Nature Photonics最新文献_第9页

Topological orbital angular momentum extraction and twofold protection of vortex transport 拓扑轨道角动量提取与涡流传输的双重保护

IF 32.3 1区物理与天体物理

Nature Photonics Pub Date : 2024-11-20 DOI: 10.1038/s41566-024-01564-2

Zhichan Hu, Domenico Bongiovanni, Ziteng Wang, Xiangdong Wang, Daohong Song, Jingjun Xu, Roberto Morandotti, Hrvoje Buljan, Zhigang Chen

{"title":"Topological orbital angular momentum extraction and twofold protection of vortex transport","authors":"Zhichan Hu, Domenico Bongiovanni, Ziteng Wang, Xiangdong Wang, Daohong Song, Jingjun Xu, Roberto Morandotti, Hrvoje Buljan, Zhigang Chen","doi":"10.1038/s41566-024-01564-2","DOIUrl":"10.1038/s41566-024-01564-2","url":null,"abstract":"Vortex phenomena are ubiquitous in nature. In optics, despite the availability of numerous techniques for vortex generation and detection, topological protection of vortex transport with desired orbital angular momentum (OAM) remains a challenge. Here, by use of topological disclination, we demonstrate a scheme to confine and guide vortices featuring arbitrary high-order charges. Such a scheme relies on twofold topological protection: a non-trivial winding in momentum space due to chiral symmetry, and a non-trivial winding in real space due to the complex coupling of OAM modes across the disclination structure. We unveil a vorticity-coordinated rotational symmetry, which sets up a universal relation between the vortex topological charge and the rotational symmetry order of the system. As an example, we construct photonic disclination lattices with a single core but different Cn symmetries and achieve robust transport of an optical vortex with preserved OAM solely corresponding to one selected zero-energy vortex mode at the mid-gap. Furthermore, we show that such topological structures can be used for vortex filtering to extract a chosen OAM mode from mixed excitations. Our results illustrate the fundamental interplay of vorticity, disclination and higher-order topology, which may open a new pathway for the development of OAM-based photonic devices such as vortex guides, fibres and lasers. Topological protection in disclination lattices that relies on non-trivial winding in momentum space and real space is used to confine and guide vortices that feature arbitrary high-order charges. This approach could help in the development of orbital angular momentum-based photonic devices.","PeriodicalId":18926,"journal":{"name":"Nature Photonics","volume":"19 2","pages":"162-169"},"PeriodicalIF":32.3,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41566-024-01564-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142673513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Expanding momentum bandgaps in photonic time crystals through resonances 通过共振扩大光子时间晶体的动量带隙

IF 32.3 1区物理与天体物理

Nature Photonics Pub Date : 2024-11-12 DOI: 10.1038/s41566-024-01563-3

X. Wang, P. Garg, M. S. Mirmoosa, A. G. Lamprianidis, C. Rockstuhl, V. S. Asadchy

{"title":"Expanding momentum bandgaps in photonic time crystals through resonances","authors":"X. Wang, P. Garg, M. S. Mirmoosa, A. G. Lamprianidis, C. Rockstuhl, V. S. Asadchy","doi":"10.1038/s41566-024-01563-3","DOIUrl":"10.1038/s41566-024-01563-3","url":null,"abstract":"The realization of photonic time crystals is a major opportunity but also comes with considerable challenges. The most pressing one, potentially, is the requirement for a substantial modulation strength in the material properties to create a noticeable momentum bandgap. Reaching that noticeable bandgap in optics is highly demanding with current, and possibly also future materials platforms because their modulation strength is small by tendency. Here we demonstrate that by introducing temporal variations in a resonant material, the momentum bandgap can be drastically expanded with modulation strengths in reach with known low-loss materials and realistic laser pump powers. The resonance can emerge from an intrinsic material resonance or a suitably spatially structured material supporting a structural resonance. Our concept is validated for resonant bulk media and optical metasurfaces and paves the way towards the first experimental realizations of photonic time crystals. Optical realization of photonic time crystals can be achieved by using temporal variations in a resonant material to expand the momentum bandgap, even at low modulation strengths, with known low-loss materials and realistic laser pump powers.","PeriodicalId":18926,"journal":{"name":"Nature Photonics","volume":"19 2","pages":"149-155"},"PeriodicalIF":32.3,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41566-024-01563-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142599378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Author Correction: Image-guided computational holographic wavefront shaping 作者更正：图像引导的计算全息波前整形

