物理与天体物理最新文献_第3页

IEEE Transactions on Applied Superconductivity Information for Authors

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-06-02 DOI: 10.1109/TASC.2025.3566573

引用次数: 0

IEEE Transactions on Applied Superconductivity Publication Information

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-06-02 DOI: 10.1109/TASC.2025.3566657

引用次数: 0

Numerical simulation and design of superconducting cusp magnet for 400 mm Magnetic-field-applied Czochralski (MCZ) single crystal silicon growth

IF 1.3 3区物理与天体物理

Physica C-superconductivity and Its Applications Pub Date : 2025-06-02 DOI: 10.1016/j.physc.2025.1354721

Bin Zhao , Jinxing Zheng , Ming Li , Tao Ma

{"title":"Numerical simulation and design of superconducting cusp magnet for 400 mm Magnetic-field-applied Czochralski (MCZ) single crystal silicon growth","authors":"Bin Zhao , Jinxing Zheng , Ming Li , Tao Ma","doi":"10.1016/j.physc.2025.1354721","DOIUrl":"10.1016/j.physc.2025.1354721","url":null,"abstract":"<div><div>Single crystal silicon is currently used for the production of chips and solar cells, commonly prepared using the Magnetic-field-applied Czochralski (MCZ) method. However, during the crystal growth process, the uneven heating distribution induces a strong thermal convection effect in the melt, which facilitates the doping of the crystal with oxygen impurities and affects the quality of the produced crystals. With the implementation of the cusp magnetic field method, the melt convection can be effectively suppressed. Two symmetrically placed superconducting coils generate a cusp magnetic field by passing currents in opposite directions. In this work, we selected a 42-inch crucible to prepare a single crystal silicon with a diameter of 400 mm. We systematically investigated the convective inhibition effect of the magnetic field by comparing the flow and temperature fields of the melt with and without the applied cusp magnetic field. To achieve a radial magnetic flux density (B<sub>r</sub>) greater than 1000 G at the crucible wall, the parameters of the two superconducting coils were optimized. Based on the optimization results, we fabricated a YBCO high temperature superconducting (HTS) magnet with a coil inner radius of 900 mm and a coil spacing of 350 mm. The cooling structure and the tests were presented, which required 22 days to lower the coil’s temperature to 10.6 K. Finally, B<sub>r</sub> at the crucible wall was measured, yielding a good consistency with the simulated values.</div></div>","PeriodicalId":20159,"journal":{"name":"Physica C-superconductivity and Its Applications","volume":"634 ","pages":"Article 1354721"},"PeriodicalIF":1.3,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144194765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evidence of haze control of Pluto’s atmospheric heat balance from JWST/MIRI thermal light curves 来自JWST/MIRI热光曲线的雾霾控制冥王星大气热平衡的证据

IF 14.1 1区物理与天体物理

Nature Astronomy Pub Date : 2025-06-02 DOI: 10.1038/s41550-025-02573-z

Tanguy Bertrand, Emmanuel Lellouch, Bryan Holler, John Stansberry, Ian Wong, Xi Zhang, Panayotis Lavvas, Elodie Dufaux, Frederic Merlin, Geronimo Villanueva, Linfeng Wan, Noemí Pinilla-Alonso, Ana Carolina de Souza Feliciano, Katherine Murray

