The phenomenon of reversed radiation pressure on free electrons in a nanoparticle requires the necessary but insufficient condition that the real part of the particle’s permittivity be negative. It is shown that Rayeigh scattering theory is adequate for modeling the phenomenon by favorable comparison with Mie theory for single particles. A multiparticle Rayleigh scattering approach demonstrates that the radiation attraction of free electrons is enhanced by the interaction of closely spaced particles when the nanoparticles are in close proximity and separated along the incident wave polarization direction. However, the negative force on free carriers is reduced when the particles are aligned perpendicular to the incident electric field polarization. The accompanying increased radiation force on the material bound carriers is proposed as a step toward understanding how nanostructured materials and surfaces exhibiting reversed internal optical momentum can be designed with interacting nanoparticles for enhanced propulsion due to the ejection of hot electrons.

中文翻译：

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纳米粒子中自由载流子上增强的辐射压力逆转和瑞利体制中的极化依赖性

纳米粒子中自由电子上的反向辐射压力现象需要必要但不充分的条件，即粒子介电常数的实部为负。通过与单粒子的Mie理论进行有利的比较，表明Rayeigh散射理论足以对现象进行建模。多粒子瑞利散射方法表明，当纳米粒子紧密靠近并沿入射波偏振方向分离时，紧密间隔的粒子会增强自由电子的辐射吸引力。但是，当粒子垂直于入射电场极化排列时，对自由载流子的负作用力会减小。