We demonstrate analytically the technique and arrangement of nanoparticle antenna arrays with the enhancement of optical characteristics at an optical frequency regime. The optical characteristics of the array are enhanced by introducing an inverse active spherical coated nanoparticle (I-CNP). This inverse active spherical coated nanoparticle is designed and combined with already demonstrated active CNPs. Consequently, three types of active CNPs and their inverse-based plasmonic nano-antenna array configurations have been designed and studied: two CNP configurations, two inverse CNP (I-CNP) configurations and a CNP with an I-CNP configuration in the presence of passive elements. Detailed near-field analysis contains an E-field, radiated power, scattering and absorption examination, whereas far-field analysis includes gain and pattern investigation. The finite-difference time-domain (FDTD) simulation results in CST depict the benefits of a CNP with an I-CNP array configuration in the presence of passive elements over the other two in terms of both near-field and far-field characteristics, at closer inter-element distances because of coupling avoidance with possession of a dipolar pattern.

中文翻译：

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通过在阵列元件中添加反向有源核壳纳米粒子来增强纳米天线阵列的光学特性

我们分析地展示了纳米粒子天线阵列的技术和排列，并在光学频率范围内增强了光学特性。通过引入反向活性球形涂层纳米颗粒 (I-CNP) 增强了阵列的光学特性。这种反活性球形涂层纳米颗粒是设计并与已经证明的活性 CNP 结合的。因此，已经设计和研究了三种类型的有源 CNP 及其基于反向的等离子体纳米天线阵列配置：两种 CNP 配置、两种反向 CNP (I-CNP) 配置和具有 I-CNP 配置的 CNP。被动元素。详细的近场分析包括电场、辐射功率、散射和吸收检查，而远场分析包括增益和模式调查。