{"title":"Evidence of haze control of Pluto’s atmospheric heat balance from JWST/MIRI thermal light curves","authors":"Tanguy Bertrand, Emmanuel Lellouch, Bryan Holler, John Stansberry, Ian Wong, Xi Zhang, Panayotis Lavvas, Elodie Dufaux, Frederic Merlin, Geronimo Villanueva, Linfeng Wan, Noemí Pinilla-Alonso, Ana Carolina de Souza Feliciano, Katherine Murray","doi":"10.1038/s41550-025-02573-z","DOIUrl":"https://doi.org/10.1038/s41550-025-02573-z","url":null,"abstract":"<p>Pluto and its largest moon Charon display a variety of surfaces, whose thermal and energetic properties are largely unknown. Previous thermal measurements of the Pluto–Charon system yield multiple solutions because most of them did not resolve Pluto from Charon. In addition, recent modelling studies suggest that the atmospheric haze of Pluto could substantially contribute to its mid-infrared emission, thus adding further degeneracy. Here we measure separate Pluto and Charon thermal light curves over 15–25.5 μm with JWST and retrieve the thermophysical and emissivity properties of the different terrains on each. We also detect and measure the thermal emission of Pluto’s haze. The observed fluxes indicate that Pluto’s haze is composed of Titan-like organic particles as well as hydrocarbon and nitrile ices and demonstrate that the haze largely controls Pluto’s atmospheric balance. As a result, Pluto’s temperatures, climate and general circulation should therefore be substantially affected by the haze across seasons.</p>","PeriodicalId":18778,"journal":{"name":"Nature Astronomy","volume":"47 1","pages":""},"PeriodicalIF":14.1,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144193024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Physics-Enhanced Learning for Automated Determination of Material Optical Constants 物理增强学习材料光学常数的自动测定

IF 11 1区物理与天体物理

Laser & Photonics Reviews Pub Date : 2025-06-02 DOI: 10.1002/lpor.202500809

Shuo Liu, Xiuguo Chen, Shiyuan Liu

{"title":"Physics-Enhanced Learning for Automated Determination of Material Optical Constants","authors":"Shuo Liu, Xiuguo Chen, Shiyuan Liu","doi":"10.1002/lpor.202500809","DOIUrl":"https://doi.org/10.1002/lpor.202500809","url":null,"abstract":"Accurate determination of optical constants is a prerequisite for various fundamental research and optoelectronic applications of material. Spectroscopic ellipsometry (SE) is almost the standard tool for determining optical constants and thin-film thicknesses, but inverse ellipsometry data analysis traditionally requires prior knowledge about sample materials and involves tedious and time-consuming human-expert intervention, which is widely recognized as a major challenge. Existing deep-learning-based methods allow fast analysis but suffer from poor generalization and lack of physically plausible results. Here, a Smart Ellipsometry Network (SENet) is reported that adopts physics-enhanced learning-based inference for the automated determination of optical constants without prior knowledge or expert intervention. Trained with artificially generated materials that have no connection or resemblance to real-world samples, SENet achieves excellent generalization to realistic thin-film samples in various unseen scenarios, such as nonideal structures, varied measurement conditions, and different substrates. Notably, SENet ensures that predicted optical constants always fulfill the Kramers–Kronig (KK) relations. Moreover, SENet enables highly efficient implementation and yields reliable results in ≈30 s using an ordinary laptop without graphics processing unit (GPU) acceleration. Overall, the developed method opens a new avenue for automated, accurate, and fast determination of material optical constants in a single-click manner.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"5 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144193306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Strange electric resistivity and heat capacity of Fe(Mn,Si) compared to Fermi metals and non-metallic solids

