PbS sculptured thin film and their effect on liquid crystals alignment

Lead Sulphide (PbS) sculptured thin film (STF) is prepared using glancing angle deposition (GLAD) technique by physical vapour deposition (PVD) process. The morphology of the GLAD films clearly shows that anisotropic structure is obtained and composed of micro-sheets having sharp top edges. Due to the orientational order of the GLAD PbS STF an attempt has been made to check its effect on the alignment of liquid crystals as one might expect strong effect to occur. The optical microscope images under crossed polarizer reveals that good alignment is observed. The transmission, birefringence and response time measurements have also been investigated.

[1]  I. Abdulhalim,et al.  Birefringence measurement using rotating analyzer approach and quadrature cross points. , 2014, Applied optics.

[2]  S. Jeng,et al.  Liquid crystal alignment on zinc oxide nanowire arrays for LCDs applications. , 2013, Optics express.

[3]  Ibrahim Abdulhalim,et al.  On alignment of nematic liquid crystals infiltrating chiral sculptured thin films , 2013 .

[4]  N. Kamanina.  Features of Liquid Crystal Display Materials and Processes , 2011 .

[5]  Stephen E. Swiontek,et al.  Wideband-rejection filters and reflection-hole filters of chalcogenide glass for circularly polarized IR-A and IR-B radiation , 2011 .

[6]  A. Lakhtakia,et al.  Thin-Film Metamaterials called Sculptured Thin Films , 2010, 1004.0520.

[7]  C. Kuo,et al.  Flexible Homeotropic Liquid Crystal Displays Using Low-Glass-Transition-Temperature Poly(ethylene terephthalate) Substrates , 2010 .

[8]  A. Aldea,et al.  Trends in Nanophysics , 2010 .

[9]  C. Kuo,et al.  Nanoparticles-doped guest-host liquid crystal displays. , 2008, Optics letters.

[10]  Hoi Sing Kwok,et al.  Photoalignment of Liquid Crystalline Materials: Physics and Applications , 2008 .

[11]  Hoi Sing Kwok,et al.  Photoalignment of Liquid Crystalline Materials , 2008 .

[12]  Ingo Dierking,et al.  Alignment Technologies and Applications of Liquid Crystal Devices. Liquid Crystals Book Series, Volume 5. By Kohki Takatoh, Masanori Sakamoto, Ray Hasegawa, Mitsushiro Koden, Nobuyuki Itoh and Masaki Hasegawa. , 2006 .

[13]  Masaki Hasegawa,et al.  Alignment Technology and Applications of Liquid Crystal Devices , 2005 .

[14]  T. Maeda,et al.  Tilted Liquid Crystal Alignment on Asymmetrically Grooved Porous Alumina Film , 2005 .

[15]  Dilip K. Paul,et al.  Sculptured Thin Films: Nanoengineered Morphology and Optics , 2005 .

[16]  L. Chien,et al.  Electro-Optical Characteristics and Morphology of a Bend Nematic Liquid Crystal Device Having Templated Polymer Fibrils , 2004 .

[17]  T. Maeda,et al.  Vertically Aligned Nematic Liquid Crystal on Anodic Porous Alumina , 2004 .

[18]  Yohei Nakanishi,et al.  40.1: A New MVA‐LCD by Polymer Sustained Alignment Technology , 2004 .

[19]  Dirk J. Broer,et al.  Alignment and switching of nematic liquid crystals embedded in porous chiral thin films , 2000 .

[20]  M. J. Brett,et al.  Chiral nematic order in liquid crystals imposed by an engineered inorganic nanostructure , 1999, Nature.

[21]  Kevin Robbie,et al.  FIRST THIN FILM REALIZATION OF A HELICOIDAL BIANISOTROPIC MEDIUM , 1995 .

[22]  Akhlesh Lakhtakia,et al.  On light propagation in helicoidal bianisotropic mediums , 1995, Proceedings of the Royal Society of London. Series A: Mathematical and Physical Sciences.

[23]  R. M. A. Azzam,et al.  Chiral thin solid films: Method of deposition and applications , 1992 .

[24]  NIELS O. YOUNG,et al.  Optically Active Fluorite Films , 1959, Nature.