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Multi-scale design and optimization for solid-lattice hybrid structures and their application to aerospace vehicle components

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Chinese Journal of Aeronautics 2021年第5期34卷 386-398页

作者： Chuang WANG Jihong ZHU Manqiao WU Jie HOU Han ZHOU Lu MENG Chenyang LI Weihong ZHANG State IJR Center of Aerospace Design and Additive Manufacturing Northwestern Polytechnical UniversityXi'an 710072China MIIT Lab of Metal Additive Manufacturing and Innovative Design Northwestern Polytechnical UniversityXi'an 710072China Science and Technology on Space Physics Laboratory China Academy of Launch Vehicle TechnologyBeijing 100076China

By integrating topology optimization and lattice-based optimization,a novel multi-scale design method is proposed to create solid-lattice hybrid structures and thus to improve the mechanical performance as well as reduce the structural *** achieve this purpose,a two-step procedure is developed to design and optimize the innovative ***,the classical topology optimization is utilized to find the optimal material layout and primary load carrying ***,the solid-lattice hybrid structures are reconstructed using the finite element mesh based modeling *** lattice-based optimization is performed to obtain the optimal crosssection area of the lattice ***,two typical aerospace structures are optimized to demonstrate the effectiveness of the proposed optimization *** numerical results are quite encouraging since the solid-lattice hybrid structures obtained by the presented approach show remarkably improved performance when compared with traditional designs.

关键词： Aerospace vehicle components Lattice-based optimization Multi-scale Solid-lattice hybrid structure Topology optimization

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White-light-driven fluorescence switch for super-resolution imaging guided photodynamic and photoacid therapy

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science China Chemistry 2022年第12期65卷 2528-2537页

作者： Hao Chen Kaikai Wen Yu Lu Xin Zhang Yuhao Shi Qinqin Shi Han Ma Qian Peng Hui Huang College of Materials Science and Opto-Electronic Technology&Center of Materials Science and Optoelectronics Engineering&CAS Center for Excellence in Topological Quantum Computation&CAS Key Laboratory of Vacuum Physics University of Chinese Academy of SciencesBeijing100049China Department of Neurosurgery and Health Science Center Shenzhen Second People’s HospitalThe First Affiliated HospitalShenzhen UniversityShenzhen518035China School of Chemical Sciences University of Chinese Academy of SciencesBeijing100049China Department of Dermatology&Guangdong Provincial Key Laboratory of Biomedical Imaging The Fifth Affiliated Hospital Sun Yat-sen UniversityZhuhai519000China

Photocaged fluorophores with photoactivatable characteristics presented important applications in imaging the biological structures and *** advantage of their super-resolution imaging merits to manipulate and visualize anti-cancer treatment is always a goal of modern clinical *** photodynamic therapy(PDT) is a noninvasive treatment but limited in intracellular oxygen *** I PDT and photoacid therapy(PAT) are two effective supplements of traditional PDT especially in hypoxic ***,a novel white-light-driven fluorescence switch(7H-dibenzo[c,g]carbazol-7-yl)(2-iodophenyl)methanone(2IB) was designed and synthesized as an unprecedent “all in one” platform for stochastic optical reconstruction microscopy(STORM) imaging guided Type Ⅰ/Ⅱ PDT and *** experimental and theoretical studies revealed that the working mechanism is based on two competing paths under excitation:photosensitization and photocyclization *** intersystem crossing(ISC) ensured the generation of reactive oxygen species(ROS) for PDT,while low energy barrier facilitated the photocyclization reaction that simultaneously yielded emissive fluorophores(2IBC) and H^(+) for super-resolution imaging and photoacid,***,the fluorescent intensity of mitochondria-targeted 2IBC was positively correlated with treatment efficacy,which is beneficial to spatiotemporally visualized therapeutic process and *** a result,superior anti-tumor performance was achieved in vitro and in *** contribution provided a multifunctional nanodrug paradigm for multimode cancer diagnosis and treatment.

