Siloxane antiferroelectric liquid crystalline dimer exhibiting two field-free zero birefringent states.
Artikel i vetenskaplig tidskrift, 2004

We studied the optical and electro-optical properties of a siloxane antiferroelectric liquid crystalline dimer exhibiting a large molecular tilt that reached a maximum value of 53°. When the molecular tilt angle in the antiferroelectric phase exceeded 45°, it was found that the field-free position of the slow vibration direction, which corresponds to the largest refractive index, flipped from a position along the smectic layer normal, to a position perpendicular to it. When the tilt angle became 45°, a zero birefringent state, which was theoretically predicted by de Meyere in 1996, was also found to occur twice in the antiferroelectric phase of the siloxane dimer.

dimer

siloxane

liquid crystalline

polarization

tilt

antiferroelectric

Författare

Nils Olsson

Göteborgs universitet

Ingolf Dahl

Göteborgs universitet

Bertil Helgee

Chalmers, Institutionen för material- och ytkemi, Polymerteknologi

Göteborgs universitet

Lachezar Komitov

Göteborgs universitet

Liquid Crystals

0267-8292 (ISSN) 1366-5855 (eISSN)

Vol. 31 12 1555-1568

Ämneskategorier

Oorganisk kemi

Telekommunikation

Fysikalisk kemi

Övrig annan teknik

Atom- och molekylfysik och optik

Organisk kemi

Den kondenserade materiens fysik

DOI

10.1080/02678290412331323130