Figure 18:

Spatial replication type SSI with metasurface [140], [141]. (a) MSSI schematic and operating principle. (b) Schematic diagram of the micro-nano structure of the metasurface. (c) Multi-channel imaging schematic. (d) Normalized image array of different spectral images. (e) The focusing efficiency of the metasurface at different wavelengths. (f) Diagram of the image captured by the detector. (a–d) Reproduced with permission [140]. Copyright 2020, American Association for the Advancement of Science. (e–f) Reproduced with permission [141]. Copyright 2023, Nature Publishing Group.