Photopolarimeter based on planar grating diffraction

Division-of-amplitude photopolarimeter based on conical diffraction from a metallic grating.

Diffraction-grating-based Bloch Surface Wave Refractive Index Sensors

A planar optical sensor consisting of a diffraction grating and a onedimensional photonic crystal based on Bloch surface wave excitation effect is proposed. The obtained results can find application in the design of novel onchip refractive index sensors.

Spectral polarization measurements by use of the grating division-of-amplitude photopolarimeter.

The grating division-of-amplitude photopolarimeter (G-DOAP) is an instrument that exploits the multiple-beam-splitting, polarizing, and dispersive properties of diffraction gratings for the time-resolved measurement of the complete state of polarization of collimated broadband incident light, as represented by the four Stokes parameters as a function of wavelength across the spectrum. It is a c...

Polarization volume grating with high efficiency and large diffraction angle.

We propose a polarization volume grating (PVG), which exhibits nearly 100% diffraction efficiency and large diffraction angle. Both reflective and transmissive PVGs can be configured depending on application preference. Such a PVG is polarization-sensitive so that it can split an incident unpolarized beam into two well-separated yet polarized beams. These outstanding features make PVG a strong ...

Optically tunable and rewritable diffraction grating with photoaligned liquid crystals.

An optically tunable and rewritable liquid crystal (LC) diffraction grating cell has been revealed that consists of an optically active and an optically passive alignment layer. The grating profile is created by confining the LC director distribution in alternate planar and twisted alignment domains by means of photoalignment of the LCs. The proposed grating is optically tunable for diffractive...