检索结果-内蒙古大学图书馆

2nd International Conference on optical Communication and optical information Processing, OCOIP 2024

作者： Li, Wei Wang, Hong-Wei Ding, Chunling Hao, Xiangying Yuan, Chenzhi Jin, Rui-Bo Hubei Key Laboratory of Optical Information and Pattern Recognition Wuhan Institute of Technology Wuhan430205 China

ISBN: (数字)9781510688995

ISBN: (纸本)9781510688988

The coherent interactions between photons and rare earth ion ensembles are crucial for quantum storage and quantum information processing. Hong-Ou-Mandel (HOM) interference, a well-known quantum interference phenomenon, has been widely used in precision measurement applications. However, there have been no reports to date on observing coherent interactions between light and ionic ensembles using HOM interferometry. In this study, we experimentally generated entangled photons from two 10-mm-long type-0 phase-matched PPKTP crystals. Then we constructed a HOM interferometer and achieved a HOM dip with a visibility of 82.4% and a width of 152.5 ± 0.2 fs. Finally, we inserted a Nd3+ : YVO4 (rare earth ion) crystal into the optical path and successfully observed the splitting of the HOM dip. This experiment may provide valuable insights into light-matter interactions and could be beneficial for quantum storage applications. © 2025 SPIE.

关键词： Photons

来源：评论

学校读者我要写书评

暂无评论

Quantum confocal imaging based on entangled photons 2

Quantum confocal imaging based on entangled photons

引用

2nd International Conference on optical Communication and optical information Processing, OCOIP 2024

作者： Tang, Wen-Zhuo Wang, Hong-Wei Luo, Yu-Hang de Rancourt de Mimérand, Yoann Hao, Xiangying Yuan, Chenzhi Jin, Rui-Bo Hubei Key Laboratory of Optical Information and Pattern Recognition Wuhan Institute of Technology Wuhan430205 China Key Laboratory for Green Chemical Process of Ministry of Education Hubei Key Laboratory of Novel Reactor and Green Chemical Technology School of Chemical Engineering and Pharmacy Wuhan Institute of Technology Wuhan430205 China

ISBN: (数字)9781510688995

ISBN: (纸本)9781510688988

Laser confocal imaging technology has become an important analytical tool in biological, biomedical, and materials science research, offering high imaging precision. However, this technology still has some limitations, especially in imaging biological samples (such as living tissues or cells), where the high intensity of the laser may cause irreversible photodamage. It has been proposed that quantum entangled light sources, instead of laser, can be used to avoid this drawback. In this paper, we experimentally demonstrated a quantum confocal imaging technology employing entangled photon sources with high brightness and stability. In the experiment, we obtained the point-by-point scanning imaging of a targeted area, in which a resolution of 3.91 µm is achieved and the signal-to-noise ratio (SNR) degradation is suppressed. We also theoretically analyzed the potential of quantum confocal imaging to improve SNR performance in photodamage-free imaging. Our results could widen the application fields of confocal imaging technology and pave the way for applying the quantum technology in biological imaging. © 2025 SPIE.

关键词： Quantum entanglement

来源：评论

学校读者我要写书评

暂无评论

Eco-friendly small molecule with polyhydroxyl ketone as buried interface chelator for enhanced carrier dynamics toward high-performance perovskite solar cells

引用

Science China Materials 2025年第4期68卷 1249-1258页

作者： Rui Wu Bingxin Ding Shuping Xiao Wuchen Xiang Yiheng Gao Bobo Yuan Zhongli Qin Xiangbai Chen Pingli Qin Hubei Key Laboratory of Optical Information and Pattern Recognition Wuhan Institute of TechnologyWuhan 430205China School of Electronics and Information Engineering Hubei University of Science and TechnologyXianning 437100China School of Optoelectronic Information and Energy Engineering Wuhan Institute of TechnologyWuhan 430205China

Buried interface defects pose a significant challenge to achieving high efficiency and stability of n-i-p perovskite solar cells(PSCs).A multifunctional material is essential for passivating interface defects,suppressing non-radiative recombination,and facilitating rapid carrier transfer at these ***,a new multifunctional eco-friendly small molecule,D-fructose,was introduced into the interface as a modification layer,playing a significant role in passivating defects not only among SnO_(2) quantum dots(QDs),but also between perovskite and SnO_(2) *** coordination bonds of the C=O group with Pb^(2+)and Sn^(4+)/Sn^(2+),along with the hydrogen bonds of the-OH group with I^(-)in perovskite,contribute to this passivation ***,this multifunctional collaboration at the buried interface not only triggers uniform heterogeneous nucleation across the perovskite precursor film,leading to high-quality perovskite,but also effectively eliminates residual PbI2 at grain boundaries to suppress perovskite *** a more suitable energy level alignment between perovskite and SnO_(2) QDs can smooth the interface barrier,thereby facilitating the formation of an electron bridge for rapid electron extraction and ***,the D-fructose based PSC has achieved a champion efficiency of 24.91%with negligible J-V hysteresis,along with excellent stability.

