In their work, the MPL scientists moved beyond the control and manipulation of light with linear and circular polarization and reported a new hollow-core waveguide which exhibits a strong helical ...

The hollow waveguide can also be designed for spectral ... More information: Christof Helfrich et al, Giant Helical Dichroism in Twisted Hollow-Core Photonic Crystal Fibers, ACS Photonics (2025).