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Nonreciprocal generation of Schrodinger cat state induced by topology

Science China(Physics,Mechanics & Astronomy) 2024年第4期67卷 23-30页

作者： Zi-Hao Li Li-Li Zheng Ying Wu Xin-You Lü School of Physics and Institute for Quantum Science and Engineering Huazhong University of Science and Technologyand Wuhan Institute of Quantum TechnologyWuhan 430074China Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education Jianghan UniversityWuhan 430074China

The Schrodinger cat state produced differently in two directions is anticipated to be a critical quantum resource in quantum information *** exploring the interplay between quantum nonreciprocity and topology in a one-dimensional microcavity array,we obtain the Schrodinger cat state(a pure quantum state)in a chosen direction at the edge cavity,whereas a classical state in the other *** nonreciprocal generation of the cat state originates from the topologically protected chiralitymode excitation in the nontrivial phase,but in the trivial phase,the nonreciprocal generation of cat state ***,our proposal is switchable by tuning the parameters so that a topological phase transition ***,the obtained cat state has nonreciprocal high fidelity,nonclassicality,and quantum coherence,which are sufficient to be used in various one-way quantum technologies,e.g.,invisible quantum sensing,noise-tolerant quantum computing,and chiral quantum *** work provides a general approach to control quantum nonreciprocities with the topological effect,which substantially broadens the fields of nonreciprocal photonics and topological physics.

关键词： Schr?dinger cat state nonreciprocity topology

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N-alkyl chain modification in dithienobenzotriazole unit enabled efficient polymer donor for high-performance non-fullerene solar cells

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Journal of Energy Chemistry 2022年第3期31卷 382-389,I0011页

作者： Jiaxin Xu Hexiang Feng Yuanying Liang Haoran Tang Yixu Tang Zurong Du Zhicheng Hu Fei Huang Yong Cao Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and DevicesSouth China University of TechnologyGuangzhou 510640GuangdongChina

Molecular design of either polymer donors or acceptors is a promising strategy to tune the morphology of the active layer of organic solar cells,enabling a high-performance ***,developing novel polymer donors is an alternative method to obtain high photovoltaic ***,we present a facile side-chain engineering on the dithiophenobenzotriazole(DTBTz)unit of newly-designed polymer donors(named p BDT-DTBTz-EH and p BDT-DTBTz-Me)to boost the performance of non-fullerene solar *** with p BDT-DTBTz-EH with long N-alkyl side chains,p BDT-DTBTz-Me with a short methyl exhibits stronger molecular aggregation,higher absorption coefficient,and preferred face-on orientation *** a consequence,p BDT-DTBTz-Me based devices achieve an optimal power conversion efficiency of 15.31%when donors are paired with the narrow bandgap acceptor Y6,which is superior to that of p BDT-DTBTz-EH based devices(9.17%).Additionally,the p BDT-DTBTz-Me based devices manifest more effective charge separation and transfer than p BDT-DTBTz-EH based *** results indicate that fine-tuning side chains of polymer donors provide new insights for the design of high-performance polymer donors in non-fullerene solar cells.

关键词： Non-fullerene solar cells Wide bandgap polymer donor Side-chain engineering morphology Dithienobenzotriazole

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A Solution-Processed n-Type Conducting Polymer Without Side Chains Formed via Nonmetal-Participated Polymerization and in Situ n-Doping

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CCS Chemistry 2023年第11期5卷 2534-2544页

作者： Haoran Tang Houji Cai Haiyang Zhao Ziyang Liu Ruoxi Tan Fei Huang Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and DevicesSouth China University of Technology(SCUT)Guangzhou 510640

Solution-processed conducting polymers(CPs)are emerging as promising multifunctional materials and are motivating the development of several electronic ***,there are fewer highperformance electron conduction-dominated n-type CPs than ***,the exploration of other material designs and synthesis methods is ***,we developed a facile metal catalystfree method by combining polymerization and in situ n-doping to produce an n-type conducting polymer,poly(benzodithiophenedione)(PBTDO).The doping procedure enabled interaction between the charged conjugated backbones and solvent,dimethyl sulfoxide,making the doped conducting polymer soluble without the assistance of side chains or *** exhibited an extremely low-lying reduction level,moderate conductivity,and good air stability with potential applications in n-type organic thermoelectric ***,it was found that the in situ doping efficiency in the reaction was highly dependent on the energy level and backbone *** cannot occur for polymers with a high lowest unoccupied molecular orbital level and distorted conjugated chains prevent a high doping efficiency from being *** study gains deeper insight into the n-doping mechanisms of conjugated polymers,with guidance for the design of highperformance n-type CPs.