关键词： D-fructose defect passivation buried interface device stability perovskite solar cells

来源：评论

学校读者我要写书评

暂无评论

Optimal Transport Quantization Based on Cross-X Semantic Hypergraph Learning for Fine-grained Image Retrieval

引用

IEEE Transactions on Circuits and Systems for Video Technology 2025年

作者： Ma, Lei Luo, Xin Shi, Yu Meng, Fanman Wu, Qingbo Hong, Hanyu Wuhan Institute of Technology Hubei Key Laboratory of Optical Information and Pattern Recognition School of Electrical and Information Engineering China School of Electronic Engineering China

Large-scale fine-grained image retrieval aims to learn compact discriminative feature representations based on mining the subtle distinctions between visually similar objects. However, existing fine-grained image retrieval methods focus on enhancing the attention to the discriminative regions within single images, which barely exploit the high-order relational information between the global features and local region features across different images. Thus, the over-fitting problem of complex personalized differences can not be effectively solved. In addition, existing unconstrained vector quantization methods tend to assign unquantized feature vectors to a few major codewords, which are unable to effectively distinguish the quantized features and reduce the redundant information. To address these issues, we propose a novel optimal transport quantization method based on cross-X semantic hypergraph learning for large-scale fine-grained image retrieval. Specifically, we first introduce a cross-layer multi-scale aggregation module to extract the global features and local region features. Subsequently, we build a semantic hypergraph to model the high-order correlations between the global features and local region features extracted from different layers, different scales and different images, which can alleviate the over-fitting problem of complex personalized differences by suppressing sample-level and background noise. Moreover, we introduce an error regularization term into the progressive asymmetric quantization loss to reduce the quantization errors and preserve the semantic similarity. Finally, we attempt to introduce the code balance and uncorrelated constraints into the multi-codebook quantization framework to improve the utilization efficiency of codewords and reduce the redundant information, which can be approximated by solving the optimal transport problem. Experimental results on several fine-grained image datasets demonstrate that the proposed method outperf

关键词： Coarse-grained modeling

来源：评论

学校读者我要写书评

暂无评论

Surface Oxygen Vacancies Induced Formation of Crystalline/Amorphous Heterostructures for Enhanced Zinc-Storage Capacity of Vanadium Oxide

SSRN

引用

SSRN 2025年

作者： Zhan, Chengwei Shi, Junjie Pan, Jing Liu, Yuxuan Zhao, Zhijin Sun, Jinyu Liu, Qingbo Li, Haixia Gao, Yihua Hubei Key Laboratory of Optical Information and Pattern Recognition Wuhan Institute of Technology Wuhan430205 China Wuhan430074 China

Aqueous zinc ion batteries (AZIBs) have gained considerable interest for their excellent cost-effectiveness and enhanced safety features. Nevertheless, the energy storage of AZIBs is limited by the sluggish kinetics resulting from strong electrostatic interactions between divalent zinc ions and the crystal structure of the host material. Herein, this study introduces oxygen vacancies via reduction of the VO2 surface, creating a crystalline/amorphous heterostructure, referred to as ac-VO2. Density functional theory calculations demonstrate that the oxygen vacancies adjust the adsorption energy of Zn2+ on VO2, facilitating reversible adsorption/desorption of Zn2+ ions and lowering their diffusion barrier in VO2. Meanwhile, the crystalline/amorphous heterointerface generates a built-in electric field that enhances electrical conductivity. The capacity of ac-VO2 reaches 435 mAh g-1 at a current density of 0.10 A g-1, and remains high (195 mAh g-1) even at 10.0 A g-1. The proposed approach can potentially provide high-performance cathode materials for AZIBs. © 2025, The Authors. All rights reserved.

