Abstract

In this paper, the optical properties of two small silver metallic nanoparticles (sAgNPs) coupled to a quantum dot (QD) are studied. The interaction between sAgNP and QD is investigated theoretically using the compact density matrix method. In this paper, due to the small size of the AgNP, the dielectric function does not follow the classical models and quantum-size effects must be considered. The excitation of surface plasmons in sAgNP is observed using the finite element method. The main result of the current study shows that when AgNPs are small, the absorption spectrum profile of the QD is strongly affected due to the plasmon–exciton–plasmon interaction. The absorption spectrum profile of the QD shows an electromagnetically induced transparency with two peaks and a minimum in the transition frequency. Then, the near-field enhancement of the sAgNP, the field experienced by the QD, the exciton transition energy shift, and the Förster-enhanced broadening of the excitonic transition are also examined.

Graphic Abstract

中文翻译：

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介电函数的量子校正对等离激元-激子-等离激元混合系统光学性质的影响

摘要

在本文中，研究了两个与量子点（QD）耦合的小银金属纳米颗粒（sAgNPs）的光学性质。使用紧密密度矩阵方法从理论上研究了sAgNP和QD之间的相互作用。在本文中，由于AgNP的尺寸小，介电函数不遵循经典模型，必须考虑量子尺寸效应。使用有限元方法观察到sAgNP中表面等离子体激元的激发。当前研究的主要结果表明，当AgNPs较小时，由于等离激元-激子-等离激元相互作用，量子点的吸收光谱曲线受到强烈影响。QD的吸收光谱图显示了电磁感应的透明性，具有两个峰值和最小的跃迁频率。然后，

图形摘要