Drawing upon the principles of digital coding metasurfaces, we propose the double-split ring resonators coding metasurface that can switch between different frequency bands with varying amplitudes. Under transverse-magnetic (TM) polarized terahertz wave incidence, the same metasurface meta-atom structure utilizes amplitude coding to achieve spatial imaging functionality. Due to limitations in device size and fabrication techniques, actively controlled coding metasurfaces in the terahertz frequency range are rare. In order to enhance the flexibility of terahertz coding metasurfaces, a phase-change material, vanadium dioxide ( |
ACCESS THE FULL ARTICLE
No SPIE Account? Create one
Terahertz radiation
Dielectrics
Switching
Vanadium
Optical transmission
Metals
Transition metals