Metasurfaces are the planarized bulky metamaterials with artificially designed meta-atoms that are elegantly arranged to allow the powerful control over the wave's properties. The exotic physics such as generalized Snell's laws [1] and promising applications spanning from the lensing, holograms, color printing, bio-imaging to quantum photon source can be found in metasurface. In this researches, we are aiming and have achieved to design the multifunctional metasurfaces for information technology such as

• nanoscale point cloud generators (for face and pattern recognition) for potential big data collection [2];

• nanoscale cryptographic printing (such as encrypted QR codes) [3];

• kaleidoscopic metaphotonic multiplexers for multiple degree of freedom including spin, orbit angular momentum, spatial radiation channels [4,5,6];

• Janus meta-hologram (two-face dual holographic images) [7];

• photonic spin-Hall metalens [8].

[1]. Science 334, 333–337 (2011)

[2]. Light: Science & Applications 7, 63 (2018)

[3]. Advanced Optical Materials 7 (4), 1801070 (2019)

[4]. Light: Science & Applications 8, 1 (2019)

[5]. Advanced Optical Materials 7 (4), 1801479 (2019)

[6]. Advanced Materials Technologies, 1900710 (2019)

[7]. Advanced Materials, 1906352 (2019)

[8]. ACS Nano, 12, 82-88 (2018)