关键词： Vanadium dioxide

来源：评论

学校读者我要写书评

暂无评论

High-purity valley-polarized currents induced by bichromatic optical fields in two-dimensional materials

引用

Physical Review B 2025年第11期111卷 115406-115406页

作者： Wenqing Li Xiaosong Zhu Liang Li Wanzhu He Jie Long Pengfei Lan Peixiang Lu Wuhan National Laboratory for Optoelectronics and School of Physics Huazhong University of Science and Technology Wuhan 430074 China Hubei Optical Fundamental Research Center Wuhan 430074 China Hubei Key Laboratory of Optical Information and Pattern Recognition Wuhan Institute of Technology Wuhan 430205 China

Producing currents predominantly from a single valley, namely, valley-polarized currents, at optical-cycle timescales is an important aspect of the petahertz valleytronics, yet it remains less developed. This work exhibits the feasibility of achieving this goal using bichromatic optical fields, which allow for the precise control of subcycle electron dynamics. The combined effect of the helical and asymmetric waveforms of the optical fields leads to highly asymmetric excitation at different valleys and displacement of the excited electrons concurrently, thereby inducing valley-polarized currents with high valley purity, on the sub-optical-cycle timescale. Inherently, the purity of the currents built up from the optical approach remains high even for materials with short decoherence time. Moreover, the direction of the currents can be precisely controlled by adjusting the relative phase of the bichromatic components. Our work offers a promising avenue for generating and modulating high-purity valley-polarized currents at the femtosecond timescale, facilitating the development of petahertz valleytronics.

关键词： Landforms

来源：评论

学校读者我要写书评

暂无评论

Topological corner states for wireless power transfer

引用

Reviews in Physics 2025年 13卷

作者： Jiang, Jie Hu, Shengyu Guo, Zhiwei Ke, Shaolin Wu, Xian Wu, Yuntai Wang, Yuqian Jiang, Haitao Yang, Yaping Chen, Hong MOE Key Laboratory of Advanced Micro-Structured Materials School of Physics Science and Engineering Tongji University Shanghai 200092 China Hubei Key Laboratory of Optical Information and Pattern Recognition Wuhan Institute of Technology Wuhan430205 China

Wireless power transfer (WPT) technology has seen significant advancements, but traditional methods often struggle to meet the demands of complex application scenarios, such as simultaneously powering multiple devices wirelessly. In this paper, we explore the potential of topological corner state (TCS) for multi-load WPT, supported by both theoretical and experimental results. In two-dimensional Su–Schrieffer–Heeger (SSH) systems with only nearest-neighbor (NN) coupling, quadruple TCSs offer an efficient and robust solution for multi-load WPT. Furthermore, by developing bilayer topological structures and incorporating next-nearest-neighbor (NNN) coupling, we achieve dual TCSs and create a flexible platform for multi-load WPT. These findings highlight the diverse topological phenomena enabled by higher-order phases and present a practical approach for various wireless applications, including wireless sensing and communications. © 2025 The Author(s)

关键词： Inductive power transmission

来源：评论

学校读者我要写书评

暂无评论

Topological magnetic corner states in two-dimensional ferrimagnetic metal-organic frameworks

引用

Physical Review B 2025年第7期111卷 075433-075433页

作者： Qing-Bo Liu Xiangyang Li Ziyang Yu Lun Xiong Hua-Hua Fu Hubei Key Laboratory of Optical Information and Pattern Recognition School of Optical Information and Energy Engineering School of Mathematics and Physics Wuhan Institute of Technology Wuhan 430073 China Key Laboratory of Materials Physics Institute of Solid State Physics Hefei Institutes of Physical Science (HFIPS) Chinese Academy of Sciences Hefei 230031 China School of Physics and Wuhan National High Magnetic Field Center Huazhong University of Science and Technology Wuhan 430074 China Institute for Quantum Science and Engineering Huazhong University of Science and Technology Wuhan Hubei 430074 China

Topological corner states have been extensively studied in two-dimensional (2D) topological insulators (TIs), yet they remain rarely reported in 2D magnetic metal-organic frameworks (MOFs). In this work, we uncover the nontrivial corner states protected by C2z and C4z symmetry in three 2D ferrimagnetic MOFs. In the ferrimagnetic Cr(ODZ)2 (DZ = 1.2.5-diazole) with a magnetic space group (MSG) 14.2.87, the occupied electronic bands contain the essential band representations (BRs) of Au@2b and Ag@2c with unconventional features, facilitating the formation of quantized fractional charge (e2) in both spin-up and spin-down channels under C2z symmetry protection. Even in the presence of spin-orbit coupling (SOC), these nontrivial corner states are well preserved. Additionally, the C4z symmetry protected corner states are also identified in two other types of ferrimagnetic MOFs, specifically, Cr(SDZ)2 and Cr(SeDZ)2 monolayers in MSG 100.5.840 in the presence of SOC, contributed by the following basic BRs: Au@2b+Ag@2d. In the former, the magnetic corner states only exist in the spin-up channel, whereas in the latter, they are present in both spin-up and spin-down channels. Our research findings offer an ideal material platform for exploring the application of magnetic corner states in a special topological device.

