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Photonics Research 2022年第4期10卷 877-885页

作者： Ata Ur Rahman Khalid Fu FENG Naeem Ullah Xiaocong Yuan Michael Geoffrey Somekh Nanophotonics Research Center Shenzhen Key Laboratory of Micro-Scale Optical Information Technology&Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China Beijing Engineering Research Center for Mixed Reality and Advanced Display School of Optics and PhotonicsBeijing Institute of TechnologyBeijing 100081China Faculty of Engineering University of NottinghamNottingham NG72RDUK

Metasurfaces have drawn considerable attention in manipulation of electromagnetic waves due to their exotic subwavelength footprints. Regardless of immense progress of polarization-dependent flat optics, the realization of on-device switchable complete phase multiplication is still missing from design multifunctional devices. Here,by combining geometric and propagation phases, a generalized design principle is proposed that can achieve switchable integer or fractional multiple complete phase modulation in transmitted circularly cross-polarized light by switching the handedness of incident polarization. As a proof of concept, two types of spin-dependent bifunctional wavefront manipulating devices, including switchable beam splitter/beam deflector and spinto-orbital angular momentum converter designs are numerically realized. It is believed that the proposed single-cell spin-switchable rational-multiple complete-phase-modulation design principle based on combined propagation and geometric phases has great potential to underpin the development of meta-optics-based multifunctional operations in the field of integrated optics, imaging, and optical communication.

关键词： polarization phase rational

Surface modification of ZnIn2S4 layers to realize energy-transfer-mediated photocatalysis

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National Science Review 2022年第10期9卷 120-125页

作者： Xianshun Sun Xiao Luo Sen Jin Xiaodong Zhang Hui Wang Wei Shao Xiaojun Wu Yi Xie Hefei National Laboratory for Physical Sciences at the microscale University of Science and Technology of China institute of Energy Hefei Comprehensive National Science Center

Photocatalytic selective aerobic oxidation reactions are crucial in designing advanced organic intermediates,but suffer from low conversion efficiency.Hence,activating1O2to create suitable reactive oxygen species,such as singlet oxygen(1O2),can significantly increase the yield of desired products.Herein,using ZnIn2S4nanosheets as a model system,we build a surface-modified theoretical structure,where a surface-covered non-conductive macromolecular chain,polyvinyl pyrrolidone(PVP),is bound to ZnIn2S4and influences the O2adsorption process.PVP on the surface significantly changes the electronic structure and suppresses electron conduction of ZnIn2S4nanosheets.Therefore,abundantly photogenerated and long-lived species transfer their energy to physically absorbed O2to efficiently generate1O2,which can oxidize sulphides into their corresponding sulphoxides.For sulphoxidation of different sulphides,surface modification brings a3-9-fold increase in conversion efficiency and high selectivities> 9 8 %.This study provides a feasible way of boosting1O2-generation-related photocatalytic reactions.

关键词： surface modification long-lived species energy transfer singlet oxygen photocatalytic sulphoxidation of sulphides

Achieving Tunable Cold/Warm White‑Light Emission in a Single Perovskite Material with Near‑Unity Photoluminescence Quantum Yield

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纳微快报:英文版 2023年第11期15卷 305-316页

作者： Bo Zhou Aixuan Du Dong Ding Zexiang Liu Ye Wang Haizhe Zhong Henan Li Hanlin Hu Yumeng Shi International Collaborative Laboratory of 2D Materials for optoelectronics Science and Technology of Ministry of Education Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060People’s Republic of China Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing Yantai 264006People’s Republic of China Key Laboratory of Material Physics School of Physics and MicroelectronicsZhengzhou UniversityMinistry of EducationZhengzhou 450052People’s Republic of China School of Electronics and Information Engineering Shenzhen UniversityShenzhen 518060People’s Republic of China Hoffmann institute of Advanced Materials Shenzhen PolytechnicShenzhen 518060People’s Republic of China

