[1] O'' Shea D C, Suleski T J, Kathman A D, et al. Diffractive Optics: Design, Fabrication, Test[M]. Washington: SPIE Press, 2004: 5782.

[2] N Yu, P Gnevet, A K Mikhail. Light propagation with phase discontinuities: Generalized laws of reflection and refraction. Science, 334, 333(2011).

[3] M Khorasaninejad, W T Chen, R C Devlin. Metalenses at visible wavelengths: diffraction limited focusing and subwavelength resolution imaging. Science, 352, 1190-1194(2016).

[4] M Khorasaninejad, Z Shi, A Y Zhu. Achromatic metalens over 60 nm bandwidth in the visible and metalens with reverse chromatic dispersion. Nano Lett, 17, 1819-1824(2017).

[5] W T Chen, A Y Zhu, V Sanjeev. A broadband achromatic metalens for focusing and imaging in the visible. Nat Nanotechnology, 13, 220-226(2018).

[6] S Wang, P Wu, V Su. A broadband achromatic metalens in the visible. Nat Nanotechnology, 13, 227-232(2018).

[7] P Wang, N Mohammad, R Menon. Chromatic-aberration-corrected diffractive lenses for ultra-broadband focusing. Scientific Reports, 6, 21545(2016).

[8] P Wang, N Mohammad, B Shen. Broadband imaging with one planar diffractive lens. Scientific Reports, 8, 2799(2018).

[9] M Meem, A Majumder, R Menon. Full-color video and still imaging using two flat lenses. Opt Express, 26, 26866-26871(2018).

[10] M Meem, B Soueangsu, A Majumder. Broadband lightweight flat lenses for long-wave infrared imaging. PNAS, 116, 21375-21378(2019).

[11] A Francisco, G Patrice, A Mikhail. Aberration--free ultrathin flat lenses and axicons at telecom wavelengths based on plasmonic metasurfaces. Nano Lett, 12, 4932-4936(2012).

[12] S Shrestha, A C Overvig, Ming Lu. Broadband achromatic dielectric metalenses. Light: Science & Applications, 7, 85(2018).

[13] R Pestourie, C Pérez-Arancibia, Z Lin. Inverse design of large-area metasurfaces. Opt Express, 26, 33732-33747(2018).

[14] H J Chung, M Owen. High-NA achromatic metalenses by inverse design. Opt Express, 29, 6945-6965(2020).

[15] Z Lin, S G Johnson. Overlapping domains for topology optimization of large-area metasurfaces. Opt Express, 27, 32445-32453(2019).

[16] C Chen, W Song, J W Chen. Spectral tomographic imaging with aplanatic metalens. Light: Science & Applications, 8, 99(2019).