关键词： Ferrimagnetism

来源：评论

学校读者我要写书评

暂无评论

Searching for topological carbon allotropes and the possible nontrivial quasi-particle states in them

引用

Materials Today Physics 2025年 53卷

作者： Liu, Qing-Bo Xiong, Lun Yu, Ziyang Fu, Hua-Hua Hubei Key Laboratory of Optical Information and Pattern Recognition School of Optical Information and Energy Engineering School of Mathematics and Physics Wuhan Institute of Technology Wuhan430073 China School of Physics and Wuhan National High Magnetic Field Center Huazhong University of Science and Technology Wuhan430074 China Institute for Quantum Science and Engineering Huazhong University of Science and Technology Wuhan Hubei430074 China

Carbon, as one of the most abundant elements on earth, possesses numerous allotropes that display a diverse range of physical properties. In this study, we utilized ab initio calculations and symmetry analyses to investigate 703 carbon allotropes, leading to the discovery of 315 (32) topological phononic (electronic) materials with ideal nontrivial characteristics. The topological phonons encompass single, charge-two, three, and four Weyl phonons, as well as Dirac (Weyl) node-lines phonons. Topological electronic states include topological insulators, Dirac points (Type-II), triple nodal points, and more. To verify this significant discovery, we adopt several real carbon allotropes with uni (pbg) structure within space group (SG) No 178 (230) to showcase their topological characteristics. The uni structure exhibits a combination of single-pair Weyl phonons and one-nodal surface phonons, resulting in a single surface arc in the (100) surface Brillouin zone (BZ) and isolated double-helix surface states in the (110) surface BZ. In the topological semimetal pbg, perfect triple degenerate nodal points near the Fermi level are found, resulting in distinct surface states in the (001) and (110) surfaces BZ. This research not only significantly broadens our understanding of topological quasi-particle states in carbon allotropes, but also offer a valuable material platform for further exploration of topological electrons and phonons in light element materials. © 2025 Elsevier Ltd

关键词： Carbon

来源：评论

学校读者我要写书评

暂无评论

Searching for Topological Carbon Allotropes and the All Possible Nontrivial Quasi-Particle States in Them

SSRN

引用

SSRN 2025年

作者： Liu, Qing-Bo Xiong, Lun Yu, Ziyang Fu, Hua-Hua Hubei Key Laboratory of Optical Information and Pattern Recognition School of Optical Information and Energy Engineering School of Mathematics and Physics Wuhan Institute of Technology Wuhan430073 China School of Physics Wuhan National High Magnetic Field Center Huazhong University of Science and Technology Wuhan430074 China Institute for Quantum Science and Engineering Huazhong University of Science and Technology Hubei Wuhan430074 China

Carbon, as one of the most abundant elements on earth, possesses numerous allotropes that display a diverse range of physical properties. In this study, we utilized ab initio calculations and symmetry analyses to investigate 703 carbon allotropes, leading to the discovery of 315 (32) topological phononic (electronic) materials with ideal nontrival characteristics. The topological phonons encompass single, charge-two, three, and four Weyl phonons, as well as Dirac (Weyl) node-lines phonons. Topological electronic states include topological insulators, Dirac points (Type-II), triple nodal points, and more. To verify this significant discovery, we adopt several real carbon allotropes with uni (pbg) structure within space group (SG) No. 178 (230) to showcase their topological characteristics. The uni structure exhibits a combination of single-pair Weyl phonons and one-nodal surface phonons, resulting in a single surface arc in the (100) surface Brillouin zone (BZ) and isolated double-helix surface states in the (110) surface BZ. In the topological semimetal pbg, perfect triple degenerate nodal points near the Fermi level are found, resulting in distinct surface states in the (001) and (110) surfaces BZ. This research not only significantly broadens our understanding of topological quasi-particle states in carbon allotropes, but also offer a valuable material platform for further exploration of topological electrons and phonons in light element materials. © 2025, The Authors. All rights reserved.

关键词： Phonons

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：