Single materials that exhibit efficient and stable white-light emission are highly desirable for lighting applications.This paper reports a novel zero-dimensional perovskite,Rb_(4)CdCl_(6):Sn^(2+),Mn^(2+),which demonstrates exceptional white-light properties including adjustable correlated color temperature,high color rendering index of up to 85,and near-unity photoluminescence quantum yield of 99%.Using a co-doping strategy involving Sn^(2+)and Mn^(2+),cyan-orange dual-band emission with complementary spectral ranges is activated by the self-trapped excitons and d-d transitions of the Sn^(2+)and Mn^(2+)centers in the Rb_(4)CdCl_(6)host,respectively.Intriguingly,although Mn^(2+)ions doped in Rb_(4)CdCl_(6)are difficult to excite,efficient Mn^(2+)emission can be realized through an ultra-high-efficient energy transfer between Sn^(2+)and Mn^(2+)via the formation of adjacent exchange-coupled Sn–Mn pairs.Benefiting from this efficient Dexter energy transfer process,the dual emission shares the same optimal excitation wavelengths of the Sn^(2+)centers and suppresses the non-radiative vibration relaxation significantly.Moreover,the relative intensities of the dual-emission components can be modulated flexibly by adjusting the fraction of the Sn^(2+)ions to the Sn–Mn pairs.This co-doping approach involving short-range energy transfer represents a promising avenue for achieving high-quality white light within a single material.

关键词： 0D perovskite Multi-ion doping Near-unity white light Energy transfer Self-trapped excitons

Cylindrical vector beam multiplexer/demultiplexer using off-axis polarization control

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Light(Science & Applications) 2021年第12期10卷 2360-2368页

作者： Shuqing Chen Zhiqiang Xie Huapeng Ye Xinrou Wang Zhenghao Guo Yanliang He Ying Li Xiaocong Yuan Dianyuan Fan institute of microscale optoelectronics Shenzhen University518060 ShenzhenChina Guangdong Provincial Key Laboratory of Optical Information Materials and Technology&institute of Electronic Paper Displays South China Academy of Advanced OptoelectronicsSouth China Normal University510006 GuangzhouChina

The emergence of cylindrical vector beam(CVB)multiplexing has opened new avenues for high-capacity optical communication.Although several configurations have been developed to couple/separate CVBs,the CVB multiplexer/demultiplexer remains elusive due to lack of effective off-axis polarization control technologies.Here we report a straightforward approach to realize off-axis polarization control for CVB multiplexing/demultiplexing based on a metal–dielectric–metal metasurface.We show that the left-and right-handed circularly polarized(LHCP/RHCP)components of CVBs are independently modulated via spin-to-orbit interactions by the properly designed metasurface,and then simultaneously multiplexed and demultiplexed due to the reversibility of light path and the conservation of vector mode.We also show that the proposed multiplexers/demultiplexers are broadband(from 1310 to 1625 nm)and compatible with wavelength-division-multiplexing.As a proof of concept,we successfully demonstrate a four-channel CVB multiplexing communication,combining wavelength-division-multiplexing and polarization-division-multiplexing with a transmission rate of 1.56 Tbit/s and a bit-error-rate of 10^(−6) at the receive power of−21.6 dBm.This study paves the way for CVB multiplexing/demultiplexing and may benefit high-capacity CVB communication.

关键词： polarization beam properly

具有超低开关电场的可控的易失性至非易失性单晶无铅双钙钛矿忆阻器

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Science China Materials 2023年第1期66卷 241-248页

作者：游琪黄富房菲儿祝家齐郑越方绍帆周勃李贺楠韩成时玉萌 International Collaborative Laboratory of 2D Materials for optoelectronics Science and Technology of Ministry of Education Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China College of Electronics and Information Engineering Shenzhen UniversityShenzhen 518060China

全无机无铅双钙钛矿由于其优异的电子传输能力、高光敏性、低毒性和环境稳定性,为电子/光电存储器件提供了潜在的材料.然而,钙钛矿薄膜的多晶性质严重限制了器件性能.在此,我们展示了一种基于单晶双钙钛矿Cs_(2)AgBiBr_(6)的高性能忆阻... 详细信息

全无机无铅双钙钛矿由于其优异的电子传输能力、高光敏性、低毒性和环境稳定性,为电子/光电存储器件提供了潜在的材料.然而,钙钛矿薄膜的多晶性质严重限制了器件性能.在此,我们展示了一种基于单晶双钙钛矿Cs_(2)AgBiBr_(6)的高性能忆阻器,其具有6.67×10^(4)V m^(-1)的超低开关电场和10^(7)的高电流开/关比.值得注意的是,Cs_(2)AgBiBr_(6)的电阻开关行为与单晶钙钛矿的厚度相关,当单晶厚度从100到800 nm变化时,忆阻器从易失性的阈值开关行为演变为非易失性的忆阻开关行为.元素分析表明,Cs_(2)AgBiBr_(6)中导电通道的形成与具有低活化能Br空位的迁移有关.此外,形成的导电通道可以被具有不同波长和强度的光照湮灭,从而实现具有单独的电写入和光擦除的光电存储器.我们的研究结果为单晶钙钛矿中的离子迁移提供了深刻的见解,并为其在未来的电子和光电存储器中的应用提供了理论基础.

关键词：非易失性存储器忆阻器环境稳定性电子传输导电通道电阻开关离子迁移

Three-dimensional CeO_(2)@carbon-quantum-dots scaffold modified with Au nanoparticles on flexible substrates for high performance gas sensing at room temperature

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Rare Metals 2023年第6期42卷 1946-1958页

作者： Chao Wang Long Zhang Bing He Quan Zhou Shao-Hui Zhang Xiu-Li Kong Zhen Chen Ge-Bo Pan School of Chemistry and Pharmaceutical Engineering Shandong First Medical University and Shandong Academy of Medical SciencesTai’an 271016China Division of Interdisciplinary and Comprehensive Research Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou215123China School of Electrical and Electronic Engineering Nanyang Technological UniversitySingapore639798Singapore institute of microscale optoelectronics Shenzhen UniversityShenzhen518060China

High-performance gas sensing materials operated at room temperature(RT) are attractive for a variety of real-time gas monitoring applications,especially with the excellent durability and flexibility of wearable sensor.The constructing heterostructure is one of the significant approaches in design strategies of sensing materials.This heterostructure effectively increases the active site for improving sensing performance and decreasing energy consumption.Herein,the heterostructure of Au nanoparticles modified CeO_(2)@carbon-quantum-dots(Au/CeO_(2)@CQDs) with a three-dimensional(3D) scaffold structure are successfully synthesized by an effective strategy,which can apply for preparing flexible gas sensor.The gas sensing properties of Au/CeO_(2)@CQDs based on flexible substrate are obtained under long-term repeated NO_(2) exposure at RT.Meanwhile,the long-term mechanical stability of this gas sensing device is also detected after different bending cycles.The Au/CeO_(2)@CQDs based on flexible substrate sensor exhibits excellent performance,including higher sensitivity(47.2),faster response(18 s)and recovery time(22 s) as well as longer-term stability than performance of pure materials.The obtained sensor also reveals outstanding mechanical flexibility,which is only a tiny response fluctuation(8.1%) after 500 bending/relaxing cycles.Therefore,our study demonstrates the enormous potential of this sensing materials for hazardous gas monitoring in future portable and wearable sensing platform.

关键词： Au/CeO_(2)@CQDs heterostructure Threedimensional(3D)scaffold structure High performance gas sensor Flexible sensing platform Photodeposition

3D Artificial Array Interface Engineering Enabling Dendrite-Free Stable Zn Metal Anode

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Nano-Micro Letters 2023年第3期15卷 112-128页

作者： Jianbin Ruan Dingtao Ma Kefeng Ouyang Sicheng Shen Ming Yang Yanyi Wang Jinlai Zhao Hongwei Mi Peixin Zhang College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060People’s Republic of China institute of microscale optoelectronics Shenzhen UniversityShenzhen 518060People’s Republic of China College of of Materials Science and Engineering Shenzhen UniversityShenzhen 518060People’s Republic of China Guangdong Flexible Wearable Energy and Tools Engineering Technology Research Center Shenzhen 518060People’s Republic of China

The ripple effect induced by uncontrollable Zn deposition is considered as the Achilles heel for developing high-performance aqueous Zn-ion batteries.For this problem,this work reports a design concept of 3D artificial array interface engineering to achieve volume stress elimination,preferred orientation growth and dendrite-free stable Zn metal anode.The mechanism of MXene array interface on modulating the growth kinetics and deposition behavior of Zn atoms were firstly disclosed on the multi-scale level,including the in-situ optical microscopy and transient simulation at the mesoscopic scale,in-situ Raman spectroscopy and in-situ X-ray diffraction at the microscopic scale,as well as density functional theory calculation at the atomic scale.As indicated by the electrochemical performance tests,such engineered electrode exhibits the comprehensive enhancements not only in the resistance of corrosion and hydrogen evolution,but also the rate capability and cyclic stability.High-rate performance(20 mA cm^(-2))and durable cycle lifespan(1350 h at 0.5 mA cm^(-2),1500 h at 1 mA cm^(-2)and 800 h at 5 mA cm^(-2))can be realized.Moreover,the improvement of rate capability(214.1 mAh g^(-1)obtained at 10 A g^(-1))and cyclic stability also can be demonstrated in the case of 3D MXene array@Zn/VO2battery.Beyond the previous 2D closed interface engineering,this research offers a unique 3D open array interface engineering to stabilize Zn metal anode,the controllable Zn deposition mechanism revealed is also expected to deepen the fundamental of rechargeable batteries including but not limited to aqueous Zn metal batteries.

关键词： Aqueous Zn-ion batteries Volume stress 3D artificial array interface Controllable deposition Zn metal anode

Bandgap tunable preparation of GaS nanosheets and their application in photoelectrochemical photodetectors

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Science China(Technological Sciences) 2022年第10期65卷 2297-2303页

作者： YOU Qi ZHU JiaQi PENG Chao ZHANG YanHui RUAN BanXian DAI XiaoYu WANG Xin WONG Wai-Yeung XUE DongFeng XIANG YuanJiang institute of microscale optoelectronics(IMO) Shenzhen UniversityShenzhen 518060China Shenzhen institute of Advanced Technology Chinese Academy of SciencesShenzhen 518055China School of Physics and Electronics Central South UniversityChangsha 410083China School of Physics and Electronics Hunan UniversityChangsha 410082China Department of Applied Biology and Chemical Technology The Hong Kong Polytechnic UniversityHong KongChina

Bandgap engineering of two-dimensional(2D)materials is essential for the design of photoelectrochemical(PEC)devices.Gallium(II)sulfide(GaS),a layered semiconductor material with a direct bandgap of approximately 3.05 eV,has recently gained extensive attention owing to its unique photoresponse property.However,its bandgap tunability relative to the number of layers has not been experimentally confirmed;thus,the effect of bandgap on the photoresponse has not been explored yet.Herein,fewlayered GaS nanosheets(Ns)are prepared using a simple liquid-phase exfoliation(LPE)approach.After centrifuging at different speeds,GaS Ns with defined layers are obtained,which enable verification of the tunable bandgap from 2.02 to 3.15 eV.When applied as a PEC-type photodetector,the responsivity of the photodetector is 4.77 mA W^(−1)and 33.7μA W^(−1)under bias voltages of 0.6 and 0 V,respectively.Theoretical models of the electronic structure suggest that a reduction in the number of layers,leading to a decrease of the effective mass at the valence band maximum(VBM),can enhance the carrier mobility of GaS Ns.This results in high photocurrents and indicates that 2D GaS Ns are ideal materials for future high-performance optoelectronic systems.

