A significant challenge for plasmonics as an enabling technology for energy harvesting and conversion processing is the active control of light on the nanoscale. By exploiting the resonant absorption spectra of silver nanoparticle dimer array, the theoretical results show that the resonant transverse mode and longitudinal mode is defined by the direction of dipole moment. Both of this two kind of plasmonic coupling mode induces continuous power flow around the nanoparticle, namely an analogy of pseudo-optical fluid. The direction of the circulating optical energy is governed by the spatial phase reversal of the Poynting vector. Based on the hydrodynamic theory, the negative pressure of photon is proposed to describe the intensely accumulated energy within a nanoscale volume, and the significant energy density satisfies the forming condition of pseudo-optical fluid. The analytical assumptions build the bridge for the electrodynamics and hydrodynamics to achieve dynamically-tunable and switchable vortex-operated plasmonic nanodevice for subwavelength waveguides, high-energy batteries and laser light sources.

作为能量收集和转换处理的使能技术，等离激元技术面临的一项重大挑战是对纳米级光的主动控制。通过利用银纳米粒子二聚体阵列的共振吸收光谱，理论结果表明，共振横模和纵模由偶极矩的方向定义。这两种等离子体耦合模式都引起围绕纳米粒子的连续功率流，即伪光学流体的类比。循环光能的方向由Poynting向量的空间相位反转控制。基于流体力学理论，提出了光子的负压，以描述纳米级体积内的强烈积累的能量，显着的能量密度满足伪光学流体的形成条件。分析假设为电动力学和流体动力学搭建了桥梁，以实现用于亚波长波导，高能电池和激光光源的动态可调和可切换的涡旋等离子体纳米器件。