For the first time, herein, we report the theoretical investigation on short and elongated photonic nanojets (PNJs) generated by single solid/hollow core-shell microparticles illuminated with focused Gaussian beams (FGBs). This investigation is carried out using developed analytical equations based on Bromwich formalism. The effect of the beam waist, thickness of shell, size and refractive index of the microparticle on the characteristic parameters of the PNJs such as maximum electric field enhancement, spatial separation between the PNJs, and length of the PNJs is studied in detail. The electric field enhancement values of the PNJs upon FGB illumination are compared to those obtained from the plane wave illumination.

在这里，我们首次报告了由聚焦高斯光束（FGB）照射的单个固体/空心核壳微粒产生的短而细长的光子纳米射流（PNJ）的理论研究。使用基于Bromwich形式主义的发达分析方程式进行了这项研究。详细研究了束腰，外壳厚度，微粒尺寸和折射率对PNJs特性参数的影响，例如最大电场增强，PNJs之间的空间间隔以及PNJs的长度。将在FGB照明下PNJ的电场增强值与从平面波照明获得的电场增强值进行比较。