Study on the Coupling Mechanism of the Orthogonal Dipoles with Surface Plasmon in Green LED by Cathodoluminescence.
Study on the Coupling Mechanism of the Orthogonal Dipoles with Surface Plasmon in Green LED by Cathodoluminescence.
复制标题
阴极发光绿色LED中正交偶极子与表面等离子体耦合机制的研究
DOI：
10.3390/nano8040244
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发表时间：
2018-04-16
期刊：
影响因子：
--
通讯作者：
Shen B
中科院分区：
文献类型：
--
作者：
Feng Y;Chen Z;Jiang S;Li C;Chen Y;Zhan J;Chen Y;Nie J;Jiao F;Kang X;Li S;Yu T;Zhang G;Shen B
利用阴极发光（CL）分析了银纳米颗粒（NP）填充在光子晶体（PhC）孔中的绿色发光二极管（LED）中局域表面等离子体激元（LSP）与量子威尔斯（QW）之间的耦合行为。对于具有Ag NP阵列的相同绿色LED样品，获得了光致发光（PL）抑制和CL增强。时间分辨光致发光（TRPL）的结果表明LSP和量子阱之间的强耦合。三维（3D）时域有限差分（FDTD）模拟使用的三体模型组成的两个正交的偶极子和一个单一的银NP。通过线性近似，将LSP-QW耦合效应从电子束-LSP-QW系统中分离出来。在电子束激发下引入z-偶极子显著降低了能量耗散。本文讨论了耦合机理，提出了一种新型的发射结构。
We analyzed the coupling behavior between the localized surface plasmon (LSP) and quantum wells (QWs) using cathodoluminescence (CL) in a green light-emitting diodes (LED) with Ag nanoparticles (NPs) filled in photonic crystal (PhC) holes. Photoluminescence (PL) suppression and CL enhancement were obtained for the same green LED sample with the Ag NP array. Time-resolved PL (TRPL) results indicate strong coupling between the LSP and the QWs. Three-dimensional (3D) finite difference time domain (FDTD) simulation was performed using a three-body model consisting of two orthogonal dipoles and a single Ag NP. The LSP–QWs coupling effect was separated from the electron-beam (e-beam)–LSP–QW system by linear approximation. The energy dissipation was significantly reduced by the z-dipole introduction under the e-beam excitation. In this paper, the coupling mechanism is discussed and a novel emission structure is proposed.
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