关键词： photocaged fluorophores super-resolution imaging type I/II photodynamic therapy photoacid therapy outcome self-report

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Investigation of the Superposed Effects of Cosmic Ray Diurnalanisotropy on the Giant Gound Level Enhancement of 29 September1989 (Gle 42)

SSRN

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SSRN 2024年

作者： Ugwoke, Romanus Ejike Okike, Ogbonnaya Alhassan, Jibrin A. Ugwu, Chukwuebuka J. Eya, Innocent O. Ugwoke, R.E. Astrophysics and Astronomy Research Lab. Department of Physics and Astronomy Faculty of Physics Sciences University Nigeria Nsukka Nigeria Department of Industrial Physics Ebonyi State University Abakaliki Nigeria Department of Physics Federal University of Technology Owerii Imo State Nigeria Department of Science Laboratory Technology University of Nigeria Nsukka Nigeria

We present the result of the investigation of the effects of diurnal anisotropy (DA) on the giantground level enhancement (GLE) of cosmic rays on 29, September, 1989 (GLE 42). Cosmic rays(CRs) are extra-terrestrial high energy charged particles that attain relativistic speed. DA is thevariation in the intensity of cosmic rays due to the twenty-four hour rotation of the Earth on itsaxis and the change in the direction of viewing of the neutron monitors. The GLE is ranked asthe third largest based on the percentage intensity. Its event-integrated intensity is higher thanthat of the second-largest GLE. Most investigations involving GLE did not account for the DAsuperposed on the raw data. DA superimposed on cosmic ray data is known to mask some ofthe features of the CR profile. In this submission, we have disentangled the superimposed effectsof CR DA on the GLE 42 by applying the Fast Fourier Transformation technique to the rawdata of 29 neutron monitor stations spread across all latitudes. Our investigation shows thatthe effects of DA on the events are present in all neutron monitor data. The effects are at theonset in all the NMs, the peak at some of them and the decay phase in most of them. The DAtends to cause a delay in the peak and decay phase of the GLE. For every station, removal ofthe DA shows that the onset of all GLE commences at the recovery phase of a Forbush *** magnitude of the GLE is increased by the DA irrespective of the location of the NM. Ourresults also suggest that neutron monitors at close latitude tend to record similar effect of DAthan those at close longitude. © 2024, The Authors. All rights reserved.

关键词： Cosmic rays

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Design of an ultracompact 3-input majority gate using photonic crystal

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ISSS Journal of Micro and Smart Systems 2023年第2期12卷 117-126页

作者： Swarnakar, Sandip Rakesh, Naddi Venkata Kumar, Katta Bhavan Yashwanth, Kuruva Chavadi Saikiran, Yerravalli Muduli, Arjuna Kumar, Santosh Photonics Lab Department of Electronics and Communication Engineering G Pullaiah College of Engineering and Technology Kurnool India Department of Electronics and Communication Engineering Koneru Lakshmaiah Education Foundation Vaddeswaram Guntur India Shandong Key Laboratory of Optical Communication Science and Technology School of Physics Science and Information Technology Liaocheng University Liaocheng China

In this study, a three-input majority gate based on a 2-D photonic crystal is designed and simulated. In this work, a novel majority gate construction with a high contrast ratio of 11.68 dB is designed using photonic crystals. The design is verified and analyzed using finite-difference time-domain method. This design has been computed and simulated numerous times in this work, but with different lattice constants, refractive indices, and silicon rod radii to get an optimized performance of the design. The designed model operates at a wavelength of 1550 nm. Furthermore, bit rate of 34.64 Tbps, transmission efficiency of 102%, insertion loss of 0.086 dB, and response time of 28.87 fs are achieved. The majority gate is also used in full adder computations that only carry outputs.

