Backflow in the relaxation of a hybrid aligned nematic cell

Jewell, S. A.; Sambles, J. R.
May 2003
Applied Physics Letters;5/12/2003, Vol. 82 Issue 19, p3156
Academic Journal
The optical convergent-beam technique has been used to measure the changing director profile in a 4.6 μm ZLI-2293 filled hybrid aligned nematic cell when a 7 V[SUBrms] ac voltage was removed. The relaxation process has been recorded in 0.3 ms time steps allowing the detailed director backflow occurring in the initial 9 ms of the reorientation process to be quantified. The measured tilt profiles over the 60 ms total relaxation period were compared to model tilt profiles produced using the Leslie--Eriksen--Parodi theory, and excellent agreement was found. Further analysis shows that the backflow is dominated by the viscosity coefficient &neta;[SUB1] and the overall relaxation is governed by the coefficient γ[SUB1].


Related Articles

  • Analysis of the resonance characteristics of a cantilever vibrated photothermally in a liquid. Inaba, Seiki; Akaishi, Kenya; Mori, Takahiro; Hane, Kazuhiro // Journal of Applied Physics;3/15/1993, Vol. 73 Issue 6, p2654 

    Presents a study that investigated the resonance characteristics of stainless-steel cantilevers vibrated photothermally in a liquid using an optical detection system. Schematic drawing of a typical cantilever made of stainless steel; Resonance curve of the vibration amplitude of the cantilevers...

  • Viscosity-mismatched fluid waveguide aimed at biomedical research.  // Laser Focus World;Jun2006, Vol. 42 Issue 6, p11 

    The article reports that researchers at the Colorado School of Mines have created all–fluid optical guides composed of two liquids with mismatched viscosity. The waveguides are potentially useful in dynamically switched microfluidic–based analytical systems for biomedical research....

  • Structural Rheology of the Smectic Phase. Shuji Fujii; Shigeyuki Komura; Chun-Yi David Lu // Materials (1996-1944);Jul2014, Vol. 7 Issue 7, p5146 

    In this review article, we discuss the rheological properties of the thermotropic smectic liquid crystal 8CB with focal conic domains (FCDs) from the viewpoint of structural rheology. It is known that the unbinding of the dislocation loops in the smectic phase drives the smectic-nematic...

  • Fabrication of biopolymer composites from oxidized chitosan and investigation of their properties. Chursin, V.; Kubyshkina, T.; Chirkova, N. // Fibre Chemistry;Sep2008, Vol. 40 Issue 5, p441 

    The optimum ratios of gelatin and oxidized chitosan in biopolymer composites were established by studying the viscosity and optical density of solutions of the biopolymers. The study of the sorption properties of films showed that oxidation of chitosan on one hand increases the degree of...

  • Evaluation of residual stress and viscosity in SiO2-core/F-SiO2 clad single-mode optical fibers from Brillouin gain spectra. Hibino, Yoshinori; Edahiro, Takao; Horiguchi, Tsuneo; Azuma, Yuji; Shibata, Nori // Journal of Applied Physics;11/1/1989, Vol. 66 Issue 9, p4049 

    Presents a method for evaluating residual stress and viscosity in SiO[sub2]-core/F-SiO[sub2] clad single-mode optical fibers from Brillouin gain spectra. Measurement of Brillouin gain spectra for optical fibers; Relationships between residual stress and drawing tension; Values of residual stress.

  • Stokes, George Gabriel (1819 - 1903).  // Hutchinson Dictionary of Scientific Biography;2005, p1 

    Irish physicist who is mainly remembered for Stokes's law, which relates the force moving a body through a fluid to the velocity and size of the body and the viscosity of the fluid. He also made important contributions in optics, particularly in the field of fluorescence, a term that he coined.

  • Response to: 'A different approach for manual foldable IOL injection for keeping wound size and integrity'. Khokhar, S; Sharma, R; Patil, B; Aron, N; Gogia, S G // Eye;Mar2015, Vol. 29 Issue 3, p447 

    A response from the author of the article " A different approach for manual foldable IOL injection for keeping wound size and integrity" in the 2015 issue is presented.

  • Viscosity sensor makes waves. DiChristina, M. // Popular Science;May89, Vol. 234 Issue 5, p37 

    Discusses a new sensor that has been developed at Sandia National Laboratories which can determine the viscosity of as little as one drop of liquid. Explains how it works.

  • Mudbanks of the southwest coast of India. II: Wave-mud interactions Mathew, Joseph; Baba, Mytheenkhan // Journal of Coastal Research;Winter1995, Vol. 11 Issue 1, p179 

    No abstract available.


Read the Article


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

Try another library?
Sign out of this library

Other Topics