Highly photorefractive hybrid liquid crystal device for a video-rate holographic display

Li, Xiao; Li, Yan; Xiang, Ying; Na, Rong; Zhou, Pengcheng; Liu, Shuxin; Lu, Jiangang; Su, Yikai

doi:10.1364/oe.24.008824

Cited by 19 publications

(7 citation statements)

References 26 publications

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“…The cell was titled at 45° relative to the bisector of the two recording beams, aiming to achieve large refractive index change and high diffraction efficiency [12]. A 460 nm laser was employed for recording holograms, since the ZnS/InP QD exhibits a high absorption at around 460 nm [10,18]. We set the recording beam as p-polarized.…”

Section: -4 / Y Wangmentioning

confidence: 99%

35‐4: Color holographic display using quantum‐dot doped liquid crystal

Wang

Zhou

et al. 2019

Symp Digest of Tech Papers

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We propose the use of a nematic liquid crystal (LC) doped with quantum dots (QDs) to realize a color 3D holographic display. The material has super large optical nonlinearity and could achieve a fast response time ~ 8.46ms. The constructed 3D display shows images at different depths and vivid RGB images at a video refresh rate. Author KeywordsColor holographic display; nematic liquid crystal; quantum dots. Objective and backgroundHolographic display has attracted worldwide attention as a promising three-dimensional (3D) display technique. It can reconstruct both the phase and amplitude information of an object or a scene, as if it comes from a nature scene [1-3]. However, it is difficult to display a wide-view and color holographic images by using a traditional electrically-addressed spatial light modulator(SLM) due to its limited bandwidth [4][5][6][7]. Therefore, photorefractive (PR) materials become a kind of choice to produce a vivid 3D display [8]. Among them, photorefractive polymer has many advantages such as high spatial resolution and high diffraction efficiency. Nevertheless, photorefractive polymer cannot achieve a fast response time to realize a real-time display. In our previous work, without applying any external voltage, we employed an azo-dye doped nematic LC [9] material to display a 25-Hz holographic video. In addition, a quantum dot (QD) doped nematic LC was also applied for holographic display [10], which could achieve high efficiency and fast response, simultaneously.

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Section: -4 / Y Wangmentioning

confidence: 99%

35‐4: Color holographic display using quantum‐dot doped liquid crystal

Wang

Zhou

et al. 2019

Symp Digest of Tech Papers

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“…Indium tin oxide (ITO, square resistance ≤ 10 Ω) were cleaned by washing with acetone, distilled water and THF sequentially in an ultrasonic bath before use. The PR sample, N-ethyl carbazole (ECz) and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) were simultaneously dissolved in THF and then filtered through a 0.2 μm pore Teflon membrane filter. The filtrated solution was dropped onto two ITO glass plates at room temperature.…”

Section: Pr Device Fabrication and Tbc Measurementmentioning

confidence: 99%

“…Photorefractive (PR) effect is seen in some materials that combine photoconductivity and nonlinear optical (NLO) response to modulate the refractive index of the medium, [1][2][3] and has attracted great amounts of attention due to their potential applications, such as updatable three-dimensional (3D) holographic display, high-density optical data storage, and optical imaging processing, etc. [3][4][5][6] In comparison with traditional inorganic PR materials, the organic ones have become a focus recently due to their benefits like low-cost, ease in processability, and the possibility to tune their properties through modification of chemical or compositional properties, etc. Organic PR mechanism (Chart S1, ESI †) [1][2][3] indicates that organic PR composites are composed of photoconductors, photosensitizers, NLO chromophores and trapping center.…”

Section: Introductionmentioning

confidence: 99%

Photorefractive hyper-structured molecular glasses constructed by calix[4]resorcinarene core and carbazole-based methine nonlinear optical chromophore

Fang(

et al. 2017

Dyes and Pigments

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Seven C-methylcalix[4]resorcinarene (CRA)-based photorefractive (PR) hyper-structured molecular glasses (HSMGs) containing carbazole-based methine nonlinear optical (NLO) chromophores were designed and synthesized via esterification between carboxyl-containing asymmetric CRA core molecule and hydroxyl-containing functional compounds. When the feed ratio of hydroxyl-containing NLO functional compounds to carboxyl groups of CRA-COOH was kept at 1.5/1 by mole, the degree of introduction of NLO chromophore to the CRA core was above 70%. All the HSMGs show low glass transition temperatures (Tg), and good solubility in common low boiling point solvents such as THF, CHCl3, etc. Powder XRD and UV-vis absorption in films of HSMGs indicate that the aggregation, packing and crystallization of the NLO chromophores in these HSMGs had been effectively reduced. Doping with Nethyl-carbazole (ECz) as a plasticizer and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) as a photosensitizer, all the HSMGs composites showed good PR effects. All the coupling gain coefficients (Γ) of HSMGs-based composites are about twice to the corresponding small molecular NLO chromophores-based composites, thanks to the decreased NLO chromophores antiparallel packing caused by the asymmetric CRA core. Among them, CRA-CSN/ECz/PCBM (69:30:1, wt.%) composite exhibited the best performance with the Γ value of 78.2 cm-1 at the external electric field of 12.5 V μm-1 , which is one of the best performance in molecular glasses under the same test conditions. Coupled with their convenient synthesis, this work will provide a new simple design strategy for organic PR materials.

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“…Optical holographic display based on photorefractive (PR) holographic materials is one of the effective approaches to realize real-time dynamic holographic 3D display. Peyghambarian et al 7,8 successively realized a monochrome holographic 3D display with a refresh time of 3.0 minutes and then 2.0 seconds based on a PR organic polymer. Su et al 9 brought out a refresh rate of 10 Hz based on quantum dot-doped liquid crystals.…”

Section: Introductionmentioning

confidence: 99%

The real-time dynamic holographic display of LN:Bi,Mg crystals and defect-related electron mobility

Wang¹,

Shan²,

Zheng³

et al. 2022

OEA

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Holographic display has attracted widespread interest because of its ability to show the complete information of the object and bring people an unprecedented sense of presence. The absence of ideal recording materials has hampered the realization of their commercial applications. Here we report that the response time of a bismuth and magnesium codoped lithium niobate (LN:Bi,Mg) crystal is shortened to 7.2 ms and a sensitivity as high as 646 cm/J. The crystal was used to demonstrate a real-time holographic display with a refresh rate of 60 Hz, as that of the popular high-definition television. Moreover, the first-principles calculations indicate that the electron mobility while Bi occupying Nb-site is significantly greater than that in Li-site, which directly induces the fast response of LN:Bi,Mg crystals when the concentration of Mg is above its doping threshold.

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Highly photorefractive hybrid liquid crystal device for a video-rate holographic display

Cited by 19 publications

References 26 publications

35‐4: Color holographic display using quantum‐dot doped liquid crystal

35‐4: Color holographic display using quantum‐dot doped liquid crystal

Photorefractive hyper-structured molecular glasses constructed by calix[4]resorcinarene core and carbazole-based methine nonlinear optical chromophore

The real-time dynamic holographic display of LN:Bi,Mg crystals and defect-related electron mobility

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