量子电子学报, 2018, 35 (1): 1, 网络出版: 2018-01-30
基于小孔-Tamm复合结构的荧光增强与定向辐射
Fluorescence enhancement and directional radiation based on hybrid aperture-Tamm structure
微纳光学 Tamm结构 荧光增强 定向辐射 micro-nano optics Tamm structure fluorescence enhancement directional emission
摘要
基于转移矩阵法分析了Tamm结构中的电磁场分布与共振模式,提出了小 孔-Tamm复合结构来增强荧光信号及控制辐射方向。用时域有限差分法 (FDTD)模拟了偶极子与该小孔-Tamm复合结构相互作用的耦合辐射场的远 场辐射,证明了该结构能够实现荧光的垂直出射,且与传统的Tamm结构相 比,其荧光强度有三个数量级的提高;系统地分析比较了荧光发射波长、 偶极子位置及小孔尺寸、形状对荧光辐射角度和强度的影响。模拟结果对 具有荧光增强定向辐射功能的光学芯片设计有指导作用。
Abstract
Electromagnetic field distribution and resonance modes in Tamm structure are analyzed based on transfer matrix method, and a hybrid aperture-Tamm structure is proposed to enhance the fluorescence signal and control the emission direction. The finite difference time domain (FDTD) method is used to simulate the far field emission of dipole source interacted with hybrid aperture-Tamm structure. It is proved that this structure can realize the vertical ejection of fluorescence and the fluorescence intensity increases by three orders of magnitude compared with the conventional Tamm structure. Influences of fluorescence emission wavelength, position of dipole source, the size and shape of aperture on radiation angle and intensity are systematically analyzed and compared. Simulation results can be used as a guide for the optical chip design with fluorescence enhanced directional radiation function.
邱冬, 王勇, 朱良富, 张斗国, 明海. 基于小孔-Tamm复合结构的荧光增强与定向辐射[J]. 量子电子学报, 2018, 35(1): 1. QIU Dong, WANG Yong, ZHU Liangfu, ZHANG Douguo, MING Hai. Fluorescence enhancement and directional radiation based on hybrid aperture-Tamm structure[J]. Chinese Journal of Quantum Electronics, 2018, 35(1): 1.