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
Den kondenserade materiens fysik