关键词： two-dimensional materials gallium sulfide nanosheets bandgap engineering photodetector

Realizing the potential of exploiting human IPSCs and their derivatives in research of Down syndrome

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BIOCELL 2023年第12期47卷 2567-2578页

作者： YAFEI WANG JIELEI NI YUHAN LIU DINGYING LIAO QIANWEN ZHOU XIAOYANG JI GANG NIU YANXIANG NI Nanophotonics Research Center Institute of Microscale Optoelectronics&State Key Laboratory of Radio Frequency Heterogeneous IntegrationShenzhen UniversityShenzhen518060China Phil Rivers Technology Beijing100871China Department of Ophthalmology Peking University Shenzhen HospitalShenzhen518036China

Down syndrome(DS)is a genetic condition characterized by intellectual disability,delayed brain development,and early onset Alzheimer’s disease.The use of primary neural cells and tissues is important for understanding this disease,but there are ethical and practical issues,including availability from patients and experimental manipulability.Moreover,there are significant genetic and physiological differences between animal models and humans,which limits the translation of the findings in animal studies to humans.Advancements in induced pluripotent stem cells(iPSC)technology have revolutionized DS research by providing a valuable tool for studying the cellular and molecular pathologies associated with DS.Induced pluripotent stem cells derived from cells obtained from DS patients contain the patient’s entire genome including trisomy 21.Trisomic iPSCs as well as their derived cells or organoids can be useful for disease modeling,investigating the molecular mechanisms,and developing potential strategies for treating or alleviating DS.In this review,we focus on the use of iPSCs and their derivatives obtained from DS individuals and healthy humans for DS research.We summarize the findings from the past decade of DS studies using iPSCs and their derivatives.We also discuss studies using iPSC technology to investigate DS-associated genes(e.g.,APP,OLIG1,OLIG2,RUNX1,and DYRK1A)and abnormal phenotypes(e.g.,dysregulated mitochondria and leukemia risk).Lastly,we review the different strategies for mitigating the limitations of iPSCs and their derivatives,for alleviating the phenotypes,and for developing therapies.

关键词： Down syndrome Induced pluripotent stem cell Trisomy 21 Neurodevelopment Genetic alterations Alzheimer’s disease

Single-shot three-input phase retrieval for quantitative back focal plane measurement

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Photonics Research 2022年第2期10卷 491-502页

作者： Mengqi Shen Qi Zou Xiaoping Jiang Fu Feng Michael G.Somekh Nanophotonics Research Center Shenzhen Key Laboratory of Micro-Scale Optical Information Technology&Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China Department of Electronics and Information Engineering The Hong Kong Polytechnic UniversityHung HornHong KongChina Faculty of Engineering University of NottinghamNottingham NG72RDUK

This paper presents quantitative measurements facilitated with a new optical system that implements a single-shot three-input phase retrieval algorithm. The new system allows simultaneous acquisition of three distinct input patterns, thus eliminating the requirement for mechanical movement and reducing any registration errors and microphonics. We demonstrate the application of the system for measurement and separation of two distinct attenuation measurements of surface waves, namely, absorption and coupling loss. This is achieved by retrieving the phase in the back focal plane and performing a series of virtual optics computations. This overcomes the need to use a complicated series of hardware manipulations with a spatial light modulator. This gives a far more accurate and faster measurement with a simpler optical system. We also demonstrate that phase measurements allow us to implement different measurement methods to acquire the excitation angle for surface plasmons. Depending on the noise statistics different methods have superior performance, so the best method under particular conditions can be selected. Since the measurements are only weakly correlated, they may also be combined for improved noise performance. The results presented here offer a template for a wider class of measurements in the back focal plane including ellipsometry.

关键词： plane phase overcome