Author Correction: Multifunctional light beam control device by stimuli-responsive liquid crystal micro-grating structures

Correction to: Scientific Reports https://doi.org/10.1038/s41598-020-70783-8, published online 14 August 2020 This Article contains a typographical error in the Acknowledgements section. “the Ministerio de Economía y Competitividad of Spain (TEC2013-47342-C2-2-R)” should read: "the Ministerio de Economía y Competitividad of Spain (TEC2016-77242-C3-1-R)"This work was supported by the Comunidad de Madrid and FEDER Program (S2018/NMT-4326), the Ministerio de Economía y Competitividad of Spain (TEC2013-47342-C2-2-R and TEC2016-76021-C2-2-R), the FEDER/Ministerio de Ciencia, Innovación y Universidades and Agencia Estatal de Investigación (RTC2017-6321-1, PID2019-109072RB-C31 and PID2019-107270RB-C21). The authors also acknowledge the support by the Ministry of National Defense of Poland (GBMON/13-995/2018/WAT), Military University of Technology (Grant no. 23-895)

Synthesis And Mesomorphic Properties Of Isothiocyanatotolanes

The synthesis, mesomorphic properties and visible spectra of 4′-substtituted alkyl-, alkoxy-, alkylcyclohexyl and alkylcyclohexylethyl-4-isothiocyanatotolanes have been described. Multicomponent mixtures with birefringence higher than 0.4 and low viscosity have been formulated. © 2002 SPIE · 0277-786X/02/$15.00

Liquid Crystalline Materials With High Birefringence

The mesogenic, optical, and dielectric properties of the new mixtures of high-birefringence nematic liquid crystals based on isothiocyȧnatotolanes are investigated, and examples of multicomponent mixtures with low viscosity and optical anisotropy Δn≈0.4 are presented. © 2005 Optical Society of America

Dielectric properties of selected laterally fluoro-substituted 4,4''-dialkyl, dialkoxy and alkyl-alkoxy [1:1';4':1'']terphenyls

Measurements of the complex permittivity, e* 1⁄4 e0 – i"00, within the frequency range 200 Hz to 10 MHz for 15 laterally fluoro-substituted terphenyls have been conducted. In most cases the substances exhibited the nematic phase over a broad temperature range. All substances were characterised by negative dielectric anisotropy, and are potentially useful for vertical alignment mode systems. The static permittivity tensor components have been analysed in relation to the dipole structure of the molecules. Dielectric relaxation processes observed in the liquid crystalline (LC) and solid rotator (R) phases (obtained by slow cooling of the samples) are characterised by calculation of the relaxation times and activation barriers. The rotation motions around the short axes are typical for LC phases, whereas rotations about the long axes, accompanied in some cases by internal motions, are present in the R phase

Low threshold voltage asymmetric antiferroelectric liquid crystal cells

Asymmetric antiferroelectric liquid crystal displays (AAFLCD) are attractive since they show a very well defined off state and fast switching time. Moreover, they can be driven by a simple biasless DC compensated waveform. The electrooptical response of an AAFLCD allows for new addressing modes, including quasi-static intermediate greyscales maintained without applying afield and passively addressed multiplexed high-frequency displays and spatial light modulators. A new kind of asymmetric cells have been obtained by using fluorinated block copolymer (FBC) alignment, which enhances surface segregation and provides a low energy surface. In this work we combine FBC alignment with antiferroelectric liquid crystal mixtures containing strongly electronegative fluorinated components. Threshold voltages for the antiferroelecttic-ferroelectric phase transition as low as 3 volts are observed. We report the time evolution of the shift of the electro-optical response

Aspherical liquid crystal lenses based on a variable transmission electrode

In this work, a technique to generate aspherical liquid crystal lenses with positive and negative optical power is experimentally demonstrated. The main enabling element is a micro-metric electrode with variable spatial size. This produces a decreasing resistance towards the lens centre that generates the desired voltage/phase profiles. Then, the voltage is homogeneously distributed across the active area of the lens by micro-metric concentric electrodes. As it is demonstrated, the phase shift can be controlled with voltages from 0 to 4.5 VRMS. As a result, parabolic profiles are obtained both for negative and positive optical powers. Furthermore, this approach avoids some disadvantages of previous techniques; parabolic profiles can be obtained with only one lithographic step and one or two voltage sources. Other complex aspherical profiles could be fabricated using the same technique, such as elliptical or hyperbolic ones.Funding: European Social Fund (NAWA PROM projekt nr POWR.03.03.00-00-PN13/18); Comunidad de Madrid and FEDER Program (S2018/NMT-4326); MCIN/ AEI/10.13039/501100011033 and European Union "Next generation EU"/PTR (PDC2021-121172-C21); MCIN/ AEI/10.13039/501100011033 and FEDER "A way to make Europe" (PID2019-107270RB-C21, PID2019-109072RB-C31, RTC-2017-6321-1)