Direct evidence of the molecular switching in electrically commanded surfaces for liquid crystal displays
Artikel i vetenskaplig tidskrift, 2005

This work, performed by means of time-resolved high-resolution birefringence measurements, establishes the switching mechanism of electrically commanded surfaces _ECS_ for liquid-crystal displays. A distinct polar electro-optic response, due to the field-induced in-plane switching of the molecules of the 200-nm ferroelectric liquid crystalline polysiloxane alignment layer representing ECS, was detected in a cell filled with isotropic liquid _hexadecane_. The similarity between this response and the one reported recently in cells containing the same ECS but with a nematic liquid-crystal bulk with negative dielectric anisotropy (Delta-epsilon < 0) and field-free planar alignment provides direct and unambiguous proof that the switching in these cells is indeed mediated by the ECS. © 2005 American Institute of Physics. _DOI: 10.1063/1.2009071_

polymer films

birefringence

time resolved spectra

ferroelectric switching

liquid crystal polymers

molecular reorientation

ferroelectric liquid crystals

electro-optical effects

nematic liquid crystals

permittivity

molecular orientation

Författare

Miha Škarabot

Igor Muševič

Bertil Helgee

Chalmers, Kemi- och bioteknik, Polymerteknologi

Göteborgs universitet

Lachezar Komitov

Göteborgs universitet

Journal of Applied Physics

0021-8979 (ISSN) 1089-7550 (eISSN)

Vol. 98 046109-

Ämneskategorier

Bearbetnings-, yt- och fogningsteknik

Övrig annan teknik

Atom- och molekylfysik och optik

Annan materialteknik

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