Circularly-polarized, large-angle reflective deflectors based on periodically patterned cholesteric liquid crystals

Abstract Patterned cholesteric liquid crystals enable the fabrication of circular-polarization sensitive, reflective diffractive optical elements based on Bragg reflection. Here we report the fabrication of large-angle reflective deflector, which show deflection angles as large as 48.9°. The devices are fabricated by polarization holography, whereby two orthogonal circular polarized beams are superimposed on a photoalignment layer to create a linear modulation of the orientational easy axis. The devices show high circular-polarization extinction ratios, making them potentially useful as functional reflectors and polarization splitters.

[1]  Guoxing Zheng,et al.  Metasurface holograms reaching 80% efficiency. , 2015, Nature nanotechnology.

[2]  S. Bozhevolnyi,et al.  Plasmonic metasurfaces for efficient phase control in reflection. , 2013, Optics express.

[3]  R. Pelcovits,et al.  Stable polarization gratings recorded in azo-dye-doped liquid crystals , 2006 .

[4]  T. Todorov,et al.  Polarization holography. 2: Polarization holographic gratings in photoanisotropic materials with and without intrinsic birefringence. , 1984, Applied optics.

[5]  M. Ozaki,et al.  Broadband optical vortex generation from patterned cholesteric liquid crystals , 2017 .

[6]  Houtong Chen,et al.  A review of metasurfaces: physics and applications , 2016, Reports on progress in physics. Physical Society.

[7]  N. Yu,et al.  Flat optics with designer metasurfaces. , 2014, Nature materials.

[8]  S. Serak,et al.  Recording polarization gratings with a standing spiral wave , 2013 .

[9]  Hiroyuki Yoshida,et al.  Planar optics with patterned chiral liquid crystals , 2016, Nature Photonics.

[10]  Gregory P. Crawford,et al.  Liquid-crystal diffraction gratings using polarization holography alignment techniques , 2005 .

[11]  M. Ozaki,et al.  Polychromatic Optical Vortex Generation from Patterned Cholesteric Liquid Crystals. , 2016, Physical review letters.

[12]  Z. Jacob,et al.  All-dielectric metamaterials. , 2016, Nature nanotechnology.

[13]  T. Galstian,et al.  Optical polarization grating induced liquid crystal micro-structure using azo-dye command layer. , 2006, Optics express.

[14]  H. Yoshida,et al.  Flat optics with cholesteric and blue phase liquid crystals , 2016 .

[15]  Michael G. Debije,et al.  Electrically switchable polymer stabilised broadband infrared reflectors and their potential as smart windows for energy saving in buildings , 2015, Scientific Reports.

[16]  Xiaohua Li,et al.  Polarization volume grating with high efficiency and large diffraction angle. , 2016, Optics express.

[17]  M. Ozaki,et al.  Morpho‐Butterfly‐Inspired Patterning of Helical Photonic Structures for Circular‐Polarization‐Sensitive, Wide‐Angle Diffuse Reflection , 2017 .