Inge Nys
YOU?
Author Swipe
Transmissive Multilayer Geometric Phase Gratings Using Water-Soluble Alignment Material Open
Multilayer liquid crystal devices can offer enhanced optical functionalities for augmented reality and photonic applications, but fabrication remains severely limited by solvent incompatibility between photoalignment materials and underlyi…
Electrically Switchable Multi‐Stable Topological States Enabled by Surface‐Induced Frustration in Nematic Liquid Crystal Cells Open
In liquid crystal (LC) cells, the surface patterning directs the self‐assembly of the uniaxial building blocks in the bulk, enabling the design of stimuli‐response optical devices with various functionalities. The combination of different …
Photopatterned Anchoring Stabilizing Monodomain Blue Phases Open
Blue phase liquid crystals (BPLCs) are chiral self-assembled three-dimensional (3D) periodic structures which have attracted a lot of attention due to their electro-optical properties, relevant for tunable soft photonic crystals and fast-r…
View article: Liquid Crystal 3D Optical Waveguides Based on Photoalignment
Liquid Crystal 3D Optical Waveguides Based on Photoalignment Open
A novel design and approach for the realization of liquid crystal optical waveguides using photopatterning as a manufacturing method is presented. The developed method is used to demonstrate straight waveguides of different widths and curv…
Single Order Diffraction at a Negative Angle Based on a Chiral Liquid Crystal with an Inclined Helix Open
Negative refraction is a phenomenon in which light, when striking a material at an oblique angle, undergoes refraction toward the same side with respect to the surface normal. Over the past two decades, various approaches have emerged for …
Chiral Liquid-Crystal-Based Concave Holographic Spectrometer on a Curved Substrate Open
Chiral liquid crystals (CLCs) self-assemble into a helical structure and can efficiently reflect circularly polarized light with corresponding handedness. Utilizing a curved glass substrate and polymerization of photoaligned CLCs, the oper…
Diffractive optical elements based on photoaligned liquid crystals: reflective and transmissive devices with different functionalities Open
Diffractive optical elements (DOEs) are increasingly used as miniaturized and lightweight components in photonic devices. Efficient steering of light can be obtained with the help of photoaligned liquid crystal (LC) devices that modulate t…
30‐1: <i>Invited Paper:</i> Chiral liquid crystal layers with patterned photoalignment for thin diffractive optical components Open
The ability of liquid crystal to self‐organize into complicated structures can be harnessed in applications such as thin film optical devices, diffraction gratings or smart windows. In this work we focus on liquid crystal layers in contact…
Two-Dimensional Liquid-Crystal Photoalignment by Multiple Illumination Steps Open
Photoalignment can define the average liquid-crystal (LC) orientation when a photosensitive material is illuminated with linearly polarized light. For azo-based materials, the alignment is perpendicular to the direction of the linear polar…
Geometric Phase Flat Optical Gratings with High Diffraction Angle Based on Dual‐Frequency Nematic Liquid Crystal Open
Diffractive optical elements (DOEs) are increasingly used as lightweight and compact solutions in photonic devices. Steering of light and manipulation of the polarization can be efficiently obtained with the help of photo‐aligned liquid cr…
View article: Polarization microscope simulations using an efficient transfer matrix-based beam propagation method
Polarization microscope simulations using an efficient transfer matrix-based beam propagation method Open
A technique for white light polarizing microscope simulations is presented. It uses wide-angle diffraction and accurately simulates the transfer properties of the imaging system, including the objective's finite numerical aperture, coheren…
View article: Polarization microscope simulations using an efficient transfer matrix-based beam propagation method
Polarization microscope simulations using an efficient transfer matrix-based beam propagation method Open
A technique for white light polarizing microscope simulations is presented. It uses wide-angle diffraction and accurately simulates the transfer properties of the imaging system, including the objective's finite numerical aperture, coheren…
Lateral electric field switching in thin ferroelectric nematic liquid crystal cells Open
Permanent polarization orients antiparallel to the rubbing direction or parallel to the electric field.
Chiral liquid crystal based holographic reflective lens for spectral detection Open
Flat optics based on chiral liquid crystal (CLC) can be achieved using holographic polarization recording with the help of a photoalignment technique to vary the orientation of the optical axis in a thin CLC layer. A variety of reflective …
Photoaligned Chiral Liquid Crystal Grating with Hysteresis Switching Open
Metastable topological states are known to arise when chiral liquid crystal (CLC) is infiltrated in a geometry with strong confinement. This study demonstrates an alternative approach to obtain multistable states, by combining patterned su…
Two‐Step Photoalignment with High Resolution for the Alignment of Blue Phase Liquid Crystal Open
The self‐assembling properties of liquid crystal (LC) are ideal for realizing switchable optical components. The director organization is strongly determined by the alignment at the substrate interfaces and photoalignment is a versatile me…
Photoaligned Liquid Crystal Devices with Switchable Hexagonal Diffraction Patterns Open
Highly efficient optical diffraction can be realized with the help of micrometer-thin liquid crystal (LC) layers with a periodic modulation of the director orientation. Electrical tunability is easily accessible due to the strong stimuli-r…
Submicrometer photoalignment for photonic components based on tilted chiral liquid crystal Open
Using the principle of photo-alignment it has become possible to pattern the orientation of liquid crystal on a substrate. With this approach liquid crystal gratings and lenses with high optical quality have been realized. Recently we have…
Influence of period and surface anchoring strength in liquid crystal optical axis gratings Open
LC-based geometric phase optics are becoming increasingly promising. Our research provides an in-depth study of the behavior of small-period LC optical axis gratings, leading to the fabrication of higher quality optical components.
Nematic Liquid Crystal Disclination Lines Driven by A Photoaligned Defect Grid Open
Photoalignment for nematic liquid crystals makes it possible to design complex alignment patterns with point defects, that can act as anchoring points for disclination lines. This feature may be used to realize novel electro‐optical device…
Fringe-field-induced out-of-plane reorientation in vertically aligned nematic spatial light modulators and its effect on light diffraction Open
Liquid crystal (LC)-based spatial light modulators (SLMs) have the ability to shape the wavefront of a light beam and are widely used in applications where phase or amplitude modulation is required. In this work we study the LC director co…
Patterned surface alignment to create complex three-dimensional nematic and chiral nematic liquid crystal structures Open
Combining liquid crystals (LCs) with well-designed anchoring patterns at the substrates offers tremendous potential for the development of functional electro-optic devices or stimuli-responsive actuators. Photo-alignment techniques nowaday…
Surface Stabilized Topological Solitons in Nematic Liquid Crystals Open
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 illuminati…
View article: Large Angle Forward Diffraction by Chiral Liquid Crystal Gratings with Inclined Helical Axis
Large Angle Forward Diffraction by Chiral Liquid Crystal Gratings with Inclined Helical Axis Open
A layer of chiral liquid crystal (CLC) with a photonic bandgap in the visible range has excellent reflective properties. Recently, two director configurations have been proposed in the literature for CLC between two substrates with periodi…