IF 32.3 1区物理与天体物理

Nature Photonics Pub Date : 2024-11-06 DOI: 10.1038/s41566-024-01585-x

Omri Haim, Jeremy Boger-Lombard, Ori Katz

引用次数: 0

Efficient and stable perovskite-silicon tandem solar cells with copper thiocyanate-embedded perovskite on textured silicon 在纹理硅上使用硫氰酸铜嵌入包晶石的高效稳定的包晶石-硅串联太阳能电池

IF 32.3 1区物理与天体物理

Nature Photonics Pub Date : 2024-11-04 DOI: 10.1038/s41566-024-01561-5

Chenxia Kan, Pengjie Hang, Shibo Wang, Biao Li, Xuegong Yu, Xinbo Yang, Yuxin Yao, Wei Shi, Stefaan De Wolf, Jun Yin, Daoyong Zhang, Degong Ding, Cao Yu, Shaofei Yang, Jiteng Zhang, Jia Yao, Xiaohong Zhang, Deren Yang

{"title":"Efficient and stable perovskite-silicon tandem solar cells with copper thiocyanate-embedded perovskite on textured silicon","authors":"Chenxia Kan, Pengjie Hang, Shibo Wang, Biao Li, Xuegong Yu, Xinbo Yang, Yuxin Yao, Wei Shi, Stefaan De Wolf, Jun Yin, Daoyong Zhang, Degong Ding, Cao Yu, Shaofei Yang, Jiteng Zhang, Jia Yao, Xiaohong Zhang, Deren Yang","doi":"10.1038/s41566-024-01561-5","DOIUrl":"10.1038/s41566-024-01561-5","url":null,"abstract":"Monolithic perovskite/silicon tandem solar cells have achieved promising performance. However, hole transport layers that are commonly used for the perovskite top cell suffer from defects, non-conformal deposition or de-wetting of the overlying perovskite on the textured silicon bottom cells. These issues detrimentally affect device reproducibility and scalability, and thus commercialization. Here we address these challenges through the co-deposition of copper(I) thiocyanate and perovskite, where effective perovskite grain boundary passivation and efficient hole collection are simultaneously achieved by the embedded copper(I) thiocyanate, which creates local hole-collecting contacts. Fabricated monolithic perovskite/silicon tandem devices achieve a certified power conversion efficiency of 31.46% for 1 cm2 area devices. Aside from good reproducibility and scalability, our tandem cells exhibit excellent stability, maintaining 93.8% of their initial power conversion efficiency after about 1,200 h of maximum power point tracking at 45 °C, and 90.2% after over 1,000 h of damp-heat testing at 85 °C and 85% relative humidity. Co-deposition of copper thiocyanate with perovskite on textured silicon enables an efficient perovskite-silicon tandem solar cell with a certified power conversion efficiency of 31.46% for 1 cm2 area devices.","PeriodicalId":18926,"journal":{"name":"Nature Photonics","volume":"19 1","pages":"63-70"},"PeriodicalIF":32.3,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142574314","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

