A polarization-insensitive metasurface using spatially varying cross-shaped dielectric resonators generates vortex beams at 8.8 μm and 0.78 THz, shown via FDTD design and experimental imaging.
Tonouchi, Cutting-edge terahertz technology, Nature Photonics 1 (2) (2007) 97
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Dielectric cross-shaped resonator based metasurface for vortex beam generation in Mid-IR and THz wavelengths
A polarization-insensitive metasurface using spatially varying cross-shaped dielectric resonators generates vortex beams at 8.8 μm and 0.78 THz, shown via FDTD design and experimental imaging.