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 …

We introduce and demonstrate a compact, nonmechanical beam steering device based on
liquid Crystal (LC) Polarization Gratings (PGs). Directional control of collimated light is …

We experimentally demonstrate a reflective-mode liquid crystal polarization grating with high
reflectance, small grating period, and subms switching times. This switchable optical …

Measurements of complete polarization and spectral content across a broad wavelength
range of a scene are used in various fields including astronomy, remote sensing, and target …

Spatially continuous tunable optical notch and band-pass filter systems that cover the visible
(VIS) and near-infrared (NIR) spectral ranges from∼ 460 nm to∼ 1,000 nm are realized by …

We demonstrate a polarization-independent tunable optical filter based on switchable
polarization gratings (PGs) formed using reactive and nonreactive liquid crystals (LCs). PGs …

Polarization gratings (PGs) as polarization sensitive diffractive optical elements work in
broadband (UV to Mid-IR) with nearly 100% diffraction efficiency. We have introduced and …

We report continuously tunable and bandwidth variable optical notch and band-pass filters
created by combining four left-and right-handed circular cholesteric liquid crystal cells …

We introduce and demonstrate a switchable novel linear polarization grating (LPG)
consisting of a circular polarization grating (CPG) and a special cycloidal diffractive quarter …

Diffractive optics elements have exhibited many novel characteristics through various
methods of employing Pancharatnam-Berry, or geometric, phase. One geometric-phase …