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Spontaneous Symmetry Breaking of Cavity vacuum and Emergent Gyrotropic Effects in Embedded moiré Superlattices

arXiv

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arXiv 2025年

作者： Lin, Zuzhang Chan, Hsun-Chi Yang, Wenqi Sha, Yixin Xiao, Cong Zhang, Shuang Yao, Wang New Cornerstone Science Lab Department of Physics The University of Hong Kong Hong Kong HK Institute of Quantum Science & Technology University of Hong Kong Hong Kong Institute of Applied Physics and Materials Engineering University of Macau Taipa China

In an electronic system, spontaneous symmetry breaking can arise from many-body interaction between electrons, leading to degenerate ground states distinguishable by emergent effects otherwise prohibited by the symmetry. Here we show that ultrastrong coupling of a mesoscopic electronic system to the vacuum of a cavity resonator can lead to another paradigm of spontaneous breaking of spatial symmetries in both systems. As a pertinent example, we consider the orbital gyrotropic effects in a moiré superlattice embedded in a THz split ring cavity resonator. Our mean-field and exact diagonalization calculations consistently demonstrate a spontaneous parity symmetry breaking in both the electronic ground state and the cavity vacuum, leading to two degenerate hybrid ground states distinguished by their opposite orbital gyrotropic Hall and magnetic effects. These sizable responses in the cavity-embedded moiré superlattice are highly tunable by both the cavity field polarization and interlayer bias on the moiré superlattice, providing an advanced platform for manipulating gyrotropic effects. Copyright © 2025, The Authors. All rights reserved.

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可同时增强驱动应力和应变的近红外光驱动液晶弹性体

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science China Materials 2023年第12期66卷 4803-4813页

作者：张煜晗宋晨捷保金映李昭中王子正肖久梅于美娜高延子张兰英兰若尘邹呈杨槐 Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China School of Materials Science and Engineering Peking UniversityBeijing 100871China Key Laboratory of Polymer Chemistry and Physics of Ministry of Education Peking UniversityBeijing 100871China School of Mathematics and Physics University of Science and Technology BeijingBeijing 100083China Institute of Advanced Materials and Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education Jiangxi Normal UniversityNanchang 330022China Eye Institute and School of Optometry Tianjin Medical University Eye HospitalTianjin 300384China

液晶弹性体(LCEs)在先进软执行器和机器人的应用中引起了广泛关注.具有高驱动应力和驱动应变的新兴LCEs始终是实际应用的理想选择.然而,一个常识是,LCEs特定机械性能的改善必须以牺牲其他性能为代价.在本工作中,通过简单的硫醇-丙烯酸... 详细信息

液晶弹性体(LCEs)在先进软执行器和机器人的应用中引起了广泛关注.具有高驱动应力和驱动应变的新兴LCEs始终是实际应用的理想选择.然而,一个常识是,LCEs特定机械性能的改善必须以牺牲其他性能为代价.在本工作中,通过简单的硫醇-丙烯酸酯反应制备了LCE,随后进行光引发的自由基聚合.通过调节侧链液晶(LC)基元的含量,调控了液晶网络的交联密度,优化了LCE的驱动.侧链LC基元的引入降低了驱动温度并且提高了驱动应变,而丙烯酸酯官能化的MXene纳米片交联了LCE基体,确保了高驱动应力和光热转化.因此,本工作通过引入侧链基元和MXene纳米片作为交联剂,同时增强了LCE的驱动应力和驱动应变,克服了LCE致动器以往高温或有害紫外光驱动、物理掺杂引起的分子扰动等局限性,大大提高了整体驱动性能(驱动应力为0.773 MPa,驱动应变为45%),实现了近红外光下的可逆变形(54%).该策略可能为优化LCE执行器的性能提供一条新途径.

