# Wydział Fizyki Technicznej, Informatyki i Matematyki Stosowanej / Faculty of Technical Physics, Information Technology and Applied Mathematics / W7

Stały URI zbioruhttp://hdl.handle.net/11652/7

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## Wyniki wyszukiwania

Pozycja Magia słów(Wydawnictwo Politechniki Łódzkiej, 2019) Buczkowska, MariolaTomik „Magia słów” to zbiór wierszy dotyczących duchowości, miłości, relacji ludzkich, jak również poświęcony przyrodzie. Poetka jest miłośniczką wypraw górskich, w szczególności w Tatry i im także zadedykowała kilka utworów. Mariola Buczkowska opublikowała również swoje wiersze w antologiach poetów współczesnych Wydawnictwa ASTRUM.Pozycja Flexoelectro-optic effect with large rotation angle of optic axis(Wydawnictwo Politechniki Łódzkiej, 2020) Buczkowska, MariolaThe flexoelectro-optic effect in layers of chiral nematics was investigated numerically. The simulations concerned short pitch materials with the helix axis parallel to the layer plane. Configurations which allow to avoid accumulation of ions at the electrodes and are suitable for square-wave driving voltage were considered. They were related to large rotation angles of the optical axis of the layer about the normal to the layer. Influence of chosen parameters on efficiency of the electro-optic effect was studied.Pozycja Influence of chirality on two-dimensional deformations of twisted flexoelectric nematic layers(Lodz University of Technology Press, 2019) Buczkowska, MariolaTwo-dimensional deformations induced by electric field in twisted nematic cells filled with liquid crystal possessing flexoelectric properties were simulated numerically. The influence of chiral dopants on the occurrence and structure of the spatially periodic patterns was investigated. It was found that the chirality influences mainly the direction of the periodic patterns whereas the threshold voltage for deformation and the width of the stripes are weakly affected.Pozycja Flexoelectric torque in uniformly lying helix structures of chiral nematic liquid crystal(Wydawnictwo Politechniki Łódzkiej, 2018) Buczkowska, MariolaElectric field induced deformations of chiral nematic liquid crystal layers were studied numerically. Uniformly lying helix structure of short pitch flexoelectric mixtures was considered. The electro-optic effect due to rotation of optical axis around the normal to the layer was simulated. The flexoelectric torque arising under the action of bias voltage and responsible for this rotation was calculated. It was found that the prevailing torque occurs in close vicinity of the boundary plates. Nonlinearity of superposition of splay and bend contributions to the total flexoelectric torque was found.Pozycja Płyń poezjo słów potokiem...(Politechnika Łódzka, 2017) Buczkowska, MariolaDebiutancki tomik wierszy zatytułowany „Płyń poezjo słów potokiem...” poświęcony jest uczuciom, postrzeganiu świata oraz umiłowaniu piękna przyrody.Pozycja Influence of tilted surface alignment on flexoelectric domains in twisted nematic layers(Wydawnictwo Politechniki Łódzkiej, 2017) Buczkowska, Mariola; Derfel, GrzegorzThe small deformations induced by electric field in twisted flexoelectric nematic layers were simulated numerically. The onedimensional (i.e. homogeneous over the whole area of the layer) and two-dimensional (i.e. spatially periodic flexoelectric domains) deformations were considered. It was shown that the periodic deformations do not arise if sufficiently high pretilt angle is imposed by the boundary conditions. The value of pretilt angle necessary for elimination of domains increases with the flexoelectric coefficient e33. This result is of practical meaning because the flexoelectric domains are undesirable from an applicative point of view since they destroy the homogeneous appearance of the area of an excited pixel of a display.Pozycja Two-dimensional deformations in twisted flexoelectric nematic cells.(Wydawnictwo Politechniki Łódzkiej, 2016) Derfel, Grzegorz; Buczkowska, MariolaElectric field induced deformations occurring in twisted nematic cells filled with liquid crystalline material possessing flexoelectric properties were simulated numerically. The aim of computations was to compare the two-dimensional periodic deformations with one-dimensional distortions reported in our earlier paper occurring in the same cells. It was found that the periodically deformed structures have lower free energy counted per unit area of the layer than the one-dimensional deformations.Pozycja Macroscopic model formulae describing anisotropic anchoring of nematic liquid crystals on solid substrates.(Wydawnictwo Politechniki Łódzkiej, 2015) Derfel, Grzegorz; Buczkowska, MariolaFormulae used for description of anchoring energy of nematic liquid crystal aligned on solid substrates are reviewed. They are based on macroscopic approach considering the concepts of the easy axis and of the anchoring strength parameters. Properties of the modified formula proposed in our earlier article are illustrated by exemplary plots which allows for comparison with other formulae. The modified formula describes the dependence of energy on the azimuthal and polar deviation of director from the easy axis and is valid qualitatively for deviation of any magnitude.Pozycja Temporal characteristics of DC electric field induced deformations of flexoelectric nematic layers(Wydawnictwo Politechniki Łódzkiej, 2012) Derfel, Grzegorz; Buczkowska, MariolaDynamics of DC electric field induced deformations of flexoelectric nematic layers were studied numerically. The characteristic response times were calculated. It was found that the cooperative effect of flexoelectricity and of ionic space charge may affect the dynamics of the deformations even in the case of rigid anchoring.Pozycja Direct current electric field induced deformations of dielectrically isotropic flexoelectronic nematic layers(Wydawnictwo Politechniki Łódzkiej, 2011) Derfel, Grzegorz; Buczkowska, Mariola; Pietrzyk, BartłomiejDeformations of nematic layers induced by d.c. electric field were studied numerically. The nematic liquid crystal under consideration possessed flexoelectric properties. Its dielectric anisotropy was zero, so the deformations were solely of flexoeleclric nature. The threshold voltages for deformations were calculated for nematics with very low, moderate and high ion content. In the case of weak flexoelectric properties, the predicted threshold voltage reached c. 100V in pure material. It decreased strongly with increasing ion content and reached values much lower than the theoretical values calculated for the perfectly insulating material. The director distributions in deformed stales were also determined. Four kinds of director profiles were distinguished.