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Title: Diffraction-limited imaging with monolayer 2D material-based ultrathin flat lenses
Authors: Lin, Han
Xu, Zai-Quan
Cao, Guiyuan
Zhang, Yupeng
Zhou, Jiadong
Wang, Ziyu
Wan, Zhichen
Liu, Zheng
Loh, Kian Ping
Qiu, Cheng-Wei
Bao, Qiaoliang
Jia, Baohua
Keywords: Engineering::Materials
Issue Date: 2020
Source: Lin, H., Xu, Z., Cao, G., Zhang, Y., Zhou, J., Wang, Z., Wan, Z., Liu, Z., Loh, K. P., Qiu, C., Bao, Q. & Jia, B. (2020). Diffraction-limited imaging with monolayer 2D material-based ultrathin flat lenses. Light: Science and Applications, 9(1).
Project: NRF-CRP22–2019–0006
Journal: Light: Science and Applications
Abstract: Ultrathin flat optics allow control of light at the subwavelength scale that is unmatched by traditional refractive optics. To approach the atomically thin limit, the use of 2D materials is an attractive possibility due to their high refractive indices. However, achievement of diffraction-limited focusing and imaging is challenged by their thickness-limited spatial resolution and focusing efficiency. Here we report a universal method to transform 2D monolayers into ultrathin flat lenses. Femtosecond laser direct writing was applied to generate local scattering media inside a monolayer, which overcomes the longstanding challenge of obtaining sufficient phase or amplitude modulation in atomically thin 2D materials. We achieved highly efficient 3D focusing with subwavelength resolution and diffraction-limited imaging. The high focusing performance even allows diffraction-limited imaging at different focal positions with varying magnifications. Our work paves the way for downscaling of optical devices using 2D materials and reports an unprecedented approach for fabricating ultrathin imaging devices.
ISSN: 2095-5545
DOI: 10.1038/s41377-020-00374-9
Rights: © 2020 The Author(s). This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license,and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit
Fulltext Permission: open
Fulltext Availability: With Fulltext
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