关键词： liquid crystalline elastomers(LCEs) actuation stress actuation strain near-infrared light actuation

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Giant Domain Wall Anomalous Hall Effect in a Layered Antiferromagnet EuAl2Si2

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Physical Review Letters 2024年第21期133卷 216602-216602页

作者： Wei Xia Bo Bai Xuejiao Chen Yichen Yang Yang Zhang Jian Yuan Qiang Li Kunya Yang Xiangqi Liu School of Physical Science and Technology ShanghaiTech University Shanghai 201210 China ShanghaiTech Laboratory for Topological Physics ShanghaiTech University Shanghai 201210 China CAS Key Laboratory of Magnetic Materials and Devices Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 China State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai 200050 China State Key Laboratory of Surface Physics Department of Physics Fudan University Shanghai 200433 China Low Temperature Physics Lab College of Physics Center of Quantum Materials and Devices Chongqing University Chongqing 401331 China

Generally, the dissipationless Hall effect in solids requires time-reversal symmetry breaking (TRSB), where TRSB induced by external magnetic field results in the ordinary Hall effect, while TRSB caused by spontaneous magnetization gives rise to the anomalous Hall effect (AHE) which scales with the net magnetization. The AHE is therefore not expected in antiferromagnets with vanishing small magnetization. However, large AHE was recently observed in certain antiferromagnets with noncollinear spin structure and nonvanishing Berry curvature. Here, we report another origin of AHE in a layered antiferromagnet EuAl2Si2, namely, the domain wall (DW) skew scattering with Weyl points near the Fermi level, in experiments for the first time. Interestingly, the DWs form a unique periodic stripe structure with controllable periodicity by external magnetic field, which decreases nearly monotonically from 975 nm at 0 T to 232 nm at 4 T. Electrons incident on DW with topological bound states experience strong asymmetric scattering, leading to a giant AHE, with the DW Hall conductivity (DWHC) at 2 K and 1.2 T reaching a record value of ∼1.51×104 Scm−1 among bulk systems and being 2 orders of magnitude larger than the intrinsic anomalous Hall conductivity. The observation not only sets a new paradigm for exploration of large anomalous Hall effect, but also provides potential applications in spintronic devices.

关键词： Magnetotransport Topological materials

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Enhanced quantum sensing in time-modulated non-Hermitian systems

arXiv

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arXiv 2025年

作者： Wu, Qi-Cheng Zhou, Yan-Hui Liu, Tong Kang, Yi-Hao Su, Qi-Ping Yang, Chui-Ping Zhou, Zheng-Wei Quantum Information Research Center Jiangxi Province Key Laboratory of Applied Optical Technology Shangrao Normal University Shangrao334001 China School of Physics Hangzhou Normal University Hangzhou311121 China CAS Key Lab of Quantum Information University of Science and Technology of China Hefei230026 China Anhui Center for fundamental sciences in theoretical physics University of Science and Technology of China Hefei230026 China Hefei National Laboratory University of Science and Technology of China Hefei230088 China

Enhancing the sensitivity of quantum sensing near an exceptional point represents a significant phenomenon in non-Hermitian (NH) systems. However, the application of this property in time-modulated NH systems remains largely unexplored. In this work, we propose two theoretical schemes to achieve enhanced quantum sensing in time-modulated NH systems by leveraging the coalescence of eigenvalues and eigenstates. We conduct a comprehensive analysis of the full energy spectrum, including both real and imaginary components, the population distribution of eigenstates, and various characteristics associated with optimal conditions for sensitivity enhancement. Numerical simulations confirm that eigenvalue-based quantum sensors exhibit a 9.21-fold improvement compared to conventional Hermitian sensors, aligning with the performance of existing time-independent NH sensors. Conversely, for eigenstate-based quantum sensors, the enhancement reaches up to 50 times that of conventional Hermitian sensors, surpassing the results of existing time-independent NH sensors. Moreover, the eigenstate-based sensor exhibits divergent susceptibility even when not close to an exceptional point. Our findings pave the way for advanced sensing in time-sensitive contexts, thereby complementing existing efforts aimed at harnessing the unique properties of open systems. © 2025, CC BY.

