4 papers · 1 filter
On-demand longitudinal transformations of light beams via an amplitude-phase-decoupled Pancharatnam-Berry phase element
Yu Zou, Yanke Li, Jialong Yan +7
Overcoming the inherent phase-only modulation limitation of conventional Pancharatnam-Berry (PB) elements, we propose a checkerboard-encoded PB element that enables simultaneous am…
Hybrid vector beams with non-uniform orbital angular momentum density induced by designed azimuthal polarization gradient
Lei Han, Shuxia Qi, Sheng Liu +3
Based on angular amplitude modulation of orthogonal base vectors in common-path interference method, we propose an interesting type of hybrid vector beams with unprecedented azimut…
Optically active beams: non-reciprocal optical activity in free space induced by spin-orbital interaction of light
Sheng Liu, Shuxia Qi, Peng Li +9
Optical activity, the power of a medium to rotate the polarization of a light beam, has contributed significantly to molecular structure assessments in stereochemistry, biomolecula…
Valley vortex states and degeneracy lifting via photonic higher-band excitation
Daohong Song, Daniel Leykam, Jing Su +7
We demonstrate valley-dependent vortex generation in a photonic graphene. Without breaking the inversion symmetry, excitation of two equivalent valleys leads to formation of an opt…