Multiple-Wavelength Achromatic Superresolution Focusing with Optimized Constructive Interference

Kun Zhang, Fengliang Dong, Yi Zhou, Zhiwei Song, Lihua Xu, Haifeng Hu, Shaokui Yan, Weiguo Chu, Luru Dai, and Gang Chen

Phys. Rev. Applied 18, 024043 – Published 16 August 2022

Abstract

Recently, there has been growing interest in developing superresolution lenses to focus light beyond the conventional diffraction limit in the far field. Achromatic superresolution is particularly attractive for many practical applications. However, it remains a great challenge to realize an achromatic superresolution focusing lens with both a high numerical aperture and a small depth of focus, which is critical for superresolution imaging with high longitudinal resolution. Here, a method for preparing a multiwavelength achromatic superresolution lens with a high numerical aperture is proposed to control the wave front through a binary-phase zone plate for generating a transverse superresolution focal spot with a small depth of focus. The approach is experimentally verified with an achromatic superresolution lens with a high numerical aperture of 0.95 at six wavelengths in the visible range between 405 and 684 nm. The proposed method is practical for superresolution-related applications, including imaging, microscopy, and data storage.

Received 1 April 2022
Revised 26 May 2022
Accepted 5 July 2022

DOI:https://doi.org/10.1103/PhysRevApplied.18.024043

Physics Subject Headings (PhySH)

Classical optics Interference & diffraction of light

Lenses

Optical microscopy Super-resolution techniques

Atomic, Molecular & OpticalCondensed Matter, Materials & Applied Physics

Authors & Affiliations

Kun Zhang ^1,2, Fengliang Dong^2,3,4, Yi Zhou ^1,*, Zhiwei Song^2,3,4, Lihua Xu^2,3,4, Haifeng Hu^2,3,4, Shaokui Yan¹, Weiguo Chu^2,3,4,†, Luru Dai^2,5,‡, and Gang Chen^1,§

¹Key Laboratory of Optoelectronic Technology and Systems (Chongqing University), Ministry of Education, School of Optoelectronic Engineering, Chongqing University, 174 Shazheng Street, Shapingba, Chongqing 400044, China
²National Center for Nanoscience and Technology, No. 11 Zhong Guan Cun Bei Yi Tiao, Beijing 100190, China
³CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, Nanofabrication Laboratory, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
⁴Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
⁵Key Laboratory of Biomedical Effects of Nanomaterials and Nanosafety, Chinese Academy of Sciences and CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China

^*yi_zhou@cqu.edu.cn
^†wgchu@nanoctr.cn
^‡dai@nanoctr.cn
^§gchen1@cqu.edu.cn

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Issue

Vol. 18, Iss. 2 — August 2022

Subject Areas

Optics

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