We theoretically study the optical properties of a hybrid structure consisting of a metal nanoparticle (MNP) and an asymmetric double semiconductor quantum dot (SQD) molecule, which are coupled together, via long-range Coulomb interaction. We derive and solve numerically the relevant density-matrix equations and use electromagnetic calculations to evaluate the energy absorption rate of the MNP and the asymmetric double SQD molecule, separately, as well as, the total absorption rate for the entire hybrid structure, as a function of the energy of an applied electromagnetic field, for two different applied field polarization directions. We also investigate the impact of the applied field intensity and the electron tunnelling coupling rate on the spectral profiles, for several values of the interparticle distance. The Autler-Townes splitting and double nonlinear Fano effects are obtained in the absorption spectra of the asymmetric double SQD molecule, the MNP and the total system.

我们从理论上研究了由金属纳米粒子(MNP) 和不对称双半导体量子点 (SQD) 分子组成的混合结构的光学特性，它们通过长程库仑相互作用耦合在一起。我们推导出并数值求解相关的密度矩阵方程，并使用电磁计算分别评估 MNP 和不对称双 SQD 分子的能量吸收率，以及整个混合结构的总吸收率，作为函数对于两个不同的外加场极化方向，外加电磁场的能量。我们还研究了外加场强的影响和对于粒子间距离的几个值，光谱轮廓上的电子隧道耦合率。在不对称双SQD分子、MNP和整个系统的吸收光谱中获得了Autler-Townes分裂和双非线性Fano效应。