关键词： conducting polymer nonmetalparticipated polymerization n-type in situ doping solution processability solvent interaction

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Stable Electron Spin Pan on Aromatic Oxalic Acid Radical

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Chinese Journal of Chemistry 2024年第18期42卷 2173-2179页

作者： Jiaxing Huang Chenghui Liao Longtian Guan Qiao Meng Sichen Gu Zhicai He Yuan Li State Key Laboratory of Luminescent Materials and Devices Institute of Polymer Optoelectronic Materials and DevicesSouth China University of TechnologyGuangzhouGuangdong 510640China Faculty of Moterlals Science MSU BIT UniversityShenzhenGuangdong 518172.China

The stability of organic radicals in ambient condition is important for their practical *** the development of organic radical chemistry,the electron-withdrawing and steric hindrance groups are usually introduced to improve the stability of radicals via reducing the reactivity of radicals with oxygen in ***,the electron-withdrawing carbonyl groups are introduced to construct a planar aromatic oxalic acid radical(IDF-Og)with two-dimensional electron spin pan ***,IDF-Og exhibited a low optical bandgap of 0.91 eV in film,however,the multiple quinone resonance structures between electron-withdrawing ketone and phenol radicals contribute to the high stability of open-shell radical IDF-Og without protection of large steric hindrance *** the irradiation of 808 nm(1.2 ***^(-2)),IDF-Og reaches 147 c in powder *** work provides an efficient synthesis route for the open-shell electron spin pan system,which is different from the famous fullerene,carbon nanotube and *** electron spin pan can be extended to spin tube or spin sphere system based on the design strategy of aromatic inorganic acid radicals in future.

关键词： Spin Spin pan Open shell Aromatic inorganic acid radicals Aggregation-induced radical

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Secondary electron emission model for photo-emission from metals in the vacuum ultraviolet

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Nuclear Science and Techniques 2022年第8期33卷 89-105页

作者： Ai-Gen Xie Yi-Fan Liu Hong-Jie Dong School of Physics and Optoelectronic Engineering Nanjing University of Information Science&TechnologyNanjing 210044China Jiangsu Key Laboratory for Optoelectronic Detection of Atmosphere and Ocean Nanjing University of Information Science&TechnologyNanjing 210044China Jiangsu International Joint Laboratory on Meteorological Photonics and Optoelectronic Detection Nanjing University of Information Science&TechnologyNanjing 210044China

This study investigates two secondary electron emission(SEE)models for photoelectric energy distribution curves f(E_(ph),hγ),B,E_(mean),absolute quantum efficiency(AQE),and the mean escape depth of photo-emitted electronsλof *** proposed models are developed from the density of states and the theories of photo-emission in the vacuum ultraviolet and SEE,where B is the mean probability that an internal photo-emitted electron escapes into vacuum upon reaching the emission surface of the metal,and E_(mean)is the mean energy of photo-emitted electrons measured from *** formulas for f(E_(ph),hγ),B,λ,E_(mean),and AQE that were obtained were shown to be correct for the cases of Au at hγ=8.1–11.6 eV,Ni at hγ=9.2–11.6 eV,and Cu at hγ=7.7–11.6 *** photoelectric cross sections(PCS)calculated here are analyzed,and it was confirmed that the calculated PCS of the electrons in the conduction band of Au at hγ=8.1–11.6eV,Ni at hγ=9.2–11.6 eV,and Cu at hγ=7.7–11.6 eV are correct.

