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Št. zadetkov: 6
Ray-based optical visualisation of complex birefringent structures including energy transport
Guilhem Poy, Slobodan Žumer
Izvirni znanstveni članek
Oznake: fizika mehke snovi;tekoči kristali;optika;dvolomnost;soft matter physics;liquid crystals;optics;birefringence;
We propose an efficient method to simulate light propagation in lossless and non-scattering uniaxial birefringent media, based on a standard ray-tracing technique supplemented by a newly-derived transport equation for the electric field amplitude along a ray and a tailored interpolation algorithm fo ...
Leto: 2019 Vir: Fakulteta za matematiko in fiziko (UL FMF)
Physics-based multistep beam propagation in inhomogeneous birefringent media
Guilhem Poy, Slobodan Žumer
Izvirni znanstveni članek
Oznake: optika;optics;
We present a unified theoretical framework for paraxial and wide-angle beam propagation methods in inhomogeneous birefringent media based on a minimal set of physical assumptions. The advantage of our schemes is that they are based on differential operators with a clear physical interpretation and e ...
Leto: 2020 Vir: Fakulteta za matematiko in fiziko (UL FMF)
Surface stabilized topological solitons in nematic liquid crystals
Inge Nys, Brecht Berteloot, Guilhem Poy
Izvirni znanstveni članek
Oznake: nematski tekoči kristali;topološki solitoni;optika;nematic liquid crystals;topological solitons;optics;
Photo-alignment is a versatile tool to pattern the alignment at the confining substrates in a liquid crystal (LC) cell. Arbitrary alignment patterns can be created by using projection with a spatial light modulator (SLM) for the illumination. We demonstrate that a careful design of the alignment pat ...
Leto: 2020 Vir: Fakulteta za matematiko in fiziko (UL FMF)
Ring-shaped liquid crystal structures through patterned planar photo-alignment
Brecht Berteloot, Inge Nys, Guilhem Poy, Jeroen Beeckman, Kristiaan Neyts
Izvirni znanstveni članek
Oznake: fizika mehke snovi;tekoči kristali;soft matter physics;liquid crystals;
Patterned liquid crystal (LC) configurations find widespread applications in functional devices such as lenses, gratings, displays and soft-robots. In combination with external stimuli such as an applied electric field, photo-alignment at the surfaces offers an attractive way to stabilize different ...
Leto: 2020 Vir: Fakulteta za matematiko in fiziko (UL FMF)
Chirality-enhanced periodic self-focusing of light in soft birefringent media
Guilhem Poy, Andrew J. Hess, Ivan I. Smalyukh, Slobodan Žumer
Izvirni znanstveni članek
Oznake: fizika mehke snovi;tekoči kristali;optika;soft matter physics;liquid crystals;optics;
We experimentally and numerically show that chirality can play a major role in the nonlinear optical response of soft birefringent materials, by studying the nonlinear propagation of laser beams in frustrated cholesteric liquid crystal samples. Such beams exhibit a periodic nonlinear response associ ...
Leto: 2020 Vir: Fakulteta za matematiko in fiziko (UL FMF)
Control of light by topological solitons in soft chiral birefringent media
Andrew J. Hess, Guilhem Poy, Jung-Shen B. Tai, Slobodan Žumer, Ivan I. Smalyukh
Izvirni znanstveni članek
Oznake: fizika mehke snovi;tekoči kristali;solitoni;optika;soft matter physics;liquid crystals;solitons;optics;
In practically all branches of physics, different types of solitons, with a number of them enjoying topological protection, are found. Here we explore how one- and two-dimensional topological solitons formed by spatially localized continuous orientational patterns of optical axis in uniaxial birefri ...
Leto: 2020 Vir: Fakulteta za matematiko in fiziko (UL FMF)
Št. zadetkov: 6
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