Pub Date : 2026-02-05DOI: 10.1038/s41566-025-01831-w
Yikai Su, Yong Zhang
Lithium tantalate (LiTaO3) is heterogeneously integrated with silicon photonics circuits, enabling high modulation speed, reduced bias drift and a high optical damage threshold, while ensuring full compatibility with the existing silicon photonics process design kit.
{"title":"Lithium tantalate meets silicon photonics","authors":"Yikai Su, Yong Zhang","doi":"10.1038/s41566-025-01831-w","DOIUrl":"10.1038/s41566-025-01831-w","url":null,"abstract":"Lithium tantalate (LiTaO3) is heterogeneously integrated with silicon photonics circuits, enabling high modulation speed, reduced bias drift and a high optical damage threshold, while ensuring full compatibility with the existing silicon photonics process design kit.","PeriodicalId":18926,"journal":{"name":"Nature Photonics","volume":"20 2","pages":"133-134"},"PeriodicalIF":32.9,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146117010","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}
Pub Date : 2026-02-05DOI: 10.1038/s41566-025-01838-3
Malte C. Kaluza
A Hydrogen plasma that is generated with controllable density distribution can act as a lens to tightly focus extreme-ultraviolet attosecond pulses.
一种密度分布可控的氢等离子体可以作为透镜紧密聚焦极紫外阿秒脉冲。
{"title":"A lens for attosecond pulses","authors":"Malte C. Kaluza","doi":"10.1038/s41566-025-01838-3","DOIUrl":"10.1038/s41566-025-01838-3","url":null,"abstract":"A Hydrogen plasma that is generated with controllable density distribution can act as a lens to tightly focus extreme-ultraviolet attosecond pulses.","PeriodicalId":18926,"journal":{"name":"Nature Photonics","volume":"20 2","pages":"129-130"},"PeriodicalIF":32.9,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146117001","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}
Pub Date : 2026-02-05DOI: 10.1038/s41566-025-01834-7
Yun-Ru Fan, Qiang Zhou
Mode mixing and mapping with a piece of multimode optical fibre and spatial light modulators creates a bridge between two isolated quantum networks, linking distant nodes with quantum connectivity.
{"title":"Scaling quantum photonics networks","authors":"Yun-Ru Fan, Qiang Zhou","doi":"10.1038/s41566-025-01834-7","DOIUrl":"10.1038/s41566-025-01834-7","url":null,"abstract":"Mode mixing and mapping with a piece of multimode optical fibre and spatial light modulators creates a bridge between two isolated quantum networks, linking distant nodes with quantum connectivity.","PeriodicalId":18926,"journal":{"name":"Nature Photonics","volume":"20 2","pages":"131-132"},"PeriodicalIF":32.9,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146117002","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}
Pub Date : 2026-02-04DOI: 10.1038/s41566-026-01847-w
Jing Cheng Zhang, Din Ping Tsai, Stella W. Pang
{"title":"Non-local bound states in the continuum for nanoscale alignment","authors":"Jing Cheng Zhang, Din Ping Tsai, Stella W. Pang","doi":"10.1038/s41566-026-01847-w","DOIUrl":"https://doi.org/10.1038/s41566-026-01847-w","url":null,"abstract":"","PeriodicalId":18926,"journal":{"name":"Nature Photonics","volume":"215 1","pages":""},"PeriodicalIF":35.0,"publicationDate":"2026-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146115954","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}
Pub Date : 2026-02-03DOI: 10.1038/s41566-025-01837-4
Haoran Chen, Ruxuan Liu, Gedalia Y. Koehler, Fatemehsadat Tabatabaei, Xiangwen Guo, Shuman Sun, Zijiao Yang, Beichen Wang, Andreas Beling, Xu Yi
Integrated photonics has undergone tremendous development in the past few decades. Loss and gain are two fundamental parameters in photonic integrated circuits (PICs) and have direct impacts on nearly all key performance metrics. Surprisingly, the tools to characterize the optical loss and gain inside PICs are very limited. This is because, unlike free-space or fibre optics, integrated circuits cannot be non-destructively disassembled. Here we report a universal method to see inside the PICs and measure loss and gain on the component level non-destructively. The method leverages nonlinear optical devices as optical power discriminators to retrieve the loss and gain information. Our method has a precision better than 0.1 dB and can characterize the loss of individual fibre–chip coupling facets as well as general unknown devices under test. As an application, we measured the true on-chip quantum efficiency of a quantum PIC consisting of heterogeneously integrated balanced photodiodes, a critical building block for integrated quantum technology. Our non-destructive and highly precise method can be implemented on different photonic platforms to understand gain and loss in complex photonic circuits, which is essential to optimize circuit design and to create large-scale systems with predictable, reproducible performance.
