Fig. 2

Mechanical tuning devices. a Single-material kirigami structure sheet under biaxial tension. Reproduced with permission from [105], copyright John Wiley and Sons, 2022. b Miura-ori chiral metamaterials with split-ring resonators. Reproduced with permission from [106], copyright John Wiley and Sons, 2017. c Reconfigurable SRR structure based on kirigami and its cantilevers structure. Reproduced with permission from [107], copyright Springer Nature, 2018. d Metasurface on stretched polydimethylsiloxane (PDMS) substrate. Reproduced with permission from [6], copyright American Chemical Society, 2016. e Illustrations of the stretchable device while applying a biaxial stretching force. Reproduced with permission from [108], copyright John Wiley and Sons, 2019. f Diagram of a bilayer metasurface covered with Al-PI. Reproduced with permission from [100], copyright John Wiley and Sons, 2020