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1. Asymmetric light control with nonlinear metasurfaces [S. Kruk and Y. Kivshar / Australian National University; Image by Ella Maru Studio]
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2. Wavelength multiplexing for quantum networks [H-H. Lu et al. / Oak Ridge National Laboratory, Purdue University and SRI International; Image by Y.-Y. Pai]
![](https://opn-web-afd-d3bfbkd5bcc5asbs.z02.azurefd.net/opn/media/images/articles/2023/0323/departments/visualcoverpoll_3.jpg?t=638452552023204760)
3. Magnetic-free Si3N4 integrated optical isolator [H. Tian et al. / Purdue University and EPFL; Image by R. Allen and P. Allen, Second Bay Studios]
![](https://opn-web-afd-d3bfbkd5bcc5asbs.z02.azurefd.net/opn/media/images/articles/2023/0323/departments/visualcoverpoll_4.jpg?t=638452552026360059)
4. Coupled resonators twist the flow of light [Y. Hu and M. Lončar / Harvard University]
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5. 3D zero-order imaging—a new holographic principle [A. Goncharsky et al. / M.V. Lomonosov Moscow State University and Moscow Computer Holography Centre]
![](https://opn-web-afd-d3bfbkd5bcc5asbs.z02.azurefd.net/opn/media/images/articles/2023/0323/departments/visualcoverpoll_6.jpg?t=638452552032051340)
6. Multimodal handheld intraoral OCT and angiography [H.M. Subhash et al. / Colgate Palmolive and University of Washington Seattle; Image by N. Le and H.M. Subhash]
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7. Distributed Brillouin fiber laser sensor [J.B. Murray et al. / US Naval Research Laboratory and Sandia National Laboratories; Image by J.B. Murray]
![](https://opn-web-afd-d3bfbkd5bcc5asbs.z02.azurefd.net/opn/media/images/articles/2023/0323/departments/visualcoverpoll_8.jpg?t=638452552038810735)
8. Metasurfaces boost color-imaging sensitivity [M. Miyata et al. / NTT Device Technology Laboratories; Image by M. Miyata]
![](https://opn-web-afd-d3bfbkd5bcc5asbs.z02.azurefd.net/opn/media/images/articles/2023/0323/departments/visualcoverpoll_9.jpg?t=638452552041835444)
9. Lithium niobate isolators outperform magneto-optics [O.E. Örsel et al. / University of Illinois]
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10. Toroidal vortices of light [C. Wan et al. / Univ. of Shanghai for Sci. and Technol., Zhangjiang Lab. and Pusan Natl. Univ.]
![](https://opn-web-afd-d3bfbkd5bcc5asbs.z02.azurefd.net/opn/media/images/articles/2023/0323/departments/visualcoverpoll_11.jpg?t=638452552017195716)
11. Two-photon machining of sensors on fiber tips [J. Williams et al. / Air Force Institute of Technology and AFRL, Wright–Patterson AFB]
View all of the “Optics in 2022” research summaries:
optica-opn.org/optics-in-2022.