Fig. 2: Unit cell structures and phase design of MS I and MS II, with a schematic diagram illustrating the beam array scanning mode and flash illuminating mode.
From: A dual-mode LiDAR system enabled by mechanically tunable hybrid cascaded metasurfaces
a, b Schematic diagrams of the unit cell of MS I and MS II, respectively. c Amplitude and phase of the transmission coefficient of the unit cell of MS II under normal incidence as a function of diameter D. d, e Phase design of MS I and MS II, respectively. f Schematic diagram of beam scanning via lateral translation of MS II in beam array scanning mode. g Schematic diagram of achieving beam uniformity using an array design in flash illuminating mode