关键词： Eigenvalues and eigenfunctions

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Observation of a single pair of type-III Weyl points in sonic crystals

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Physical Review B 2022年第22期106卷 L220302-L220302页

作者： Xiao-Ping Li Di Zhou Ying Wu Zhi-Ming Yu Feng Li Yugui Yao Centre for Quantum Physics Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement (MOE) School of Physics Beijing Institute of Technology Beijing 100081 China Beijing Key Lab of Nanophotonics and Ultrafine Optoelectronic Systems School of Physics Beijing Institute of Technology Beijing 100081 China School of Physical Science and Technology Inner Mongolia University Hohhot 010021 China School of Science Nanjing University of Science and Technology Nanjing 210094 China

In electronics systems, the Weyl points can be classified into three types based on the geometry of the Fermi surface, and each type exhibits various unique and intriguing phenomena. While the type-I and type-II Weyl points have been achieved in both spinful and spinless systems, the realization of type-III Weyl points remains challenging, and has not been reported in artificial periodic systems. Here, we report the experimental observation of the type-III Weyl points in a sonic crystal. Remarkably, a single pair of type-III Weyl points is observed as the only band crossings in a frequency range, experimentally disproving a common belief in the field, namely, the minimal number of Weyl points in nonmagnetic systems is four. The consistency between experimental results and theoretical predictions confirms the existence of type-III Weyl points, noncontractible Fermi arc surface states, and chiral edge states. Our work not only fills the gap of the type-III Weyl point in sonic crystal but also stimulates related researches in other systems, such as photonic, mechanical, and cold-atom systems.

关键词： Fermi surface Mesoscopics Surface states Topological phases of matter

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Dynamical Coulomb blockade as a signature of the sign-reversing Cooper pairing potential

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Physical Review B 2024年第1期110卷 014514-014514页

作者： Chaofei Liu Pedro Portugal Yi Gao Jie Yang Xiuying Zhang Yanzhao Liu Tianheng Wei Wei Ren Jing Lu Christian Flindt Jian Wang International Center for Quantum Materials School of Physics School of Physics and Wuhan National High Magnetic Field Center Department of Applied Physics Center for Quantum Transport and Thermal Energy Science Jiangsu Key Lab on Opto-Electronic Technology School of Physics and Technology Key Laboratory of Material Physics Ministry of Education and School of Physics State Key Laboratory for Mesoscopic Physics and School of Physics Beijing 100871 China Beijing Key Laboratory for Magnetoelectric Materials and Devices (BKL-MEMD) Beijing 100871 China Yangtze Delta Institute of Optoelectronics Nantong 226000 China Hefei National Laboratory Hefei 230088 China

Coulomb blockade occurs for electrons tunneling into nanoislands because of the quantization of charge. Here, using spectroscopy measurements of nonmagnetic islands grown on a high-Tc superconductor [one-unit-cell (1-UC) FeSe], we systematically investigate the dynamical Coulomb blockade (DCB), which is found to reflect the Cooper pairing potential in the superconducting substrate. The tunneling spectra are acquired on single-crystalline Pb nanoislands and show a clear suppression of the tunnel current around zero-bias voltage with a gaplike structure. The observed spectral gaps can be attributed to DCB based on our comprehensive investigations, including experiments with finely varying island sizes and calculations of the spectra using the P(E) theory of DCB. Our detailed analysis suggests that the observed DCB can be related to the sign-reversing pairing potential in the 1-UC FeSe substrate below the islands. The sign reversal is furthermore revealed in a transition of the superconducting gap of FeSe from a U-like to a V-like line shape as the distance between neighboring doublet islands is decreased, indicating the presence of a nodal-like gap as expected for a sign-reversing superconductor. Our configuration of nonmagnetic nanoislands on a high-Tc superconductor for spectroscopy measurements may serve as a local, spatially sensitive, and tunable probe for detecting the sign-reversing order parameter in unconventional superconductors.

关键词： Coulomb blockade Island Methods in superconductivity Spin fluctuations Superconductivity Surface & interfacial phenomena 2-dimensional systems Crystalline systems High-temperature superconductors Iron-based superconductors Monolayer films Liquid helium cooling Molecular beam epitaxy Scanning tunneling microscopy Scanning tunneling spectroscopy

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