An all-optically prepared and controlled nematic liquid crystal light valve

Yi, Y. W.; Furtak, T. E.
November 2004
Applied Physics Letters;11/8/2004, Vol. 85 Issue 19, p4287
Academic Journal
We describe an optically prepared and controlled nematic liquid crystal device, using derivatized methyl red self-assembled monolayers for surface alignment on both of its windows. This material demonstrates both reversible and irreversible photoinduced anisotropy, depending on the availability of oxygen during illumination. One window of the cell was permanently aligned prior to assembly while the other window retained its sensitivity to the orientation of the polarization of a controlling optical beam, leading to either a uniform or twisted state in the nematic cell. The entire management of the cell was thereby achieved without touching the alignment surfaces.


Related Articles

  • Reflective homeotropic mode in a twisted nematic liquid crystal. Suh, Seong-Woo; Patel, J. S.; Lee, Sin-Doo // Applied Physics Letters;8/24/1998, Vol. 73 Issue 8 

    This letter reports on a novel liquid crystal (LC) display device capable of achromatic reflection in a twisted homeotropic configuration using a chiral nematic LC with negative dielectric anisotropy. Using the elastic continuum formalism, we arrived at simulated values for each parameter of...

  • Normal-mode anisotropic liquid-crystal gels. Fan, Yun-Hsing; Ren, Hongwen; Wu, Shin-Tson // Applied Physics Letters;5/5/2003, Vol. 82 Issue 18, p2945 

    A normal-mode anisotropic liquid-crystal (LC) gel is demonstrated. In the absence of an electric field, the light polarized along the rubbing direction is scattered. In the voltage-on state, the gel is highly transparent and is independent of polarization. Such a normal mode LC gel exhibits a...

  • Low threshold and high contrast polymer dispersed liquid crystal grating based on twisted nematic polarization modulator. Zheng, Z.; Guo, F.; Liu, Y.; Xuan, L. // Applied Physics B: Lasers & Optics;Apr2008, Vol. 91 Issue 1, p17 

    An electrically tunable mode is proposed to overcome the bottleneck problem of a conventional polymer dispersed liquid crystal (PDLC) grating and realize its low threshold and high contrast through an alignment-controlled PDLC. The results indicate that the threshold voltage VPP of the grating...

  • Reflection anisotropy spectroscopy: A probe of rubbed polyimide liquid crystal alignment layers. Macdonald, B. F.; Zheng, W.; Cole, R. J. // Journal of Applied Physics;4/15/2003, Vol. 93 Issue 8, p4442 

    The prospect of using reflectance anisotropy spectroscopy (RAS) for process control in the fabrication of liquid crystal devices is investigated. Measurements of the optical anisotropy induced by mechanically rubbing polymer thin films are presented and interpreted in terms of molecular...

  • Free alignment defect, low driving voltage of half-V ferroelectric liquid crystal device. Huang-Ming P. Chen; Chi-Wen Lin // Applied Physics Letters;8/24/2009, Vol. 95 Issue 8, p083501 

    The horizontal chevron alignment defect in half-V mode ferroelectric liquid crystal (FLC) cell can be reduced by asymmetrical alignment hybrid cell. The low free energy level generated from the interaction between spontaneous polarization and opposite polar alignment surfaces was found. As a...

  • Relation between the molecular orientation of a liquid crystal monolayer and the underlying polyimide film exposed to linearly polarized ultraviolet light. Usami, Kiyoaki; Sakamoto, Kenji; Ushioda, Sukekatsu // Journal of Applied Physics;6/15/2003, Vol. 93 Issue 12, p9523 

    We have determined the relation between the in-plane anisotropy of the molecular orientation of a liquid crystal (LC) monolayer and the underlying polyimide film exposed to linearly polarized ultraviolet light (LPUVL). To evaluate the anisotropy of the LC monolayer and the polyimide film, the...

  • Interaction of light with a dye-doped nematic liquid crystal. Barnik, M. I.; Zolot’ko, A. S.; Kitaeva, V. F. // Journal of Experimental & Theoretical Physics;Jun97, Vol. 84 Issue 6, p1122 

    The interaction of linearly and circularly polarized beams with a nematic liquid crystal doped with light-absorbing dyes has been studied by light-diffraction and microprojection methods. It has been found that there is a threshold for the emergence of light-induced anisotropic structures,...

  • Electrically switchable random to photonic band-edge laser emission in chiral nematic liquid crystals. Morris, Stephen M.; Gardiner, Damian J.; Hands, Philip J. W.; Qasim, Malik M.; Wilkinson, Timothy D.; White, Ian H.; Coles, Harry J. // Applied Physics Letters;2/13/2012, Vol. 100 Issue 7, p071110 

    Using a chiral nematic liquid crystal with a negative dielectric anisotropy, it is possible to switch between band-edge laser emission and random laser emission with an electric field. At low frequencies (<1 kHz), random laser emission is observed as a result of scattering due to...

  • The Design, Fabrication and Characterization of Nematic Liquid Crystals Based Chemical and Biological Sensors with Electroplated Microstructures. Namkung, Jun; Lindquist, Robert G. // Sensors & Transducers (1726-5479);Apr2010, Vol. 115 Issue 4, p116 

    This paper reports the design of an electroplated microstructure comprising an interdigitated capacitance (IDC) structure for the detection of vapor-phase analytes based on nematic liquid crystal (NLC) sensors. The approach reported in this paper is the orientational transition of NLCs supported...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics