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liquid crystal-integrated metasurfaces for an active photonic platform

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Opto-Electronic Advances 2024年第6期7卷 5-29页

作者： Dohyun Kang Hyeonsu Heo Younghwan Yang Junhwa Seong Hongyoon Kim Joohoon Kim Junsuk Rho Department of Mechanical Engineering Pohang University of Science and Technology(POSTECH)Pohang 37673Republic of Korea Department of Chemical Engineering Pohang University of Science and Technology(POSTECH)Pohang 37673Republic of Korea Department of Electrical Engineering Pohang University of Science and Technology(POSTECH)Pohang 36763Republic of Korea POSCOPOSTECH-RIST Convergence Research Center for Flat Optics and Metaphotonics Pohang 37673Republic of Korea National Institute of Nanomaterials Technology(NINT) Pohang 37673Republic of Korea

Metasurfaces have opened the door to next-generation optical devices due to their ability to dramatically modulate electromagnetic waves at will using periodically arranged ***,metasurfaces typically have static optical responses with fixed geometries of nanostructures,which poses challenges for implementing transition to technology by replacing conventional optical *** solve this problem,liquid crystals(LCs)have been actively employed for designing tunable metasurfaces using their adjustable birefringent in real ***,we review recent studies on LCpowered tunable metasurfaces,which are categorized as wavefront tuning and spectral *** to numerous reviews on tunable metasurfaces,this review intensively explores recent development of LC-integrated *** the end of this review,we briefly introduce the latest research trends on LC-powered metasurfaces and suggest further directions for improving *** hope that this review will accelerate the development of new and innovative LC-powered devices.

关键词： tunable metasurface liquid crystal active metasurface electrically tunable optical system

Holographic Polymer Nanocomposites with High Refractive Index Modulation by Doping liquid crystal E6M

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Chinese Journal of Polymer Science 2024年第7期42卷 926-935,I0006页

作者： Meng-Yun Wang Yue Zhang Dan Wang Ming Yao Yi-Xuan Wang Xing-Ping Zhou Hai-Yan Peng Xiao-Lin Xie Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of EducationSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan430074China State Key Laboratory of Materials Processing and Die&Mould Technology Huazhong University of Science and TechnologyWuhan430074China National Anti-counterfeit Engineering Research Center Huazhong University of Science and TechnologyWuhan430074China

Holographic optical elements(HOEs)based on polymer composites have become a research hot spot in recent years for augmented reality(AR)due to the significant improvement of optical performance,dynamic range,ease of processing and high yield ***,it remains a formidable challenge to obtain a large field of view(FOV)and brightness due to the limited refractive index ***,we report an effective method to tackle the challenge by doping an epoxy liquid crystal termed E6M,which enables a large refractive index modulation of 0.050@633 nm and low haze of 5.0%at a doping concentration of 5 wt%.This achievement may be ascribed to the improved molecular ordering of liquid crystals within the holographic polymer *** high refractive index modulation can endow transmission-type holographic polymer composites with a high diffraction efficiency of 96.2%at a small thickness of 5μm,which would promise the design of thin and lightweight AR devices.

关键词： Polymer nanocomposites Holography AR/VR Refractive index modulation liquid crystal

liquid crystal-based optical aptasensor for the sensitive and selective detection of Gram-negative bacteria

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Science China Chemistry 2022年第10期65卷 2023-2030页

作者： Mengjun Liu Minmin Zhang Jiamei Chen Ruizhi Yang Zhaofan Huang Zhenping Liu Na Li Lingling Shui Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices School of Information and Optoelectronic Science and EngineeringSouth China Normal UniversityGuangzhou 510006China Joint Laboratory of Optofluidic Technology and Systems National Center for International Research on Green OptoelectronicsSouth China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou 510006China

The sensitive and differential detection of Gram-negative bacteria is essential in food processing,environmental monitoring,and the daily chemical ***,we propose and validate a liquid crystal(LC)-based aptasensor for the ultrasensitive detection of Escherichia coli(***),a model of Gram-negative *** nematic liquid crystal of 4-cyano-4’-pentylbiphenyl(5 CB) molecules can be orderly or disorderly arranged at the LC-aqueous interface via different stimuli,causing changes in optical texture due to *** schlieren texture is observed when a mixture solution of aptamer and hexadecyl trimethyl ammonium bromide(CTAB) is dripped onto the segmented LC films on a copper *** specific binding of aptamers with target bacteria biomarkers liberates the CTAB molecules,which then self-assemble at the LC-aqueous interface to induce the vertical alignment of *** optical transition from bright to dark is therefore achieved via the LC molecular orientation and serves as an *** the prominent affinity and specificity of the aptamer,the established sensitive and selective *** assay shows an ultralow detection limit of 27 cfu/*** prepared aptasensor can also be applied for the sensitive and selective determination of *** in fruit juice,soft drink,and cosmetic products,and shows great promise for the on-site detection of Gram-negative bacteria with high sensitivity and specificity for environmental monitoring,food safety assessment,and household chemical inspection.

关键词： liquid crystal molecular arrangement optical sensor aptamer Gram-negative bacteria

Semi-interpenetrating-network all-solid-state polymer electrolyte with liquid crystal constructing efficient ion transport channels for flexible solid lithium-metal batteries

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Journal of Energy Chemistry 2022年第4期31卷 157-167页

作者： Qinghui Zeng Yu Lu Pingping Chen Zhenfeng Li Xin Wen Wen Wen Yu Liu Shuping Zhang Hailei Zhao Henghui Zhou Zhi-xiang Wang Liaoyun Zhang School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049China College of Chemistry and Molecular Engineering Peking UniversityBeijing 100871China School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China Pulead Technology Industry Co. LtdBeijing 102200China

The development of the solid-state polymer electrolytes (SPEs) for Li-ion batteries (LIBs) can effectively address the hidden safety issues of commercially used liquid ***,the unsatisfactory room temperature ion conductivity and inferior mechanical strength for linear PEO-based SPEs are still the immense obstacles impeding the further applications of SPEs for large-scale ***,we fabricate a series of semi-interpenetrating-network (semi-IPN) polymer electrolytes based on a novel liquid crystal (C6M LC) and poly(ethylene glycol) diglycidyl ether (PEGDE) via UV-irradiation at the first *** LCs not only highly improve the mechanical properties of electrolyte membranes via the construction of network structure with PEGDE,but also create stable ion transport channels for ion *** a result,a free-standing flexible SPE shows outstanding ionic conductivity(5.93×10^(-5) S cm^(-1) at 30℃),a very wide electrochemical stability window of 5.5 V,and excellent thermal stability at thermal decomposition temperatures above 360℃ as well as the capacity of suppressing lithium dendrite ***,the LiFePO_(4)/Li battery assembled with the semi-IPN electrolyte membranes exhibits good cycle performance and admirable reversible specific *** work highlights the obvious advantages of LCs applied to the electrolyte for the advanced solid lithium battery.

关键词： Solid-state polymer electrolyte liquid crystal Semi-interpenetrating-network Ion transport channels Lithium battery

Flat multifunctional liquid crystal elements through multi-dimensional information multiplexing

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Opto-Electronic Advances 2023年第4期6卷 39-47页

作者： Dongliang Tang Zhenglong Shao Xin Xie Yingjie Zhou Xiaohu Zhang Fan Fan Shuangchun Wen Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education&Hunan Provincial Key Laboratory of Low-Dimensional Structural Physics and Devices School of Physics and ElectronicsHunan UniversityChangsha 410082China Key Laboratory of Light Field Manipulation and Information Acquisition Ministry of Industry and Information Technologyand Shaanxi Key Laboratory of Optical Information TechnologySchool of Physical Science and TechnologyNorthwestern Polytechnical UniversityXi’an 710129China Key Laboratory of Optoelectronic Technology and Systems of the Education Ministry of China Chongqing UniversityChongqing 400044China

Flat optical elements have attracted enormous attentions and act as promising candidates for the next generation of optical *** one of the most outstanding representatives,liquid crystal(LC)has been widely applied in flat panel display industries and inspires the wavefront modulation with the development of LC alignment ***,most LC elements perform only one type of optical manipulation and are difficult to realize the multifunctionality and light ***,flat multifunctional liquid crystal elements(FMLCEs),merely composed of anisotropic LC molecules with space-variant orientations,are presented for multichannel information manipulation by means of polarization,space and wavelength ***,benefiting from the unique light response with the change of the incident polarization,observation plane,and working wavelength,a series of FMLCEs are demonstrated to achieve distinct near-and far-field display *** proposed strategy takes full advantage of basic optical parameters as the decrypted keys to improve the information capacity and security,and we expect it to find potential applications in information encryption,optical anti-counterfeiting,virtual/augmented reality,etc.

关键词： multifunctional liquid crystal holography information multiplexing

High laser damage threshold reflective optically addressed liquid crystal light valve based on gallium nitride conductive electrodes

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High Power Laser Science and Engineering 2022年第6期10卷 8-14页

作者： Zhibo Xing Wei Fan Dajie Huang He Cheng Tongyao Du National Laboratory on High Power Laser and Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghaiChina Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijingChina

In this paper,the feasibility of a high laser damage threshold liquid crystal spatial light modulator based on gallium nitride(GaN)transparent conductive electrodes is *** laser-induced damage threshold(LIDT)is measured,and a high LIDT reflective optically addressed liquid crystal light valve(OALCLV)based on GaN is designed and *** proper work mode of the OALCLV is determined;the OALCLV obtained a maximum reflectivity of about 55%and an on–off ratio of 55:1,and an image response is demonstrated.

关键词： gallium nitride laser-induced damage threshold liquid crystal optically addressed liquid crystal light valve

Circularly polarized luminescence based on cholesterol-tetraphenylethylene-perylene liquid crystal

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Chinese Chemical Letters 2022年第5期33卷 2442-2446页

作者： Shengjie Jiang Shujuan Zhou Ying Chen Hongyu Guo Fafu Yang College of Chemistry and Materials Science Fujian Normal UniversityFuzhou 350007China Fujian Key Laboratory of Polymer Materials Fuzhou 350007China Fujian provincial Key Laboratory of Advanced Materials Oriented Chemical Engineering Fuzhou 350007China

Perylene derivative with circularly polarized luminescence(CPL) at aggregated state was seldom reported due to the strong ACQ(aggregation-caused quench) effect at aggregation. In this work, a novel cholesterol-tetraphenylethylene-perylene derivative(TPE-P) was designed and synthesized in moderate yield. It exhibited liquid crystalline behavior with orderly hexagonal columnar mesophase and good fluorescence emission at long wavelength(600-700 nm) not only in solution but also at aggregated states based on the AIE(aggregation-induced emission)-FRET(fluorescence resonance energy transfer) effect between tetraphenylethylene unit and perylene moiety. Moreover, the circular dichroism(CD) and CPL studies suggested the effective chiral transfer from cholesterol unit to tetraphenylethylene unit and perylene skeleton due to the spiral liquid crystalline self-assembly. The CD and CPL signals showed the order of THF liquid crytalline phase was an effective method to construct normal dye with excellent CPL property in aggregated state.

关键词： Tetraphenylethylene Perylene Circularly polarized luminescence liquid crystal FRET

liquid crystal devices for vector vortex beams manipulation and quantum information applications [Invited]

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Chinese Optics Letters 2021年第11期19卷 124-132页

作者：李志向阮亚平陈鹏唐杰胡伟夏可宇陆延青 National Laboratory of Solid State Microstructures College of Engineering and Applied Sciencesand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China School of Science Nantong UniversityNantong 226019China

Vector vortex beams(VVBs) have attracted significant attention in both classical and quantum optics. liquid crystal(LC),beyond its applications in information display, has emerged as a versatile tool for manipulating VVBs. In this review, we focus on the functions and applications of typical LC devices in recent studies on controlling the space-variant polarized vortex light. Manipulation of VVBs through patterned nematic LC optical elements, patterned cholesteric LC optical elements, self-assembled defects, and LC spatial light modulators is discussed separately. Moreover, LC-based novel optical applications in the field of quantum information are reviewed.

关键词： liquid crystal vector beam q-plate orbital angular momentum entanglement two-photon interference

Computational spectropolarimetry with a tunable liquid crystal metasurface

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eLight 2022年第1期2卷 291-300页

作者： Yibo Ni Chen Chen Shun Wen Xinyuan Xue Liqun Sun Yuanmu Yang State Key Laboratory of Precision Measurement Technology and Instruments Department of Precision InstrumentTsinghua UniversityBeijing 100084China

While conventional photodetectors can only measure light intensity,the vectorial light field contains much richer information,including polarization and spectrum,that are essential for numerous applications ranging from imaging to ***,the simultaneous measurement of multi-dimensional light field information typically requires the multiplexing of dispersive or polarization-selective elements,leading to excessive system ***,we demonstrate a near-infrared spectropolarimeter based on an electrically-tunable liquid crystal *** tunable metasurface,which acts as an encoder of the vectorial light field,is tailored to support high-quality-factor guided-mode resonances with diverse and anisotropic spectral features,thus allowing the full Stokes parameters and the spectrum of the incident light to be computationally reconstructed with high *** concept of using a tunable metasurface for multi-dimensional light field encoding may open up new horizons for developing vectorial light field sensors with minimized size,weight,cost,and complexity.

关键词： Tunable metasurface liquid crystal Computational spectropolarimetry