1 research outputs found
Inverse Designed WS2 Planar Chiral Metasurface with Geometric Phase
Increasing attention is being paid to chiral metasurfaces due to their
ability to selectively manipulate right-hand circularly polarized light or
left-hand circularly polarized light. The thin nature of metasurfaces, however,
poses a challenge in creating a device with effective phase modulation.
Plasmonic chiral metasurfaces have attempted to address this issue by
increasing light-matter interaction, but they suffer from metallic loss.
Dielectric metasurfaces made from high index materials enable phase modulation
while being thin. Very few materials, however, have high refractive index and
low loss at visible wavelengths. Recently, some 2D materials have been shown to
exhibit high refractive index and low loss in the visible wavelengths,
positioning them as promising platform for meta-optics. This study introduces
and details a planar chiral metasurface with geometric phase composed of WS2
meta-units. By employing adjoint optimization techniques, we achieved broadband
circular dichroism.Comment: 9 pages, 5 figure