An adjoint topology-optimized SiN structure is predicted by FDTD simulations to give about 107% helical dichroism between +3 and -3 OAM beams at 800 nm, the highest reported HD value in simulation.
Scientific reports, 2020
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Inverse Design of Chiral Structures for Giant Helical Dichroism
An adjoint topology-optimized SiN structure is predicted by FDTD simulations to give about 107% helical dichroism between +3 and -3 OAM beams at 800 nm, the highest reported HD value in simulation.