Minute-scale Schrödinger-cat state of spin-5/2 atoms 自旋 5/2 原子的微尺度薛定谔猫态

IF 32.3 1区物理与天体物理

Nature Photonics Pub Date : 2024-11-01 DOI: 10.1038/s41566-024-01555-3

Y. A. Yang, W.-T. Luo, J.-L. Zhang, S.-Z. Wang, Chang-Ling Zou, T. Xia, Z.-T. Lu

{"title":"Minute-scale Schrödinger-cat state of spin-5/2 atoms","authors":"Y. A. Yang, W.-T. Luo, J.-L. Zhang, S.-Z. Wang, Chang-Ling Zou, T. Xia, Z.-T. Lu","doi":"10.1038/s41566-024-01555-3","DOIUrl":"10.1038/s41566-024-01555-3","url":null,"abstract":"Quantum metrology with non-classical states offers a promising route to improved precision in physical measurements. The quantum effects of Schrödinger-cat superpositions or entanglements enable measurement uncertainties to reach below the standard quantum limit. However, the challenge of maintaining a long coherence time for such non-classical states often prevents full exploitation of the quantum advantage in metrology. Here we demonstrate a long-lived Schrödinger-cat state of optically trapped 173Yb (I = 5/2) atoms. The cat state, a superposition of two oppositely directed and furthest-apart spin states, is generated by a nonlinear spin rotation. Protected in a decoherence-free subspace against inhomogeneous light shifts of an optical lattice, the cat state persists for a coherence time of 1.4(1) × 103 s. A magnetic field is measured using Ramsey interferometry, demonstrating a scheme of Heisenberg-limited metrology for atomic magnetometry, quantum information processing and searching for new physics beyond the Standard Model. Using spin-5/2 nuclei of 173Yb atoms trapped in an optical lattice, a Schrödinger-cat state persists for a coherence time of 1.4 × 103 s. In measuring external magnetic fields, the cat state exhibits a sensitivity approaching the Heisenberg limit.","PeriodicalId":18926,"journal":{"name":"Nature Photonics","volume":"19 1","pages":"89-94"},"PeriodicalIF":32.3,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142561971","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

Attosecond transient interferometry 阿秒瞬态干涉测量

IF 32.3 1区物理与天体物理

Nature Photonics Pub Date : 2024-11-01 DOI: 10.1038/s41566-024-01556-2

Omer Kneller, Chen Mor, Nikolai D. Klimkin, Noa Yaffe, Michael Krüger, Doron Azoury, Ayelet J. Uzan-Narovlansky, Yotam Federman, Debobrata Rajak, Barry D. Bruner, Olga Smirnova, Serguei Patchkovskii, Yann Mairesse, Misha Ivanov, Nirit Dudovich

{"title":"Attosecond transient interferometry","authors":"Omer Kneller, Chen Mor, Nikolai D. Klimkin, Noa Yaffe, Michael Krüger, Doron Azoury, Ayelet J. Uzan-Narovlansky, Yotam Federman, Debobrata Rajak, Barry D. Bruner, Olga Smirnova, Serguei Patchkovskii, Yann Mairesse, Misha Ivanov, Nirit Dudovich","doi":"10.1038/s41566-024-01556-2","DOIUrl":"10.1038/s41566-024-01556-2","url":null,"abstract":"Attosecond transient absorption resolves the instantaneous response of a quantum system as it interacts with a laser field, by mapping its sub-cycle dynamics onto the absorption spectrum of attosecond pulses. However, the quantum dynamics are imprinted in the amplitude, phase and polarization state of the attosecond pulses. Here we introduce attosecond transient interferometry and measure the transient phase, as we follow its evolution within the optical cycle. We demonstrate how such phase information enables us to decouple the multiple quantum paths induced in a light-driven system, isolating their coherent contribution and retrieving their temporal evolution. Applying attosecond transient interferometry reveals the Stark shift dynamics in helium and retrieves long-term electronic coherences in neon. Finally, we present a vectorial generalization of our scheme, theoretically demonstrating the ability to isolate the underlying anomalous current in light-driven topological materials. Our scheme provides a direct insight into the interplay of light-induced dynamics and topology. Attosecond transient interferometry holds the potential to considerably extend the scope of attosecond metrology, revealing the underlying coherences in light-driven complex systems. Sub-cycle phase-resolved attosecond interferometry is developed. The obtained phase information enables us to decouple the multiple quantum paths induced in a light-driven system, isolating their coherent contribution and retrieving their temporal evolution.","PeriodicalId":18926,"journal":{"name":"Nature Photonics","volume":"19 2","pages":"134-141"},"PeriodicalIF":32.3,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41566-024-01556-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142561970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Small tunable X-ray sources may have large impact 小型可调谐 X 射线源可能产生巨大影响

IF 32.3 1区物理与天体物理

Nature Photonics Pub Date : 2024-10-31 DOI: 10.1038/s41566-024-01552-6

Gordon Robb

引用次数: 0

Refractive index engineering makes skin transparent 折射率工程让皮肤变得透明

IF 32.3 1区物理与天体物理

Nature Photonics Pub Date : 2024-10-31 DOI: 10.1038/s41566-024-01562-4

Oliver Graydon

引用次数: 0

Time crystals for photonics and timetronics 用于光子学和时间电子学的时间晶体