Liquid crystal (LC) circular polarization gratings (PGs), also known as Pancharatnam–Berry
(PB) phase deflectors, are diffractive waveplates with linearly changed optical anisotropy …

Liquid crystal (LC) planar optical elements (POEs) based on photoalignment technology
have emerged as a promising approach to manipulating light in various ways. Owing to the …

Recently, diverse twisting structures have been discovered to be a potential approach to
design liquid crystal polarization gratings and lenses (LCPGs and LCPLs) with a high …

In the past two decades, polarization gratings (PGs) have attracted intensive attention due to
the high-efficient diffraction and polarization selectivity properties. On one hand, the one …

Liquid crystal polarization gratings manifest several unique features, such as high diffraction
efficiency, polarization selectivity, and fast switching time. However, few works address the …

Liquid crystal (LC) based geometric phase optical elements are widely used to effectively
change the wavefront or propagation direction of light. Using photoalignment, the liquid …

Polarization volume gratings are self-organized liquid crystal helical structures. They exhibit
high diffraction efficiency and unique polarization selectivity. In this work, we investigate and …

The polarization independence of liquid crystal gratings with alternate orthogonal aligned
regions is theoritically studied and demonstrated by means of photoalignment technique …

We propose a liquid crystal (LC) polarization grating that conserves the polarization state of
incident light, wherein the variation range of the twist angle is 2π. The design scheme for …

We demonstrate a polarization-invariant liquid-crystal (LC) grating in an oppositely twisted
and mutually orthogonal configuration. The polarization-invariant LC grating with high …