Yan Bing, Yue Liyang, Norman Monks James, Yang Xibin, Xiong Daxi, Jiang Chunlei, Wang Zengbo
Opt Lett. 2020 Mar 1;45(5):1168-1171. doi: 10.1364/OL.380574.
A high-performance all-dielectric lens, formed by integrating a conventional plano-convex lens with a high-index microsphere lens (PCM), was developed for far-field super-resolution applications. The PCM lens features a theoretical resolution of $\sim\lambda /{2.5}$∼λ/2.5 in air with a WD $\sim 2;{\unicode{x00B5} \rm m}$∼2µm away from the lens. When combined with a femtosecond laser, the actual patterning resolution can reach $\sim\lambda /{3.5}$∼λ/3.5. The unusual focusing properties were theoretically and experimentally verified, and direct laser nano-writing of arbitrary patterns and nanostructures on various substrates was demonstrated. This Letter can be naturally extended to other super-resolution applications, including imaging, sensing, and trapping, with the potential of developing next-generation low-cost direct laser nano-marking machine and super-resolution imaging nanoscope.
通过将传统平凸透镜与高折射率微球透镜（PCM）集成而形成的高性能全介质透镜，被开发用于远场超分辨率应用。PCM透镜在空气中理论分辨率约为$\sim\lambda /{2.5}$，在距透镜约$2;{\unicode{x00B5} \rm m}$处的工作距离约为$\sim 2;{\unicode{x00B5} \rm m}$。当与飞秒激光结合时，实际图案化分辨率可达到$\sim\lambda /{3.5}$。通过理论和实验验证了其异常的聚焦特性，并展示了在各种基板上直接激光纳米写入任意图案和纳米结构的能力。这封信可以自然地扩展到其他超分辨率应用，包括成像、传感和捕获，具有开发下一代低成本直接激光纳米标记机和超分辨率成像纳米显微镜的潜力。
