Mode evolution and nanofocusing of grating-coupled surface plasmon polaritons on metallic tip

We present a detailed analysis on mode evolution of grating-coupled surface plasmonic polaritons (SPPs) on a conical metal tip based on the guided-wave theory. The eigenvalue equations for SPPs modes are discussed, revealing that cylindrical metal waveguides only support TM01 and HEm1 surface modes....

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Autores principales:	Lu Fanfan, Zhang Wending, Huang Ligang, Liang Shuhai, Mao Dong, Gao Feng, Mei Ting, Zhao Jianlin
Formato:	article
Lenguaje:	EN
Publicado:	Institue of Optics and Electronics, Chinese Academy of Sciences 2018
Materias:	surface plasmon polaritons plasmonic tip nanofocusing metal nanostructures electromagnetic field enhancement Optics. Light QC350-467
Acceso en línea:	https://doaj.org/article/7a1ae82027d34d8fb2fa144c0dba3b8b
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spelling	oai:doaj.org-article:7a1ae82027d34d8fb2fa144c0dba3b8b2021-11-11T10:07:35ZMode evolution and nanofocusing of grating-coupled surface plasmon polaritons on metallic tip2096-457910.29026/oea.2018.180010https://doaj.org/article/7a1ae82027d34d8fb2fa144c0dba3b8b2018-07-01T00:00:00Zhttp://www.oejournal.org/article/doi/10.29026/oea.2018.180010https://doaj.org/toc/2096-4579We present a detailed analysis on mode evolution of grating-coupled surface plasmonic polaritons (SPPs) on a conical metal tip based on the guided-wave theory. The eigenvalue equations for SPPs modes are discussed, revealing that cylindrical metal waveguides only support TM01 and HEm1 surface modes. During propagation on the metal tip, the grating-coupled SPPs are converted to HE31, HE21, HE11 and TM01 successively, and these modes are sequentially cut off except TM01. The TM01 mode further propagates with drastically increasing effective mode index and is converted to localized surface plasmons (LSPs) at the tip apex, which is responsible for plasmonic nanofocusing. The gap-mode plasmons can be excited with the focusing TM01 mode by approaching a metal substrate to the tip apex, resulting in further enhanced electric field and reduced size of the plasmonic focus.Lu FanfanZhang WendingHuang LigangLiang ShuhaiMao DongGao FengMei TingZhao JianlinInstitue of Optics and Electronics, Chinese Academy of Sciencesarticlesurface plasmon polaritonsplasmonic tip nanofocusingmetal nanostructureselectromagnetic field enhancementOptics. LightQC350-467ENOpto-Electronic Advances, Vol 1, Iss 6, Pp 180010-1-180010-7 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	surface plasmon polaritons plasmonic tip nanofocusing metal nanostructures electromagnetic field enhancement Optics. Light QC350-467
spellingShingle	surface plasmon polaritons plasmonic tip nanofocusing metal nanostructures electromagnetic field enhancement Optics. Light QC350-467 Lu Fanfan Zhang Wending Huang Ligang Liang Shuhai Mao Dong Gao Feng Mei Ting Zhao Jianlin Mode evolution and nanofocusing of grating-coupled surface plasmon polaritons on metallic tip
description	We present a detailed analysis on mode evolution of grating-coupled surface plasmonic polaritons (SPPs) on a conical metal tip based on the guided-wave theory. The eigenvalue equations for SPPs modes are discussed, revealing that cylindrical metal waveguides only support TM01 and HEm1 surface modes. During propagation on the metal tip, the grating-coupled SPPs are converted to HE31, HE21, HE11 and TM01 successively, and these modes are sequentially cut off except TM01. The TM01 mode further propagates with drastically increasing effective mode index and is converted to localized surface plasmons (LSPs) at the tip apex, which is responsible for plasmonic nanofocusing. The gap-mode plasmons can be excited with the focusing TM01 mode by approaching a metal substrate to the tip apex, resulting in further enhanced electric field and reduced size of the plasmonic focus.
format	article
author	Lu Fanfan Zhang Wending Huang Ligang Liang Shuhai Mao Dong Gao Feng Mei Ting Zhao Jianlin
author_facet	Lu Fanfan Zhang Wending Huang Ligang Liang Shuhai Mao Dong Gao Feng Mei Ting Zhao Jianlin
author_sort	Lu Fanfan
title	Mode evolution and nanofocusing of grating-coupled surface plasmon polaritons on metallic tip
title_short	Mode evolution and nanofocusing of grating-coupled surface plasmon polaritons on metallic tip
title_full	Mode evolution and nanofocusing of grating-coupled surface plasmon polaritons on metallic tip
title_fullStr	Mode evolution and nanofocusing of grating-coupled surface plasmon polaritons on metallic tip
title_full_unstemmed	Mode evolution and nanofocusing of grating-coupled surface plasmon polaritons on metallic tip
title_sort	mode evolution and nanofocusing of grating-coupled surface plasmon polaritons on metallic tip
publisher	Institue of Optics and Electronics, Chinese Academy of Sciences
publishDate	2018
url	https://doaj.org/article/7a1ae82027d34d8fb2fa144c0dba3b8b
work_keys_str_mv	AT lufanfan modeevolutionandnanofocusingofgratingcoupledsurfaceplasmonpolaritonsonmetallictip AT zhangwending modeevolutionandnanofocusingofgratingcoupledsurfaceplasmonpolaritonsonmetallictip AT huangligang modeevolutionandnanofocusingofgratingcoupledsurfaceplasmonpolaritonsonmetallictip AT liangshuhai modeevolutionandnanofocusingofgratingcoupledsurfaceplasmonpolaritonsonmetallictip AT maodong modeevolutionandnanofocusingofgratingcoupledsurfaceplasmonpolaritonsonmetallictip AT gaofeng modeevolutionandnanofocusingofgratingcoupledsurfaceplasmonpolaritonsonmetallictip AT meiting modeevolutionandnanofocusingofgratingcoupledsurfaceplasmonpolaritonsonmetallictip AT zhaojianlin modeevolutionandnanofocusingofgratingcoupledsurfaceplasmonpolaritonsonmetallictip
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Mode evolution and nanofocusing of grating-coupled surface plasmon polaritons on metallic tip

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