[1] Strano, G. Galileo's telescope: history, scientific analysis, and replicated observations. Exp. Astron. 25, 17-31 (2009).
[2] Rubinsztein-Dunlop, H. et al. Roadmap on structured light. J. Opt. 19, 013001 (2017). doi: 10.1088/2040-8978/19/1/013001
[3] Rosales-Guzmán, C., Ndagano, B. & Forbes, A. A review of complex vector light fields and their applications. J. Opt. 20, 123001 (2018). doi: 10.1088/2040-8986/aaeb7d
[4] Padgett, M. J. Orbital angular momentum 25 years on [Invited]. Opt. Express 25, 11265-11274 (2017). doi: 10.1364/OE.25.011265
[5] Shen, Y. J. et al. Optical vortices 30 years on: OAM manipulation from topological charge to multiple singularities. Light Sci. Appl. 8, 90 (2019). doi: 10.1038/s41377-019-0194-2
[6] Wang, J. Twisted optical communications using orbital angular momentum. Sci. China Phys. Mech. Astron. 62, 34201 (2019). doi: 10.1007/s11433-018-9260-8
[7] Erhard, M. et al. Twisted photons: new quantum perspectives in high dimensions. Light Sci. Appl. 7, 17146 (2018). doi: 10.1038/lsa.2017.146
[8] Berkhout, G. C. G. et al. Efficient sorting of orbital angular momentum states of light. Phys. Rev. Lett. 105, 153601 (2010). doi: 10.1103/PhysRevLett.105.153601
[9] Wen, Y. H. et al. Spiral transformation for high-resolution and efficient sorting of optical vortex modes. Phys. Rev. Lett. 120, 193904 (2018). doi: 10.1103/PhysRevLett.120.193904
[10] Fontaine, N. K. et al. Laguerre-Gaussian mode sorter. Nat. Commun. 10, 1865 (2019). doi: 10.1038/s41467-019-09840-4
[11] Sahu, R. et al. Angular lens. Opt. Express 26, 8709-8718 (2018).
[12] Guo, Y. H. et al. Spin-decoupled metasurface for simultaneous detection of spin and orbital angular momenta via momentum transformation. Light Sci. Appl. 10, 63 (2021). doi: 10.1038/s41377-021-00497-7
[13] Capasso, F. The future and promise of flat optics: a personal perspective. Nanophotonics 7, 953-957 (2018). doi: 10.1515/nanoph-2018-0004
[14] Chen, W. T. et al. A broadband achromatic metalens for focusing and imaging in the visible. Nat. Nanotechnol. 13, 220-226 (2018). doi: 10.1038/s41565-017-0034-6
[15] Sroor, H. et al. High-purity orbital angular momentum states from a visible metasurface laser. Nat. Photonics 14, 498-503 (2020). doi: 10.1038/s41566-020-0623-z
[16] Larocque, H. et al. Generalized optical angular momentum sorter and its application to high-dimensional quantum cryptography. Opt. Express 25, 19832-19843 (2017). doi: 10.1364/OE.25.019832
[17] Ruffato, G. et al. Total angular momentum sorting in the telecom infrared with silicon Pancharatnam-Berry transformation optics. Opt. Express 27, 15750-15764 (2019). http://www.ncbi.nlm.nih.gov/pubmed/31163766
[18] Lei, T. et al. High-resolution cylindrical vector beams sorting based on spin-dependent fan-out optical geometric transformation. Opt. Express 27, 20901-20909 (2019). http://www.ncbi.nlm.nih.gov/pubmed/31510177
[19] Wang, B. M. et al. Sorting full angular momentum states with Pancharatnam-Berry metasurfaces based on spiral transformation. Opt. Express 28, 16342-16351 (2020). http://www.researchgate.net/publication/341307498_Sorting_full_angular_momentum_states_with_Pancharatnam-Berry_metasurfaces_based_on_spiral_transformation