Figure 10.

Other phase change metasurfaces. (a–e) VO₂-based metadevice: (a) SEM image of the VO₂-based metagrating device with two outcoupling gratings at both sides; (b) An illustration of the metadevice with a symmetric nanoantenna and the initiated SPPs at both sides; (c) Schematic configuration of the VO₂-based metadevice with a packed PCM between two Au metals and spacer layer of Al₂O₃; (d) Reflection spectra with different electrical currents to tune the spectral resonances. (e) Rewritable memory effect of the metadevice; (f–i) AIST-based metadevice: (f) A representation of an AIST-based color filter; (g) The generated colors using an AIST-integrated metafilter; (h) Resolution of created nanopixels on AIST using CAFM; (i) I–V curves of the AIST film obtained by CAFM. (a,b) are adapted from [79], with permission from © 2017 Nature Publishing Group; (c–e) are adapted from [80], with permission from © 2016 Nature Publishing Group; and (f–i) are adapted from [71], with permission from © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.