Metasurfaces, artificial micro- and nano-photonic structures can modify wavefront of electromagnetic waves to the desired form. Metalenses are the metasurfaces assuming the role of focusing light. The focusing performance of nested gallium-doped zinc oxide nanoring-arrangements functionalized by conformal Talbot effect is investigated for communication wavelength 1550 nm. The Talbot-effect-focusing performance of the 2D finite-sized structures are computationally demonstrated in a systematically manner. The impact of geometrical parameters on the primary focal spot and focusing performance parameters such as numerical aperture, full-width half-maximum, focal depth, efficiency, and fill-factor is examined and summarized via finite difference time-domain numerical simulations. All samples presenting an alternative plasmonic option in this work yield a good focusing efficiency of >50%, absolute efficiency of >19%, numerical aperture up to 0.67, focal depth up to 1.4 times of focal length, and a wide focal spot size up to 6.0654 times of operating wavelength. As a result of finite-sized construction, conformal Talbot effect is examined from a novel alternative plasmonics perspective. Thus, a new planarized focusing platform is employed by using a nanostructured microlens, acting conformal transformation optics devices with low-cost and light capturing tolerance.

超表面，人造微光子和纳米光子结构可以将电磁波的波阵面修改为所需的形式。Metalenses是承担聚光作用的超表面。研究了通过共形塔尔伯特效应功能化的嵌套镓掺杂的氧化锌纳米环结构在1550 nm通信波长下的聚焦性能。二维有限尺寸结构的Talbot效应聚焦性能以系统方式进行了计算证明。通过有限差分时域数值模拟检查并总结了几何参数对主要焦点和聚焦性能参数（如数值孔径，半角全宽，焦深，效率和填充因子）的影响。所有在这项工作中提供替代等离激元选项的样品均可产生良好的聚焦效率，> 50％，绝对效率> 19％，数值孔径高达0.67，焦深高达焦距的1.4倍，焦距宽达到工作波长的6.0654倍。作为有限尺寸构造的结果，从新颖的等离激元学角度研究了保形塔尔伯特效应。因此，通过使用纳米结构的微透镜，采用了一种新型的平面化聚焦平台，其作用是具有低成本和光捕获容限的共形变换光学器件。从新颖的等离激元学角度研究了保形塔尔博特效应。因此，通过使用纳米结构的微透镜，采用了一种新型的平面化聚焦平台，该共轭转换光学器件具有低成本和光捕获容限。从新颖的等离激元学角度研究了保形塔尔博特效应。因此，通过使用纳米结构的微透镜，采用了一种新型的平面化聚焦平台，该共轭转换光学器件具有低成本和光捕获容限。