[PDF] Top 20 Smectic layer instabilities in liquid crystals

... ferroelectric liquid crystal, although phase shifted by 180 O for both domain types, the overall optic response of the horizontal chevron domain device tends to zero, independent of the position of the device ... See full document

... able. Hence we can establish the gross phase sequence in the binary system of 12BIMF10 and MHPBC as well as that of 共R兲- and 共S兲-MHPBC’s. At the same time, we notice that an unambiguous proof for the existence of ... See full document

... produces the C4 symmetry and therefore the helical pitch with two molecular distances. For a chiral additive or for a system made of enantiopure dimers the additional interactions will modify the short range pitch ... See full document

... Liquid crystals (LCs) are mesomorphic phases of matter which are exhibited by materials consisting of anisotropic rod- or disc-like ...isotropic liquid and crystalline solid phases, and display ... See full document

... the smectic LC that predicts the transition between this hierarchical assembly and topographic confinement of FCDs as the pillar height ...the layer configurations that allows us to numerically investigate ... See full document

... the smectic LC that predicts the transition between this hierarchical assembly and topographic confinement of FCDs as the pillar height ...the layer configurations that allows us to numerically investigate ... See full document

... the smectic lay- ers may be caused by the solitonlike wave ...each layer is almost canceled out by the opposite direction of the neighboring polarization, and a small residual polarization is almost ... See full document

... each layer is spontaneously ...the layer norm al, the tilt and the polarisation direction rotate from one layer to the next (see figure ...ferroelectric liquid crystals, the prim ary ... See full document

... the layer compression and layer bend terms in- troduced below are common to all smectics, regardless of the presence of in-plane orientational ...the layer normal, which we take to be along the z- ... See full document

... the layer spacing in the SmC phase using a molecular model which corresponds to a sugarloaf-shaped ODF ...constant layer spacing and the conventional layer contraction can be reproduced using the ... See full document

... Two different types of ∼7-μm-thick cells were used in optical measurements: the homogeneous cells with planar alignment for birefringence (n) measurements and ho- mogeneous cells with homeotropic alignment for biaxiality ... See full document

... in smectic-A liquid crystals: the conventional unimodal distribution and the “cone-shaped” de Vries ...the smectic-A liquid crystal is of the de Vries type, we calculate the ⌰ required ... See full document

... the layer shrinkage caused by the tilt of the rigid core is balanced by a simultaneous increase in the projection of the length of aliphatic chains along the layer ...designing smectic liquid ... See full document

... The experimental setup of the optical measurements made is shown in the upper part of Fig. 2. A cell of 1.6 µm thick with planar alignment of 12OF1M7 is used. Such a low cell thickness suppresses the subphases between ... See full document

... Two different types of ∼7-μm-thick cells were used in optical measurements: the homogeneous cells with planar alignment for birefringence (n) measurements and ho- mogeneous cells with homeotropic alignment for biaxiality ... See full document

... appearance of the tilt, and consequently, the order parameters in the laboratory reference system are often called “appar- ent.” 兲 Hence the nonpolarized IR beam is parallel to the smectic layer normal ... See full document

... the smectic mass- density wave. Whereas the layer normal in a smectic is parallel to the molecular alignment, the pitch axis is or- thogonal to the director in a ...of liquid crystalline ... See full document

... Illustrative examples of the above exact solutions can now be presented for the typical parameter values stated in Table 1 (cf. [12, 31, 34]). Not all of these selected parameters appear in the linearized equations; ... See full document

... the smectic layers, although deformed, remain of constant thickness, and also the angle of tilt of the alignment with respect to the layer normal remains ... See full document

... It also predicts that the extinction angle tends towards ± 45° for cell gaps close to the full wave plate condition (Δn.d = λ) at which point domains either side of the layer normal are optically equivalent. ... See full document