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1 Mar 2004

Volume 84, Issue 9, pp. 1435-1613

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Appl. Phys. Lett. 84, 1558 (2004); http://dx.doi.org/10.1063/1.1651641 (3 pages)

DongWeon Lee, Adrian Wetzel, Roland Bennewitz, Ernst Meyer, Michel Despont, Peter Vettiger, and Christoph Gerber
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Vertical alignment liquid crystal cell with optically compensated splay configuration of the liquid crystal

S. H. Lee, S. J. Kim, and J. C. Kim

Appl. Phys. Lett. 84, 1465 (2004); http://dx.doi.org/10.1063/1.1652230 (3 pages) | Cited 5 times

Online Publication Date: 25 February 2004

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We have observed a phenomenon associated with a transition from vertical alignment to an optically compensated splay structure. With rubbed homeotropic alignment in parallel directions, the device shows vertical alignment but the liquid crystals (LCs) are twisted 180° in the absence of an electric field. Depending on the voltage applied, two different configurations of LCs are possible. After applying a critical voltage, the LC configuration becomes splayed such that the middirector lies parallel to the substrate and around it, and a hybrid structure forms symmetrically. A method for obtaining the transition and the electro-optic characteristics of the device is discussed. © 2004 American Institute of Physics.
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42.79.Kr Display devices, liquid-crystal devices
78.20.Jq Electro-optical effects

Radio frequency potential of inductive plasma immersed in a weak magnetic field

V. A. Godyak and B. M. Alexandrovich

Appl. Phys. Lett. 84, 1468 (2004); http://dx.doi.org/10.1063/1.1655698 (3 pages) | Cited 7 times

Online Publication Date: 25 February 2004

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Radio frequency potential has been revealed in inductively coupled plasma (ICP) immersed in a weak magnetic field. The rf plasma potential measured in a wide range of driving frequency and argon pressure reached tens of volts at a relatively weak magnetic field and was found falling with an increase in the driving frequency and gas pressure. The appearance of rf plasma potential in magnetized ICP is interpreted as a result of rf Hall effect caused by the electron rf drift in a crossed magnetic field. © 2004 American Institute of Physics.
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52.50.Dg Plasma sources
52.70.Ds Electric and magnetic measurements
52.25.Fi Transport properties
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