Far‐Field Superresolution Imaging via Spatial Frequency Modulation,Laser & Photonics Reviews

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Far‐Field Superresolution Imaging via Spatial Frequency Modulation
Laser & Photonics Reviews ( IF 9.8 ) Pub Date : 2020-09-03 , DOI: 10.1002/lpor.201900011
Mingwei Tang ₁ , Xiaowei Liu ₁ , Zhong Wen ₁ , Feihong Lin ₁ , Chao Meng ₁ , Xu Liu ₁ , Yaoguang Ma ₁ , Qing Yang _{1,

2}

Affiliation

The diffraction limit substantially impedes the resolution of the conventional optical microscope. Under traditional illumination, the high‐spatial‐frequency light corresponding to the subwavelength information of objects is located in the near‐field in the form of evanescent waves, and thus not detectable by conventional far‐field objectives. Recent advances in nanomaterials and metamaterials provide new approaches to break this limitation by utilizing large‐wavevector evanescent waves. Here, a comprehensive review of this emerging and fast‐growing field is presented. The current superresolution imaging techniques based on evanescent‐wave‐assisted spatial frequency modulation, including hyperlens, microsphere lens, and evanescent field‐illuminated spatial frequency shift microscopy, are illustrated. They are promising in investigating unobserved details and processes in fields such as medicine, biology, and material research. Some current challenges and future possibilities of these superresolution methods are also discussed.

中文翻译：

通过空间频率调制进行远场超分辨率成像

衍射极限实质上阻碍了常规光学显微镜的分辨率。在传统照明下，与物体亚波长信息相对应的高空间频率光以waves逝波的形式位于近场中，因此常规远场物镜无法检测到。纳米材料和超材料的最新进展提供了利用大波矢vector逝波突破这一局限的新方法。在这里，将对这个新兴且快速发展的领域进行全面的回顾。说明了当前基于e逝波辅助空间频率调制的超分辨率成像技术，包括超透镜，微球透镜和e逝场照明的空间频移显微镜。他们有望在医学，生物学和材料研究等领域研究未发现的细节和过程。还讨论了这些超分辨率方法的当前挑战和未来可能性。

更新日期：2020-11-12

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