IF 2.1 4区物理与天体物理

Solid State Communications Pub Date : 2025-06-02 DOI: 10.1016/j.ssc.2025.115996

Andrew Das Arulsamy , Ragavendran Venkatesan , Jeyanthinath Mayandi

{"title":"Strange electric resistivity and heat capacity of Fe(Mn,Si) compared to Fermi metals and non-metallic solids","authors":"Andrew Das Arulsamy , Ragavendran Venkatesan , Jeyanthinath Mayandi","doi":"10.1016/j.ssc.2025.115996","DOIUrl":"10.1016/j.ssc.2025.115996","url":null,"abstract":"<div><div>We derive the relevant physical mechanisms to capture the electric and thermoelectric properties of pure and doped FeSi supported by numerous experiments. We first evaluate the temperature- and/or pressure-dependent resistivity data of gold, silver, copper, titanium, lithium, graphene, iron, Fe<span><math><msub><mrow></mrow><mrow><mn>1</mn><mo>−</mo><mi>x</mi></mrow></msub></math></span>C<span><math><msub><mrow></mrow><mrow><mi>x</mi></mrow></msub></math></span>, FeSi and Fe<span><math><msub><mrow></mrow><mrow><mn>1</mn><mo>−</mo><mi>x</mi></mrow></msub></math></span>Mn<span><math><msub><mrow></mrow><mrow><mi>x</mi></mrow></msub></math></span>Si to derive their unequivocal electronic transport phenomena. In doing so, we discovered that the physics of increasing scattering rate for gold is not caused by Kondo effect. We also prove that the diverse electric properties of FeSi are due to Fermi metallic, strange non-metallic and strange metallic phases, where the strange phase obeys Arulsamy fermions. The Fermi metallic phase of FeSi is not related to topological phase, which has been confirmed after exploiting the constant-pressure specific heat capacity data of FeSi and the conductivity data of Mn doped FeSi. Finally, we highlight the temperature—ionization energy phase diagram for FeSi and the possibility to improve the ZT value for the potassium-doped FeSi.</div></div>","PeriodicalId":430,"journal":{"name":"Solid State Communications","volume":"403 ","pages":"Article 115996"},"PeriodicalIF":2.1,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144195212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Towards construction of superintegrable basis in matrix models

IF 2.5 3区物理与天体物理

Nuclear Physics B Pub Date : 2025-06-02 DOI: 10.1016/j.nuclphysb.2025.116975

Batukhan Azheev , Nikita Tselousov

引用次数: 0

Observation of Selective Light-Trapping in Half-Dislocation Dual-Photonic Crystal Microcavity 半位错双光子晶体微腔中选择性光捕获的观察

IF 11 1区物理与天体物理

Laser & Photonics Reviews Pub Date : 2025-06-02 DOI: 10.1002/lpor.202500985

Li Liang, Chengpeng Liang, Xiao Zhang, Jie Liu, Minghan Xu, Longzhen Fan, Feifei Li, Yin Poo

{"title":"Observation of Selective Light-Trapping in Half-Dislocation Dual-Photonic Crystal Microcavity","authors":"Li Liang, Chengpeng Liang, Xiao Zhang, Jie Liu, Minghan Xu, Longzhen Fan, Feifei Li, Yin Poo","doi":"10.1002/lpor.202500985","DOIUrl":"https://doi.org/10.1002/lpor.202500985","url":null,"abstract":"Topological photonic crystal (PhC) microcavities, renowned for their exotic characteristics like high-quality factors (Q - factors) and near-diffraction-limited mode volume, hold tremendous promise for applications in quantum information, laser technology, and integrated photonic chips. However, achieving flexible tunability and asymmetry in multi-cavity systems remains a challenge. In this work, an innovative real-momentum topological dual-optical microcavity system is proposed with two degenerated zero modes. Quite different from the proposed multi-microcavity systems, these two modes exhibit the same phase and are represented as the even mode in one cavity under both dual-cavity coupling and time-reversal symmetry (<i>T</i>-symmetry) breaking, while in the other cavity they display opposite phases and are characterized as the odd modes, which results in only one cavity surviving after superposition. By dynamically manipulating the orientation of the external magnetic field, electric field localization can be selectively activated in a designated microcavity. Both simulations and experimental measurements verify the symmetry of our model. As a promising application, an asymmetric radiation antenna is further proposed, which paves a new avenue for flexible topological PhC devices.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"14 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144193304","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-fidelity reconstruction of compressed hyperspectral images based on physical mechanism guided selective attention network 基于物理机制引导的选择性注意网络的压缩高光谱图像高保真重建

IF 4.6 2区物理与天体物理

Optics and Laser Technology Pub Date : 2025-06-02 DOI: 10.1016/j.optlastec.2025.113268

