卵形微柱产生的光子纳米射流特性研究

Characteristics of photonic nanojet produced by egg-shaped microcolumns

研究表明球形微粒产生的光子纳米射流具有极窄的半高宽,能极大提高透镜分辨率。微粒制备可能导致微球形状不够标准,进而对其光子纳米喷流的特征参数造成影响。文章基于二维时域有限差分(FDTD)方法,仿真计算了卵形微柱产生的光子纳米射流(PNJ)的特性。结果表明入射面和出射面曲率对卵形微柱产生的光子纳米射流具有调控作用,进一步研究了入射光波长和折射率对卵形光子纳米射流的影响。本工作提供了卵形微柱产生的光子纳米射流的特征参数,为以后的工作提供了借鉴。

Studies have shown that the photonic nanojet produced by spherical microparticle has an extremely narrow half-height width and can greatly improve the lens resolution.Microparticle preparation may result in a nonstandard microsphere,which may affect the characteristic parameters of the photonic nanojets.The characteristics of photonic nanojet(PNJ)generated by egg-shaped microcolumn are calculated by the(2D)finite difference time domain(FDTD)method.The results show that the incident and outgoing surface curvature can regulate photonic nanojet generated by eggshaped microcolumn,the effect of the incident light wavelength and refractive index on the photonic nanojet produced by the egg shape is further investigated.This work provides the characteristic parameters of the photonic nanojet generated by egg-shaped microcolumn,which provides a reference for the future work.