基于准正则模理论,分别考虑金属中自由电子的局域光响应模型、流体动力学模型和广义非局域光学响应模型,研究纳米双柱结构中二能级原子的 自发辐射增强特性.利用耦合模理论,研究二能级原子所处位置和双柱间隙对自发辐射增强特性的影响.结果表明,相较于全波仿真方法,准正则模方法可准确高效地计算表面等离激元纳米双柱结构中原子的自发辐射增强谱,原子所处位置和纳米柱间隙均对准正则模式共振频率产生重要影响.
Based on the quasi-normal mode(QNM)theory,in the local photoresponse model,fluid dynam-ics model and generalized non-local photoresponse model of free electrons in metals,the spontaneous e-mission enhancement characteristics of two-level atoms in the nano-column structure are studied.With efficient coupled QNM theory,the effects of quantum dot position and double-column gap distance on the enhancement properties of spontaneous emission are investigated.The results show that compared with the full-wave method,the quasi-canonical mode method can efficiently and accurately calculate the en-hanced characteristics of spontaneous emission,and the nanopillar gap has an important influence on the resonance frequency of the quasi-canonical mode.These studies have important guiding significance for understanding the nanoscale dimer structure to enhance light-matter interaction.