TITLE

Small angle relaxation of highly deformed nematic liquid crystals

AUTHOR(S)
Wu, Shin-Tson; Wu, Chiung-Sheng
PUB. DATE
November 1988
SOURCE
Applied Physics Letters;11/7/1988, Vol. 53 Issue 19, p1794
SOURCE TYPE
DOC. TYPE
Article
ABSTRACT
Transient phase response associated with a small angle relaxation from highly deformed nematic liquid crystal (LC) directors is analyzed experimentally and numerically. Qualitative agreement between computer simulations and experimental results is obtained. Based on these results, decay time of a fast LC modulator employing the transient nematic effect is derived. This decay time is found to be fast (with potential to achieve âˆ¼50 Î¼s), insensitive to LC thickness, but proportional to (Î»/Î”n0)2, Î» being the wavelength and Î”n0 the corresponding birefringence.
ACCESSION #
9828738

Related Articles

• Picosecond excite-and-probe absorption measurement of the intra-2EgE3/2-state vibrational relaxation time in Ti3+:Al2O3. Gayen, S. K.; Wang, W. B.; Petricˇevic, V.; Yoo, K. M.; Alfano, R. R. // Applied Physics Letters;5/25/1987, Vol. 50 Issue 21, p1494

The kinetics of vibrational transitions in the 2EgE3/2 electronic state of Ti3+:Al2O3 is studied by exciting higher lying vibrational levels of the state by a 527-nm picosecond pump pulse, and monitoring the subsequent growth of population in the zero vibrational level and lower lying...

• Optimizing the nematic liquid crystal relaxation speed by magnetic field. Bin Wang; Xinghua Wang; Bos, Philip J. // Journal of Applied Physics;8/15/2004, Vol. 96 Issue 4, p1785

Nematic liquid crystalline materials have been widely used in electro-optical control of visible light. However, when IR light is considered, the thickness of the liquid crystal layer must be increased which causes the relaxation time of the material to be slower than required for many...

• The influence of temperature fields on the orientational relaxation in hybrid liquid-crystal cells. Zakharov, A.; Vakulenko, A. // Physics of the Solid State;Mar2008, Vol. 50 Issue 3, p579

The relaxation of the director field $$\hat n$$ , the velocity field v, and the shear and normal components of the stress tensor in a hybrid liquid-crystal cell with differently heated bounding surfaces is investigated theoretically. The system of nonlinear hydrodynamic equations that describe...

• Relaxation of chemical reactions to stationary states in the chemical affinities space. Sonnino, Giorgio // Journal of Mathematical Physics;Dec2010, Vol. 51 Issue 12, p122703

Using the mass balance equations for chemical reactions, we show how the system relaxes toward a steady-state in and out of the Onsager region. In the chemical affinities space, after fast transients, the relaxation process is a straight line when operating in the Onsager region, while out of...

• Resonant Amplification And Relaxation Process Of Transient Current In Nano-contact Systems. Ishii, Hiroyuki; Tomita, Yoko; Nakayama, Takashi // AIP Conference Proceedings;2007, Vol. 893 Issue 1, p997

In order to investigate the transient-current behavior in nano-contact systems, we developed a new calculation method of time-dependent current based on the Liouville equation of density matrix. Using this method, we found the oscillation of transient current originating from quantum-phase...

• Energy relaxation of intermolecular motions in supercooled water and ice: A molecular dynamics study. Yagasaki, Takuma; Saito, Shinji // Journal of Chemical Physics;12/28/2011, Vol. 135 Issue 24, p244511

We investigate the energy relaxation of intermolecular motions in liquid water at temperatures ranging from 220 K to 300 K and in ice at 220 K using molecular dynamics simulations. We employ the recently developed frequency resolved transient kinetic energy analysis, which provides detailed...

• The dependence of singlet exciton relaxation on excitation density and temperature in polycrystalline tetracene thin films: Kinetic evidence for a dark intermediate state and implications for singlet fission. Burdett, Jonathan J.; Gosztola, David; Bardeen, Christopher J. // Journal of Chemical Physics;12/7/2011, Vol. 135 Issue 21, p214508

The excited state dynamics of polycrystalline tetracene films are studied using femtosecond transient absorption in combination with picosecond fluorescence, continuing work reported in an earlier paper [J. J. Burdett, A. M. Muller, D. Gosztola, and C. J. Bardeen, J. Chem. Phys. 133, 144506...

• 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...

• Clean design breeds pure crystals. Li, Zhixin; Koziol, Jurek // Machine Design;02/05/98, Vol. 70 Issue 2, p56

Features the crystal-growing systems used for converting raw polysilicon material into monocrystalline ingots from which wafers is sliced. Functions of the system; Examination of the motion-control strategies; Discussion on the challenge presented by vacuum sealing. INSETS: The challenge of...

Share