Study on Localized Surface Plasmon Coupling with Many Radiators

Localized surface plasmon (LSP) coupling with many radiators are investigated. The LSP is generated by excitation of laser or electron beam on the random Ag nano particles (NPs) and arrayed ones embedded in the p-GaN of green LEDs. They couple with the excitons or radiative recombination in the quan...

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Autores principales:	Zhizhong Chen, Chuhan Deng, Xin Xi, Yifan Chen, Yulong Feng, Shuang Jiang, Weihua Chen, Xiangning Kang, Qi Wang, Guoyi Zhang, Bo Shen
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	localized surface plasmon light emitting diode dipole many radiators cathodoluminescence perturbation method Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/85f7a949e1c44ed0a64ebb02d9c44192
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spelling	oai:doaj.org-article:85f7a949e1c44ed0a64ebb02d9c441922021-11-25T18:32:30ZStudy on Localized Surface Plasmon Coupling with Many Radiators10.3390/nano111131052079-4991https://doaj.org/article/85f7a949e1c44ed0a64ebb02d9c441922021-11-01T00:00:00Zhttps://www.mdpi.com/2079-4991/11/11/3105https://doaj.org/toc/2079-4991Localized surface plasmon (LSP) coupling with many radiators are investigated. The LSP is generated by excitation of laser or electron beam on the random Ag nano particles (NPs) and arrayed ones embedded in the p-GaN of green LEDs. They couple with the excitons or radiative recombination in the quantum well (QW) and electron beam, which enhance or suppress the luminescence of the radiators. The photoluminescence (PL) intensity of periodic Ag NPs can get as much as 4.5 times higher than that of bare LED. In addition to the periodic structure, the morphology of Ag NPs also affects the localized SP (LSP) resonance intensity and light scattering efficiency. In the finite difference time domain (FDTD) simulation, five x-polarized dipoles are approximated to five quantum wells. Considering the interaction between the five dipoles and their feedback effect on LSP, the enhancement effect of SP dipole coupling with Ag NPs is amplified and the energy dissipation is reduced. The enhancement of cathodoluminescence (CL) was also found in green LEDs with Ag NPs. The three-body model composed of two orthogonal dipoles and an Ag NP is used for 3D FDTD simulation. The LSP-QWs coupling effect is separated from the electron beam (e-beam)-LSP-QW system by linear approximation. Under the excitation of electron beam, the introduction of z-dipole greatly reduces the energy dissipation. In the cross-sectional sample, z-polarized dipoles in QWs show more coupling strength to the dipole and quadrupole modes of LSP. The perturbation theory is used to separate the LSP coupling effects to x-dipole and z-dipole. At last, the resonator and the antenna effects are discussed for LSP coupling at different positions to the Ag NP.Zhizhong ChenChuhan DengXin XiYifan ChenYulong FengShuang JiangWeihua ChenXiangning KangQi WangGuoyi ZhangBo ShenMDPI AGarticlelocalized surface plasmonlight emitting diodedipolemany radiatorscathodoluminescenceperturbation methodChemistryQD1-999ENNanomaterials, Vol 11, Iss 3105, p 3105 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	localized surface plasmon light emitting diode dipole many radiators cathodoluminescence perturbation method Chemistry QD1-999
spellingShingle	localized surface plasmon light emitting diode dipole many radiators cathodoluminescence perturbation method Chemistry QD1-999 Zhizhong Chen Chuhan Deng Xin Xi Yifan Chen Yulong Feng Shuang Jiang Weihua Chen Xiangning Kang Qi Wang Guoyi Zhang Bo Shen Study on Localized Surface Plasmon Coupling with Many Radiators
description	Localized surface plasmon (LSP) coupling with many radiators are investigated. The LSP is generated by excitation of laser or electron beam on the random Ag nano particles (NPs) and arrayed ones embedded in the p-GaN of green LEDs. They couple with the excitons or radiative recombination in the quantum well (QW) and electron beam, which enhance or suppress the luminescence of the radiators. The photoluminescence (PL) intensity of periodic Ag NPs can get as much as 4.5 times higher than that of bare LED. In addition to the periodic structure, the morphology of Ag NPs also affects the localized SP (LSP) resonance intensity and light scattering efficiency. In the finite difference time domain (FDTD) simulation, five x-polarized dipoles are approximated to five quantum wells. Considering the interaction between the five dipoles and their feedback effect on LSP, the enhancement effect of SP dipole coupling with Ag NPs is amplified and the energy dissipation is reduced. The enhancement of cathodoluminescence (CL) was also found in green LEDs with Ag NPs. The three-body model composed of two orthogonal dipoles and an Ag NP is used for 3D FDTD simulation. The LSP-QWs coupling effect is separated from the electron beam (e-beam)-LSP-QW system by linear approximation. Under the excitation of electron beam, the introduction of z-dipole greatly reduces the energy dissipation. In the cross-sectional sample, z-polarized dipoles in QWs show more coupling strength to the dipole and quadrupole modes of LSP. The perturbation theory is used to separate the LSP coupling effects to x-dipole and z-dipole. At last, the resonator and the antenna effects are discussed for LSP coupling at different positions to the Ag NP.
format	article
author	Zhizhong Chen Chuhan Deng Xin Xi Yifan Chen Yulong Feng Shuang Jiang Weihua Chen Xiangning Kang Qi Wang Guoyi Zhang Bo Shen
author_facet	Zhizhong Chen Chuhan Deng Xin Xi Yifan Chen Yulong Feng Shuang Jiang Weihua Chen Xiangning Kang Qi Wang Guoyi Zhang Bo Shen
author_sort	Zhizhong Chen
title	Study on Localized Surface Plasmon Coupling with Many Radiators
title_short	Study on Localized Surface Plasmon Coupling with Many Radiators
title_full	Study on Localized Surface Plasmon Coupling with Many Radiators
title_fullStr	Study on Localized Surface Plasmon Coupling with Many Radiators
title_full_unstemmed	Study on Localized Surface Plasmon Coupling with Many Radiators
title_sort	study on localized surface plasmon coupling with many radiators
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/85f7a949e1c44ed0a64ebb02d9c44192
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_version_	1718411028451033088

Study on Localized Surface Plasmon Coupling with Many Radiators

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