F110fc 633

As shown in Fig. 2A, the laser (MRL-III-633L-80mW) is bought from Changchun New Industries Optoelectronics Technology Co. Ltd. The collimator is Thorlabs F110FC-633. The output beam waist diameter is 1.16 mm, which is larger than the metasurface size of 900 μm, so the incident light intensity on the metasurface is spatially uniform. The piezo electric stage is Physik Instrumente P-545.3C8S with a resolution of 1 nm. The lens is Thorlabs AC254-050-A-ML. The optical power meter used is Thorlabs S120VC with PM400. We tested the stability of the experimental system as shown in fig. S4. The laser power without the metasurface modulation is stable enough during one measurement period (1 s) with the relative error of 0.01%.

As shown in Fig. 2A, the laser (MRL-III-633 L-80 mW) is bought from Changchun New Industries Optoelectronics Technology Co. Ltd. The collimator is Thorlabs F110FC-633. The output beam waist diameter is 1.16 mm, which is larger than the metasurface size of 900 μm, so the incident light intensity on the metasurface is spatially uniform. The two acousto-optic modulators are AA Opto-Electronic MT80-B30A1-VIS with the minimal rise/fall time of 80 ns, which can switch incident polarization quickly. The piezo electric stage is Physik Instrumente P-545.3C8S with a resolution of 1 nm. The lens is Thorlabs AC254-050-A-ML. The optical power meters used are Thorlabs S120VC with PM400.