Fig. 1. Metasurface array imaging display schematic at different frequency

Fig. 2. Structural parameters of the basic unit of terahertz metasurface

Fig. 3. Absorption curves of 2-bit coding metasurface units at different frequency

Fig. 4. Schematic display of different letters at different frequency. (a) Letter"T"at 0.838 THz frequency; (b) letter"T"at 0.838 THz frequency; (c) letter"T"at 0.838 THz frequency; (d) letter"T"at 0.838 THz frequency; (e) metasurface array

Fig. 5. Array structure with integrated metasurface units. (a) 10, 00 coding unit constructs T-letter; (b) 11, 01 coding unit constructs Y-letter; (c) 00, 10 coding unit constructs U-letter; (d) 01, 11 coding unit constructs T-letter

Fig. 6. Imaging effect of metasurface array structure at different frequency