Ruoyu Dong, Zhiguo Wang, Wei Wang, Rui Zheng

{"title":"High-fidelity reconstruction of compressed hyperspectral images based on physical mechanism guided selective attention network","authors":"Ruoyu Dong, Zhiguo Wang, Wei Wang, Rui Zheng","doi":"10.1016/j.optlastec.2025.113268","DOIUrl":"10.1016/j.optlastec.2025.113268","url":null,"abstract":"<div><div>The core of snapshot compressed hyperspectral imaging is to preserve the rich spectral information in the scene by compressive sampling, and then recover the original hyperspectral image (HSI) from the compressed measurement by reconstruction algorithms. In this paper, we propose a Mask-guided Multi-scale Multi-head Selective Network (M3SNet) to solve this inverse problem. Based on the properties of hyperspectral images (HSIs), we develop a Selective Multi-head Spatial Attention (SMSA) that effectively focuses on the detail differences of HSIs in different bands and improves the reconstruction quality. In addition, by simulating the physical process of HSIs being modulated by a mask, we explore the guiding capability of the mask to direct the attention module to focus on high-fidelity and high-information regions. To further minimize the information loss caused by downsample operations, we propose a Feature Back-Projection Block (FBPB), which enriches the reconstruction details. Quantitative experiments show that our method outperforms many mainstream HSI reconstruction methods across six metrics including Peak Signal-to-Noise Ratio (PSNR), Structural Similarity Index (SSIM), Spectral Angle Mapper (SAM), Relative Dimensionless Global Error in Synthesis (ERGAS), Root Mean Square Error (RMSE) and Universal Image Quality Index (UIQI), while achieving the best balance between algorithmic efficiency and performance. Qualitative experiments show that our model is also much better in visualization.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"191 ","pages":"Article 113268"},"PeriodicalIF":4.6,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144189365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Topology optimization of sub-chambers in a reconfigurable modular origami silencer for tunable and broadband sound attenuation

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2025-06-02 DOI: 10.1016/j.apacoust.2025.110868

Xiaomeng Jin , Hongbin Fang , Qiwei Zhang , Xiang Yu , Li Cheng

{"title":"Topology optimization of sub-chambers in a reconfigurable modular origami silencer for tunable and broadband sound attenuation","authors":"Xiaomeng Jin , Hongbin Fang , Qiwei Zhang , Xiang Yu , Li Cheng","doi":"10.1016/j.apacoust.2025.110868","DOIUrl":"10.1016/j.apacoust.2025.110868","url":null,"abstract":"<div><div>Origami offers abundant design possibilities and exceptional reconfigurability, making it a rich source of inspiration for acoustic device design. In this paper, we propose an innovative design of modular acoustic silencers by incorporating topology optimization techniques with origami-inspired concepts. Specifically, the internal fillers in the silencer sub-chambers are topologically optimized to target specific frequencies for effective sound attenuation, aiming to achieve over 10 dB attenuation across a broad frequency range from 600 Hz to 1800 Hz. Unlike conventional methods that only alter chamber sizes, our approach utilizes advanced topology optimization tools to shape the internal fillers, enabling precise tuning of the effective frequency range without modifying the external size of the silencer. This ensures modular stacking and acoustic programmability. By cascading multiple topologically optimized modules, we can further achieve broadband sound attenuation over a much wider frequency band. The transmission loss behavior can also be strategically adjusted through the folding mechanism. As a proof-of-concept, we fabricate modular origami silencer prototypes with internal fillers by using 3D-printing technology. Experiments are conducted to validate our simulations and the topology optimization process, demonstrating the effectiveness of broadband sound attenuation through cascading multiple chambers, and the distinctive adjustability offered by folding. Overall, this research brings about fresh perspectives for the design, optimization, deployment, and customization of acoustic silencing devices.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"239 ","pages":"Article 110868"},"PeriodicalIF":3.4,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144195902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0