Relevant bibliographies by topics / Liquid crystal devices (q-plate)

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Liquid crystal devices (q-plate)'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Liquid crystal devices (q-plate)"

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Chigrinov, Vladimir, Jiatong Sun, and Xiaoqian Wang. "Photoaligning and Photopatterning: New LC Technology." Crystals 10, no. 4 (2020): 323. http://dx.doi.org/10.3390/cryst10040323.

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We demonstrate a physical model of photoalignment and photopatterning based on rotational diffusion in solid azo-dye nanolayers. We also highlight the new applications of photoalignment and photopatterning in display and photonics such as: (i) liquid crystal (LC) E-paper devices, including optically rewritable LC E-paper on flexible substrates as 3D E-paper, as well as optically rewritable technology for photonics devices; (ii) photonics LC devices, such as LC Switches, polarization controllers and polarization rotators, variable optical attenuators, LC filled photonic crystal fiber, switchabl
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López-Morales, Guadalupe, María del Mar Sánchez-López, Ángel Lizana, Ignacio Moreno, and Juan Campos. "Mueller Matrix Polarimetric Imaging Analysis of Optical Components for the Generation of Cylindrical Vector Beams." Crystals 10, no. 12 (2020): 1155. http://dx.doi.org/10.3390/cryst10121155.

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In this work, we performed a Mueller matrix imaging analysis of two commercial optical components usually employed to generate and manipulate vector beams—a radial polarizer and a liquid-crystal q-plate. These two elements generate vector beams by different polarization mechanisms—polarizance and retardance, respectively. The quality of the vector beams relies on the quality of the device that generates them. Therefore, it is of interest to apply the well-established polarimetric imaging techniques to evaluate these optical components by identifying their spatial homogeneity in diattenuation,
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Xu, Jiachao, Tingfeng Ma, Liang Yan, et al. "Bulk Acoustic Wave Characteristics of Pseudo Lateral-Field-Excitation on LGT Single Crystal for Liquid Phase Sensing." Sensors 19, no. 5 (2019): 1076. http://dx.doi.org/10.3390/s19051076.

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In the present study, pseudo lateral-field-excitation (LFE) bulk acoustic wave characteristics on LGT crystals are investigated to increase the sensitivity of LFE devices on the liquid characteristic variations. The cut orientation of LGT crystals for pseudo-LFE is investigated and verified experimentally. For an LFE device in the pseudo-LFE mode, the thickness shear mode wave is excited by the thickness field rather than the lateral field. The present work shows that when the (yxl) 13.8° LGT plate is excited by the electric field parallel to the crystallographic axis x, it operates in the pse
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Anderson, J. E., P. Watson, and P. J. Bos. "Shortcomings of the Q Tensor Method for Modeling Liquid Crystal Devices." SID Symposium Digest of Technical Papers 30, no. 1 (1999): 198. http://dx.doi.org/10.1889/1.1833994.

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Chigrinov, Vladimir, Aleksey Kudreyko, and Qi Guo. "Patterned Photoalignment in Thin Films: Physics and Applications." Crystals 11, no. 2 (2021): 84. http://dx.doi.org/10.3390/cryst11020084.

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Photoalignment of liquid crystals by using azo dye molecules is a commonly proposed alternative to traditional rubbing alignment methods. Photoalignment mechanism can be well described in terms of rotational diffusion of azo dye molecules exposed by ultraviolet polarized light. A specific feature of the irradiated light is the intensity dependent change of azimuthal anchoring of liquid crystals. While there are various mechanisms of azo dye photoalignment, photo-reorientation occurs when dye molecules orient themselves perpendicular to the polarization of incident light. In this review, we des
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Quiceno-Moreno, Julio César, David Marco, María del Mar Sánchez-López, Efraín Solarte, and Ignacio Moreno. "Analysis of Hybrid Vector Beams Generated with a Detuned Q-Plate." Applied Sciences 10, no. 10 (2020): 3427. http://dx.doi.org/10.3390/app10103427.

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We use a tunable commercial liquid-crystal device tuned to a quarter-wave retardance to study the generation and dynamics of different types of hybrid vector beams. The standard situation where the q-plate is illuminated by a Gaussian beam is compared with other cases where the input beam is a vortex or a pure vector beam. As a result, standard hybrid vector beams but also petal-like hybrid vector beams are generated. These beams are analyzed in the near field and compared with the far field distribution, where their hybrid nature is observed as a transformation of the intensity and polarizati
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Prasetiadi, Ananto E., Matthias Jost, Baerbel Schulz, et al. "Liquid-crystal-based amplitude tuner and tunable SIW filter fabricated in LTCC technology." International Journal of Microwave and Wireless Technologies 10, no. 5-6 (2018): 674–81. http://dx.doi.org/10.1017/s1759078718000600.

