key Laboratory of Optoelectronic Materials and Technologies, School of Physics, Sun Yat-sen University, Guangzhou 510275, ChinaState Key Laboratory of Optoelectronic Materials and Technologies, School of Physics, Sun Yat-sen University, Guangzhou 510275, ChinaState Key Laboratory of Optoelectronic Materials and Technologies, School of Physics, Sun Yat-sen University, Guangzhou 510275, ChinaState Key Laboratory of Optoelectronic Materials and Technologies, School of Physics, Sun Yat-sen University, Guangzhou 510275, ChinaInstitute of High Performance Computing, A*STAR (Agency for Science, Technology and Research), 1 Fusionopolis Way, Connexis, Singapore 138632, SingaporeState Key Laboratory of Optoelectronic Materials and Technologies, School of Physics, Sun Yat-sen University, Guangzhou 510275, ChinaVarious plasmonic nanocavities possessing an extremely small mode volume have been developed and applied successfully in the study of strong light-matter coupling. Driven by the desire of constructing quantum networks and other functional quantum devices, a growing trend of strong coupling research is to explore the possibility of fabricating simple strong coupling nanosystems as the building blocks to construct complex systems or devices. Herein, we investigate such a nanocube-exciton building block (i.e. AuNC@J-agg), which is fabricated by coating Au nanocubes with excitonic J-aggregate molecules. The extinction spectra of AuNC@J-agg assembly, as well as the dark field scattering spectra of the individual nanocube-exciton, exhibit Rabi splitting of 100–140 meV, which signifies strong plasmon–exciton coupling. We further demonstrate the feasibility of constructing a more complex system of AuNC@J-agg on Au film, which achieves a much stronger coupling, with Rabi splitting of 377 meV. This work provides a practical pathway of building complex systems from building blocks, which are simple strong coupling systems, which lays the foundation for exploring further fundamental studies or inventing novel quantum devices.https://www.mdpi.com/2079-4991/9/4/564plasmonicsnanoparticlesplasmon–exciton strong couplingnanoscale building block
collection DOAJ
language English
format Article
sources DOAJ
author Tingting Song
Zhanxu Chen
Wenbo Zhang
Limin Lin
Yanjun Bao
Lin Wu
Zhang-Kai Zhou
spellingShingle Tingting Song
Zhanxu Chen
Wenbo Zhang
Limin Lin
Yanjun Bao
Lin Wu
Zhang-Kai Zhou
Compounding Plasmon–Exciton Strong Coupling System with Gold Nanofilm to Boost Rabi Splitting
Nanomaterials
plasmonics
nanoparticles
plasmon–exciton strong coupling
nanoscale building block
author_facet Tingting Song
Zhanxu Chen
Wenbo Zhang
Limin Lin
Yanjun Bao
Lin Wu
Zhang-Kai Zhou
author_sort Tingting Song
title Compounding Plasmon–Exciton Strong Coupling System with Gold Nanofilm to Boost Rabi Splitting
title_short Compounding Plasmon–Exciton Strong Coupling System with Gold Nanofilm to Boost Rabi Splitting
title_full Compounding Plasmon–Exciton Strong Coupling System with Gold Nanofilm to Boost Rabi Splitting
title_fullStr Compounding Plasmon–Exciton Strong Coupling System with Gold Nanofilm to Boost Rabi Splitting
title_full_unstemmed Compounding Plasmon–Exciton Strong Coupling System with Gold Nanofilm to Boost Rabi Splitting
title_sort compounding plasmon–exciton strong coupling system with gold nanofilm to boost rabi splitting
publisher MDPI AG
series Nanomaterials
issn 2079-4991
publishDate 2019-04-01
description Various plasmonic nanocavities possessing an extremely small mode volume have been developed and applied successfully in the study of strong light-matter coupling. Driven by the desire of constructing quantum networks and other functional quantum devices, a growing trend of strong coupling research is to explore the possibility of fabricating simple strong coupling nanosystems as the building blocks to construct complex systems or devices. Herein, we investigate such a nanocube-exciton building block (i.e. AuNC@J-agg), which is fabricated by coating Au nanocubes with excitonic J-aggregate molecules. The extinction spectra of AuNC@J-agg assembly, as well as the dark field scattering spectra of the individual nanocube-exciton, exhibit Rabi splitting of 100–140 meV, which signifies strong plasmon–exciton coupling. We further demonstrate the feasibility of constructing a more complex system of AuNC@J-agg on Au film, which achieves a much stronger coupling, with Rabi splitting of 377 meV. This work provides a practical pathway of building complex systems from building blocks, which are simple strong coupling systems, which lays the foundation for exploring further fundamental studies or inventing novel quantum devices.
topic plasmonics
nanoparticles
plasmon–exciton strong coupling
nanoscale building block
url https://www.mdpi.com/2079-4991/9/4/564
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