关键词： Absolute quantum efficiency Photoelectric cross section Mean escape depth of photo-emitted electrons Probability Photo-emission from metals Secondary electron emission Vacuum ultraviolet Mean energy of photo-emitted electrons

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Low sintering shrinkage porous ceramics: Principles, progress, and perspectives

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Journal of Advanced Ceramics 2025年第2期14卷 1-36页

作者： Jie Xu Yueqi Shao Xiaoying Feng Xiaoyan Zhang Hao Li Jinlong Yang Feng Gao State Key Laboratory of Solidification Processing MIIT Key Laboratory of Radiation Detection Materials and DevicesSchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Institute for Advanced Materials and Technology University of Science and Technology BeijingBeijing 100083China State Key Lab of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

Porous ceramics are lightweight materials with diverse pore structures and are widely applied in areas such as thermal insulation, sound absorption, filtration, catalysis, and energy storage. However, excessive shrinkage during the sintering process of porous ceramics leads to cracking and deterioration, posing significant challenges for achieving complex shapes. Despite its importance, the field of low sintering shrinkage porous ceramics has not received sufficient attention. This review systematically discusses the principles and progress in the development of low sintering shrinkage porous ceramics. First, we introduce the characteristics of various preparation methods, including partial sintering, particle-stabilized foaming, gel-casting, foam-gelcasting, and additive manufacturing (AM). We then explain three primary principles of low sintering shrinkage from the perspectives of the volume effect and mass transfer processes. This review focuses on the properties and applications of typical low sintering shrinkage ceramics such as mullite and alumina, particularly their mechanical properties and thermal conductivity as thermal insulation and ceramic cores. Finally, we summarize the current state and present future perspectives on low sintering shrinkage porous ceramics.

关键词： porous ceramics low sintering shrinkage volume expansion mass transfer process pore structure properties

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Spin waves and phase transition on a magnetically frustrated square lattice with long-range interactions

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Frontiers of physics 2023年第3期18卷 71-80页

作者：谭宇婷姚道新 State Key Laboratory of Optoelectronic Materials and Technologies Center for Neutron Science and TechnologyGuangdong Provincial Key Laboratory of Magnetoelectric Physics and DevicesSchool of PhysicsSun Yat-sen UniversityGuangzhou 510275China

We investigate the effects of long-range interactions on the spin wave spectra and the competition between magnetic phases on a frustrated square lattice with large spin *** the spin wave theory and assisted with symmetry analysis,we obtain analytical expressions for spin wave spectra of competing Neel and(π,0)stripe states of systems containing anyorder long-range *** the specific case of long-range interactions with power-law decay,we find surprisingly that the staggered long-range interaction suppresses quantum fluctuation and enlarges the ordered moment,especially in the Neel state,and thus extends its phase boundary to the stripe *** findings illustrate the rich possibilities of the roles of long-range interactions,and advocate future investigations in other magnetic systems with different structures of interactions.

关键词： spin wave phase transition frustration square lattice long-range interaction antiferromagnet

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Highly-Sensitive Polymer Optical Fiber SPR Sensor for Fast Immunoassay

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Photonic Sensors 2024年第4期14卷 20-30页

作者： Ying WANG Xing RAO Xun WU George Y.CHEN Changrui LIAO Mateusz Jakub SMIETANA Yiping WANG Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education/Guangdong Province College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China Shenzhen Key Laboratory of Photonic Devices and Sensing Systems for Internet of Things Guangdong and Hong Kong Joint Research Centre for Optical Fibre SensorsShenzhen UniversityShenzhen 518060China Division of Microsystem&Electronic Materials Technology Institute of Microelectronics&OptoelectronicsWarsaw University of TechnologyKoszykowa 7500-662 WarsawPoland

A new type of human immunoglobulin G(IgG)sensors based on the surface plasmon resonance(SPR)in the low refractive index(RI)plastic optical fiber(POF)and an antibody immobilization method is presented.A 50-nm-thick gold film was formed on the polished D-shaped fiber surface by magnetron *** RI response of the POF sensor is 30049.61 nm/RIU,which is 26.5 times higher than that of single mode fiber(SMF)SPR *** proposed SPR biosensor can be developed by simple and rapid modification of the gold film with 11-mercapto undecanoic acid(MUA).Upon immobilization of the goat anti-human IgG antibody,the resonance wavelength shifts by 11.2 *** sensor can be used to specifically detect and quantify the human IgG at concentrations down to 245.4 ng/mL with the sensitivity of 1.3277 nm perμg/mL,which offers an enhancement of 12.5-fold compared to that of the conventional SMF based SPR *** proposed device may find the potential applications in the case of use at the point of care.