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AbstractTunable microwave devices will play an important role in future wireless systems, in which high-frequency bands, e.g. millimeter waves, will become promising, due to its huge spectrum availability. At such frequency bands, liquid crystals (LCs) exhibit low microwave loss, which is excellent compared with the other tuning elements. In this paper, LC-based microwave components are fabricated by using low temperature co-fired ceramic technology, allowing the integration of the LC into microwave structures. The first component, the amplitude tuner, controls the signal's amplitude by using
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BOS, PHILIP J. "IMPROVEMENT OF THE VIEWING ANGLE FOR DISPLAY DEVICES WITH GRAY SCALE." International Journal of Modern Physics B 09, no. 18n19 (1995): 2585–95. http://dx.doi.org/10.1142/s0217979295000975.

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A liquid crystal electro-optical effect with an optically “self-compensating” director configuration is proposed to provide a device that has a wide angle of view at all gray levels. Calculations and data are presented to show the beneficial results of coupling a tunable birefringence L.C. device that has reverse pretilt alignment with a negative birefringence compensator plate.
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Zheng, Yuanzhen, Dudu Chen, Fei Sun, et al. "Effects of Polarity Inversion Layer on Performances of Lateral-Field-Excitation Piezoelectric Sensors Based on Lithium Niobate Single Crystal." Crystals 11, no. 4 (2021): 407. http://dx.doi.org/10.3390/cryst11040407.

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In this work, lateral-field-excitation (LFE) piezoelectric sensors based on polarity inversion layer are designed and fabricated, then frequency stabilities and sensitivities on electric property changes of liquids are tested. Because the polarity inversion layer can suppress the spurious modes, the stabilities of the LFE devices with a polarity inversion layer are obviously better than that of LFE devices with no polarity inversion layer. On the changes of liquid conductivity and permittivity, the sensitivities of the LFE devices with a polarity inversion layer are 2.4 times and 2.1 times hig
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Budaszewski, Daniel, and Tomasz R. Woliński. "Light propagation in a photonic crystal fiber infiltrated with mesogenic azobenzene dyes." Photonics Letters of Poland 9, no. 2 (2017): 51. http://dx.doi.org/10.4302/plp.v9i2.730.

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In this paper, light propagation in an isotropic photonic crystal fiber as well in a silica-glass microcapillary infiltrated with a mesogenic azobenzene dye has been investigated. It appeared that light spectrum guided inside the photonic crystal fiber infiltrated with the investigated azobenzene dye depends on the illuminating wavelength of the absorption band and on linear polarization. Also, alignment of the mesogenic azobenzene dye molecules inside silica glass microcapillaries and photonic crystal fibers has been investigated. Results obtained may lead to a new design of optically tunable
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Dissertations / Theses on the topic "Liquid crystal devices (q-plate)"

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Spencer, Timothy J. "Lattice Boltzmann method for Q-tensor nemato-dynamics in liquid crystal display devices." Thesis, Sheffield Hallam University, 2005. http://shura.shu.ac.uk/20393/.

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Nematic liquid crystals are fluids whose anisometric molecules show long range orientational order but no positional order. The orientational order gives rise to anisotropic properties that have widely been exploited as the basis for liquid crystal display devices. The Ericksen-Leslie director theory has successfully been used to describe many dynamic properties of liquid crystals however there are situations in which a more complete description may be given in terms of the second rank traceless symmetric Q-tensor. The development of a liquid crystal device solver is described. The solver calc
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Alameer, Maryam. "Polarization Dependent Ablation of Diamond with Gaussian and Orbital Angular Momentum Laser Beams." Thesis, Université d'Ottawa / University of Ottawa, 2019. http://hdl.handle.net/10393/39850.

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The vectorial nature (polarization) of light plays a significant role in light-matter interaction that leads to a variety of optical devices. The polarization property of light has been exploited in imaging, metrology, data storage, optical communication and also extended to biological studies. Most of the past studies fully explored and dealt with the conventional polarization state of light that has spatially symmetric electrical field geometry such as linear and circular polarization. Recently, researchers have been attracted to light whose electric field vector varies in space, the s
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Rafayelyan, Mushegh. "Singular beam shaping from spin-orbit flat optics." Thesis, Bordeaux, 2017. http://www.theses.fr/2017BORD0583/document.

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Dans ce travail nous avons résolu deux problèmes principaux de la mise en forme topologique de faisceau paraxial pour les composants plans : la modalité et le polychromatisme.Nous les résolvons en introduisant de nouveaux concepts d’éléments optiques à interaction spin orbite,à savoir la “q-plate modale” et la “q-plate Bragg-Berry”. D’un côté, la q-plate modale convertit un faisceau gaussien incident en un faisceau de Laguerre-Gauss pour un indice radial et un indice d’azimut donnés, ce qui par conséquent dépasse les capacités des q-plates conventionnelles qui ne modifient que le degré de libe
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Book chapters on the topic "Liquid crystal devices (q-plate)"

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Kalantar, K. "Backlighting unit optics: optical micro-reflectors and micro-deflectors for functional light-guide plate." In High Quality Liquid Crystal Displays and Smart Devices - Volume 1: Development, display applications and components. Institution of Engineering and Technology, 2019. http://dx.doi.org/10.1049/pbcs068f_ch20.

