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Št. zadetkov: 8
Vpliv magnetnega polja na dinamiko fluktuacij v feromagnetnih nematskih tekočih kristalih
Simon Mattiazzi, Mojca Vilfan, Nerea Sebastián Ugarteche
Magistrsko delo
Oznake: fizika kondenzirane snovi;nematski tekoči kristali;feromagnetizem;Fréederickszov prehod;fluktuacije;križna diferenčna dinamična mikroskopija;
V magistrskem delu obravnavamo feromagnetne nematike. Gre za relativno nov material, ki ga pripravimo kot suspenzijo feromagnetnih nanoploščic v nematskem tekočem kristalu. Pokažemo, da se osnovni statični parametri (elastični konstanti K1 in K3, dvolomnost $\Delta n $ ter anizotropija dielektričnos ...
Leto: 2024 Vir: Fakulteta za matematiko in fiziko (UL FMF)
Viscous mechano-electric response of ferroelectric nematic liquid
Peter Medle Rupnik, Luka Cmok, Nerea Sebastián Ugarteche, Alenka Mertelj
Izvirni znanstveni članek
Oznake: mehanoelektrika;polarizacija;
Direct viscous mechano-electric response is demonstrated for a room-temperature ferroelectric nematic liquid, which combines large spontaneous electric polarization with 3D fluidity. The mechano-electric transduction is observed in the frequency range 1 −200 Hz via a simple demonstrator device. The ...
Leto: 2024 Vir: Fakulteta za matematiko in fiziko (UL FMF)
Electrooptics of mm-scale polar domains in the ferroelectric nematic phase
Nerea Sebastián Ugarteche, Richard J. Mandle, Andrej Petelin, Alexey Eremin, Alenka Mertelj
Izvirni znanstveni članek
Oznake: polar nematic;ferroelectric splay nematic;surface effects;electro-optic behaviour;second harmonic generation;
The recent discovery of the ferroelectric nematic phase has opened the door to experimental investigation of one of the most searched liquid crystal phases in decades, with high expectations for future applications. However, at this moment, there are more questions than answers. In this work, we exa ...
Leto: 2021 Vir: Fakulteta za matematiko in fiziko (UL FMF)
Distinctive features of pretransitional behaviour between nematic phases as revealed by DDM
Nerea Sebastián Ugarteche, Luka Cmok, Andrej Petelin, Richard J. Mandle, Alenka Mertelj
Izvirni znanstveni članek
Oznake: kompleksne snovi;fazni prehodi;toplotni tokovi;
Pretransitional behaviour, with strong softening of the bend or splay elastic constants, is characteristic of two of the nematic to nematic phase transitions reported in the last decade. Such softening is strongly reflected in the pretransitional behaviour of the thermally excited director fluctuati ...
Leto: 2024 Vir: Fakulteta za matematiko in fiziko (UL FMF)
Tunable entangled photon-pair generation in a liquid crystal
Vitaliy Sultanov, Aljaž Kavčič, Emmanouil Kokkinakis, Nerea Sebastián Ugarteche, Maria V. Chekhova, Matjaž Humar
Izvirni znanstveni članek
Oznake: tekoči kristali;nelinearna optika;kvantna informacija;kvantna optika;liquid crystals;nonlinear optics;quantum information;quantum oprics;
Liquid crystals, with their ability to self-assemble, strong response to an electric field and integrability into complex systems, are key materials in light-beam manipulation. The recently discovered ferroelectric nematic liquid crystals also have considerable second-order optical nonlinearity, mak ...
Leto: 2024 Vir: Fakulteta za matematiko in fiziko (UL FMF)
Polarization patterning in ferroelectric nematic liquids via flexoelectric coupling
Nerea Sebastián Ugarteche, Matija Lovšin, Natan Osterman, Andrej Petelin, Irena Drevenšek Olenik, Alenka Mertelj
Izvirni znanstveni članek
Oznake: liquid crystals;nonlinear optics;
The recently discovered ferroelectric nematic liquids incorporate to the functional combination of fluidity, processability and anisotropic optical properties of nematic liquids, an astonishing range of physical properties derived from the phase polarity. Among them, the remarkably large values of s ...
Leto: 2023 Vir: Fakulteta za matematiko in fiziko (UL FMF)
Optical switching of bent-core liquid crystals with azocinnamoyl units
Luka Cmok, Simon Mattiazzi, Irena Drevenšek Olenik, Nerea Sebastián Ugarteche, Kristina Gak Simić, Nemanja Trišović, Mojca Vilfan
Izvirni znanstveni članek
Oznake: tekoči kristali z upognjeno sredico;fotopreklapljanje;azocinamat;optično preklapljanje;dinamika preklapljanja;bent-core liquid crystals;photo-switching;azocinnamoyl group;optical switching;switching dynamics;
We report on observations of optical switching in bent-core liquid crystals possessing azocinnamoyl groups in both elongated side arms. UV-activated switching was observed in two of the synthesised materials, both of which were studied optically and with dielectric spectroscopy. Polarising microscop ...
Leto: 2023 Vir: Fakulteta za matematiko in fiziko (UL FMF)
Running streams of a ferroelectric nematic liquid crystal on a lithium niobate surface
Luka Cmok, Virginie Coda, Nerea Sebastián Ugarteche, Alenka Mertelj, Marko Zgonik, Satoshi Aya, Mingjun Huang, Germano Montemezzani, Irena Drevenšek Olenik
Izvirni znanstveni članek
Oznake: fizika kondenzirane snovi;feroelektrični nematski tekoči kristali;električno polje;condensed matter physics;ferroelectric nematic liquid crystals;electric field;
Sessile droplets of a ferroelectric nematic liquid crystalline material were exposed to surface electric fields produced by pyroelectric and photogalvanic (photovoltaic) effects in X-cut iron-doped lithium niobate crystals. The resulting dynamic processes were monitored by polarisation optical (vide ...
Leto: 2023 Vir: Fakulteta za matematiko in fiziko (UL FMF)
Št. zadetkov: 8
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