Luo Hao, Yu Haibo, Wen Yangdong, Zhang Tianyao, Li Pan, Wang Feifei, Liu Lianqing
Opt Lett. 2020 Jun 1;45(11):2981-2984. doi: 10.1364/OL.393041.
Most microsphere-assisted super-resolution imaging experiments require a high-refractive-index microsphere to be immersed in a liquid to improve the super-resolution. However, samples are inevitably polluted by residuals in the liquid. This Letter presents a novel (to the best of our knowledge) method employing a microsphere lens group (MLG) that can easily achieve high-quality super-resolution imaging in air. The performance of this method is at par or better than that of the high-refractive-index microspheres immersed in liquid. In addition, the MLG generates a real image that is closely related to the photonic nanojet position of the microsphere super-lens. This imaging method is beneficial in microsphere imaging applications where liquids are impractical.
大多数微球辅助超分辨率成像实验需要将高折射率微球浸入液体中以提高超分辨率。然而，样品不可避免地会被液体中的残留物污染。本文提出了一种新颖的（据我们所知）方法，该方法采用微球透镜组（MLG），可以在空气中轻松实现高质量的超分辨率成像。该方法的性能与浸入液体中的高折射率微球相当或更好。此外，MLG会生成一个与微球超透镜的光子纳米射流位置密切相关的实像。这种成像方法在液体不适用的微球成像应用中很有用。