关键词： Optical fiber biosensor surface plasmon resonance antibody immobilization side-polished fiber plastic optical fiber

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Raman Spectroscopy Enhancement Based on Deep Learning 17

Raman Spectroscopy Enhancement Based on Deep Learning

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17th International Conference on Photonics and Imaging in Biology and Medicine, PIBM 2024

作者： Qiao, Wei Li, Cong Gao, Xingen Jiang, Huali Zhang, Hongyi Lin, Juqiang School of Optoelectronic and Communication Engineering Xiamen University of Technology Xiamen361024 China Fujian Provincial Key Laboratory of Optoelectronic Technology and Devices Xiamen University of Technology Xiamen361024 China

ISBN: (数字)9781510688070

ISBN: (纸本)9781510688063

Raman spectroscopy is an important analytical tool, but the weak intensity of Raman signals caused by Stokes shifts limits its practical applications. To enhance Raman signals, techniques such as Surface-Enhanced Raman Spectroscopy (SERS) and Stimulated Raman Scattering (SRS) are commonly used, but these methods rely on external enhancement agents and complex equipment. In this study, we propose a novel deep learning-based method that can directly enhance Raman signals without dependence on external agents or complicated setups. Experimental validation using Rhodamine 6G and Crystal Violet demonstrated significant signal enhancement. To verify the accuracy of the enhancement, we calculated the root mean square error (RMSE) and normalized mean square error (NMSE) for Rhodamine 6G, which were 534.2 and 0.21%, respectively, achieving a 209.1-fold signal enhancement. This approach demonstrates potential for directly amplifying weak Raman signals, offering new insights for advancing Raman spectroscopy applications across various fields. © 2025 SPIE.

关键词： Stimulated Raman scattering

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Co-electrolysis of ethylene glycol and carbon dioxide for formate synthesis

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Science China Chemistry 2024年第5期67卷 1539-1544页

作者： Dongfeng Du Fusong Kang Shiru Yang Bin Shao Jingshan Luo Institute of Photoelectronic Thin Film Devices and Technology State Key Laboratory of Photovoltaic Materials and CellsKey Laboratory of Photoelectronic Thin Film Devices and Technology of TianjinMinistry of Education Engineering Research Center of Thin Film Photoelectronic TechnologyNankai UniversityTianjin 300350China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China Frontiers Science Center for New Organic Matter Nankai UniversityTianjin 300071China College of Electronic Information and Optical Engineering Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network TechnologyNankai UniversityTianjin 300350China

Co-electrolysis of waste plastics and carbon dioxide(CO_(2)) into value-added chemicals or fuels is a promising pathway for a sustainable society, but efficient and selective conversion remains a challenge. Herein, a gold-mediated nickel hydroxide(Au/Ni(OH)_(2)) is developed to oxidize waste plastic-derived ethylene glycol(EG) into formate. In-situ electrochemical experiments and theoretical results reveal that the introduction of Au favors the redox properties and EG adsorption behavior of Ni(OH)_(2). The Au/Ni(OH)_(2) catalyst shows an excellent formate selectivity of >90% at high current densities of above 100 m A cm^(-2). When coupled with sputtered bismuth(Bi) cathode for CO_(2) reduction, a high formate Faradic efficiency(FE) of 188.2% at 200 m A cm^(-2)and a good formate productivity of 7.33 mmol m^(-2)s^(-1)at 10 A are obtained in a flow cell and a zero-gap membrane electrode assembly(MEA) cell, respectively. This work demonstrates a promising strategy to convert waste plastics and CO_(2) into valuable products.

关键词： waste plastic upcycling ethylene glycol oxidation carbon dioxide reduction electrocatalysis formate synthesis

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