纳米级银半球调制的电偶极子的表面等离子体增强荧光发射
Plasmon-Enhanced Fluorescence Emission of an Electric Dipole Modulated by a Nanoscale Silver Hemisphere.
作者信息
Lv Jiangtao, Chang Minghui, Gu Qiongchan, Ying Yu, Si Guangyuan
机构信息
College of Information Science and Engineering, Northeastern University, Shenyang 110004, China.
Hebei Key Laboratory of Micro-Nano Precision Optical Sensing and Measurement Technology, Qinhuangdao 066004, China.
出版信息
Nanomaterials (Basel). 2022 Sep 3;12(17):3070. doi: 10.3390/nano12173070.
The spontaneous emission of a fluorophore is altered by the surrounding electromagnetic field. Therefore, the radiation of the fluorophore can be engineered by inter-coupling with the nanoscale plasmons. This work proposes a nanoscale hemisphere structure that enhances the electric field and further modulates its effects on fluorophores by adjusting the radius of the hemisphere. A full-wave simulation is carried out using the finite element method, and the radiation characteristics of the nanoscale hemisphere are studied in detail. Compared with free space, the structure has generated significant enhancement exceeding 30. Through curve fitting, the relationship between the enhanced peak wavelength and the radius of the hemisphere is obtained.
荧光团的自发发射会受到周围电磁场的影响。因此，可以通过与纳米级等离子体激元相互耦合来设计荧光团的辐射。这项工作提出了一种纳米级半球结构，该结构通过调整半球半径来增强电场，并进一步调节其对荧光团的影响。使用有限元方法进行了全波模拟，并详细研究了纳米级半球的辐射特性。与自由空间相比，该结构产生了超过30的显著增强。通过曲线拟合，得到了增强峰值波长与半球半径之间的关系。
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