Unveiling quasi-dark surface plasmon modes in Au nanoring cavities by cathodoluminescence

Abstract Spectral resolving and imaging surface plasmon modes in noble metal nanostructures are important for applications in nanophotonics. Here, we use cathodoluminescence (CL) spectroscopy to excite and probe quasi-dark plasmon modes of Au nanoring cavities. Numerical simulations of both the spec...

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Autores principales:	Chenglin Du, Wei Cai, Wei Wu, Yinxiao Xiang, Lei Wang, Mengxin Ren, Xinzheng Zhang, Jingjun Xu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/1d5c9c7604db4f029228be2e764b2bb1
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id	oai:doaj.org-article:1d5c9c7604db4f029228be2e764b2bb1
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spelling	oai:doaj.org-article:1d5c9c7604db4f029228be2e764b2bb12021-12-02T11:40:52ZUnveiling quasi-dark surface plasmon modes in Au nanoring cavities by cathodoluminescence10.1038/s41598-017-01607-52045-2322https://doaj.org/article/1d5c9c7604db4f029228be2e764b2bb12017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-01607-5https://doaj.org/toc/2045-2322Abstract Spectral resolving and imaging surface plasmon modes in noble metal nanostructures are important for applications in nanophotonics. Here, we use cathodoluminescence (CL) spectroscopy to excite and probe quasi-dark plasmon modes of Au nanoring cavities. Numerical simulations of both the spectra and the electromagnetic field distribution are carried out by using boundary element method. Good agreement between the experimental and simulated results is obtained. Particularly, CL is shown as an efficient method to probe quadrupole modes, which is difficult for traditional optical means. Moreover, a high Purcell factor in excess of 100 is obtained for the dark quadrupole modes in gold ring cavities. Our work provides an efficient way to explore the initial nature of surface plasmon modes in metal nanostructures.Chenglin DuWei CaiWei WuYinxiao XiangLei WangMengxin RenXinzheng ZhangJingjun XuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-6 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Chenglin Du Wei Cai Wei Wu Yinxiao Xiang Lei Wang Mengxin Ren Xinzheng Zhang Jingjun Xu Unveiling quasi-dark surface plasmon modes in Au nanoring cavities by cathodoluminescence
description	Abstract Spectral resolving and imaging surface plasmon modes in noble metal nanostructures are important for applications in nanophotonics. Here, we use cathodoluminescence (CL) spectroscopy to excite and probe quasi-dark plasmon modes of Au nanoring cavities. Numerical simulations of both the spectra and the electromagnetic field distribution are carried out by using boundary element method. Good agreement between the experimental and simulated results is obtained. Particularly, CL is shown as an efficient method to probe quadrupole modes, which is difficult for traditional optical means. Moreover, a high Purcell factor in excess of 100 is obtained for the dark quadrupole modes in gold ring cavities. Our work provides an efficient way to explore the initial nature of surface plasmon modes in metal nanostructures.
format	article
author	Chenglin Du Wei Cai Wei Wu Yinxiao Xiang Lei Wang Mengxin Ren Xinzheng Zhang Jingjun Xu
author_facet	Chenglin Du Wei Cai Wei Wu Yinxiao Xiang Lei Wang Mengxin Ren Xinzheng Zhang Jingjun Xu
author_sort	Chenglin Du
title	Unveiling quasi-dark surface plasmon modes in Au nanoring cavities by cathodoluminescence
title_short	Unveiling quasi-dark surface plasmon modes in Au nanoring cavities by cathodoluminescence
title_full	Unveiling quasi-dark surface plasmon modes in Au nanoring cavities by cathodoluminescence
title_fullStr	Unveiling quasi-dark surface plasmon modes in Au nanoring cavities by cathodoluminescence
title_full_unstemmed	Unveiling quasi-dark surface plasmon modes in Au nanoring cavities by cathodoluminescence
title_sort	unveiling quasi-dark surface plasmon modes in au nanoring cavities by cathodoluminescence
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/1d5c9c7604db4f029228be2e764b2bb1
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Unveiling quasi-dark surface plasmon modes in Au nanoring cavities by cathodoluminescence

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