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Conference papers on the topic "Liquid crystal devices (q-plate)"

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Funazaki, K., Y. Tarukawa, T. Kudo, S. Matsuno, R. Imai, and S. Yamawaki. "Heat Transfer Characteristics of an Integrated Cooling Configuration for Ultra-High Temperature Turbine Blades: Experimental and Numerical Investigations." In ASME Turbo Expo 2001: Power for Land, Sea, and Air. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/2001-gt-0148.

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This paper deals with fundamental research on heat transfer characteristics inside a cooling configuration designed for an ultra-high temperature turbine nozzle. The cooling configuration adopted in this study integrates impingement cooling and pin cooling devices into one body, aiming at the enhancement of the effective area for the impingement cooling. A large-scaled test model of this cooling system is constructed to measure its internal heat transfer distribution, where a number of pins are sandwiched between an impingement plate and a target plate. The target plate are provided with sever
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Rumala, Yisa, Sebastião Pratavieira, Giovanni Milione, et al. "Supercontinuum light vector beam generation with a tunable liquid crystal q-plate." In Frontiers in Optics. OSA, 2013. http://dx.doi.org/10.1364/fio.2013.ftu1f.4.

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Chen, Pin-Chuan, Michael W. Mitchell, Dimitris E. Nikitopoulos, Steven A. Soper, and Michael C. Murphy. "Assessment and Improvement of the Thermal Performance of a Polycarbonate Micro Continuous Flow Polymerase Chain Reactor (CFPCR)." In ASME 2007 InterPACK Conference collocated with the ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/ipack2007-33330.

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BioMEMS are compact devices that use microfabrication to miniaturize benchtop instrumentation. Due to the requirement for uniform temperature distributions over restricted areas, thermal isolation, and faster heating and cooling rates in a limited space, thermal management is a key to ensuring successful performance of BioMEMS devices. The continuous flow polymerase chain reactor (CFPCR) is a compact BioMEMS device that is used to amplify target DNA fragments using repeated thermal cycling. The temperature distribution on the backside of a micro CFPCR was measured using thermochromic liquid cr
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Ito, Masami, Atsushi Fukui, Kanji Nishii, and Kenji Takamoto. "Method of measure the thickness of liquid crystal layer using phase plate." In International Symposium on Polarization Analysis and Applications to Device Technology, edited by Toru Yoshizawa and Hideshi Yokota. SPIE, 1996. http://dx.doi.org/10.1117/12.246256.

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Martinez-Denegri, Guillermo, Johann Toudert, Mariia Kramarenko, et al. "Flexible Periodic Half-Cylinder Photonic Plate as a Light Recycling Device Applicable to Liquid Crystal Displays." In 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC). IEEE, 2019. http://dx.doi.org/10.1109/cleoe-eqec.2019.8872500.

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Vladimirov, Fiodor L., Aleksander N. Chaika, Ivan E. Morichev, and N. I. Pletnyova. "Speed of response analysis of optically controlled transparent photoconductor liquid crystal plates in a holographic correlator." In Coherent Measuring and Data Processing Methods and Devices: Selected Papers, edited by Valery I. Mandrosov. SPIE, 1993. http://dx.doi.org/10.1117/12.155064.

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Defranoux, Christophe, and Jean-Louis P. Stehle. "Thickness and index measurements of 8-um liquid crystal gap between plates by spectroscopic ellipsometry." In International Symposium on Polarization Analysis and Applications to Device Technology, edited by Toru Yoshizawa and Hideshi Yokota. SPIE, 1996. http://dx.doi.org/10.1117/12.246257.

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Fujimoto, Takaya, Kenji Yamashita, Satoshi Nishida, Daiji Noda, and Tadashi Hattori. "Fabrication of High Performance Light Guide Plate and New Design for High Luminance." In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-40326.

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Recently, LED (Light Emitting Diode) is paid to attention as a new source of light. However, it doesn’t turn to shine on a wide area efficiently because LED is a point light. Then, the method of the light guide plate technology used for the liquid crystal display etc, and use as the LED lighting is examined. A minute reflection dots exists bottom of the light guide plate, system is such that light comes out from the surface because the light that hits the dots break a total reflection condition. In our laboratory, the function of the diffusion seat and the condensing prism seat that is complet
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Xie, Xuan, Yuxing Liang, and Yuantai Hu. "Analysis on the interaction of two micro-beams immersed in liquid upper a quartz crystal plate and the induced frequency shift." In 2017 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA). IEEE, 2017. http://dx.doi.org/10.1109/spawda.2017.8340379.

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Van Treuren, Kenneth W., Zoulan Wang, Peter Ireland, Terry V. Jones, and S. T. Kohler. "The Role of the Impingement Plate in Array Heat Transfer." In ASME 1996 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1996. http://dx.doi.org/10.1115/96-gt-162.

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Most research involving arrays of impinging jets was conducted using steady state techniques which allow the impingement plate (through which the gas flows) to achieve an equilibrium (adiabatic) temperature during the test. Invariably, the impingement plate temperature was not reported for these tests as the floating temperature condition was taken to be representative of conditions in the application being modeled. Thermal analysis of gas turbine conditions showed the present authors that conditions in the engine could often be significantly different from this floating plate temperature stat
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