{"title":"Universal loss and gain characterization inside photonic integrated circuits","authors":"Haoran Chen, Ruxuan Liu, Gedalia Y. Koehler, Fatemehsadat Tabatabaei, Xiangwen Guo, Shuman Sun, Zijiao Yang, Beichen Wang, Andreas Beling, Xu Yi","doi":"10.1038/s41566-025-01837-4","DOIUrl":"https://doi.org/10.1038/s41566-025-01837-4","url":null,"abstract":"Integrated photonics has undergone tremendous development in the past few decades. Loss and gain are two fundamental parameters in photonic integrated circuits (PICs) and have direct impacts on nearly all key performance metrics. Surprisingly, the tools to characterize the optical loss and gain inside PICs are very limited. This is because, unlike free-space or fibre optics, integrated circuits cannot be non-destructively disassembled. Here we report a universal method to see inside the PICs and measure loss and gain on the component level non-destructively. The method leverages nonlinear optical devices as optical power discriminators to retrieve the loss and gain information. Our method has a precision better than 0.1 dB and can characterize the loss of individual fibre–chip coupling facets as well as general unknown devices under test. As an application, we measured the true on-chip quantum efficiency of a quantum PIC consisting of heterogeneously integrated balanced photodiodes, a critical building block for integrated quantum technology. Our non-destructive and highly precise method can be implemented on different photonic platforms to understand gain and loss in complex photonic circuits, which is essential to optimize circuit design and to create large-scale systems with predictable, reproducible performance.","PeriodicalId":18926,"journal":{"name":"Nature Photonics","volume":"5 1","pages":""},"PeriodicalIF":35.0,"publicationDate":"2026-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146102145","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}
Pub Date : 2026-02-02DOI: 10.1038/s41566-025-01840-9
Jesús Yelo-Sarrión, François Leo, Simon-Pierre Gorza
The generation of optically coherent ultrashort pulses by mode-locked lasers has revolutionized advancements in modern science and technology. These pulses often arise from the formation of dissipative solitons, which emerge due to a balance between energy excitation and dissipation. Harnessing the concept of parity–time (PT) symmetry to control this balance, we demonstrate a new type of laser dissipative soliton hosted in linearly coupled ring cavities. Our experiments are performed in a laser where the linear hybridized modes are in the PT-symmetric phase. Here we experimentally observe the formation of short pulses, stabilized by the selective breaking of the PT symmetry by Kerr nonlinearity. Our results unlock new possibilities for passive mode-locking by demonstrating spontaneous pulse formation in PT-symmetric lasers, which hold the potential for simple cavity designs.
{"title":"Dissipative solitons in mode-locked parity–time-symmetric lasers","authors":"Jesús Yelo-Sarrión, François Leo, Simon-Pierre Gorza","doi":"10.1038/s41566-025-01840-9","DOIUrl":"https://doi.org/10.1038/s41566-025-01840-9","url":null,"abstract":"The generation of optically coherent ultrashort pulses by mode-locked lasers has revolutionized advancements in modern science and technology. These pulses often arise from the formation of dissipative solitons, which emerge due to a balance between energy excitation and dissipation. Harnessing the concept of parity–time (PT) symmetry to control this balance, we demonstrate a new type of laser dissipative soliton hosted in linearly coupled ring cavities. Our experiments are performed in a laser where the linear hybridized modes are in the PT-symmetric phase. Here we experimentally observe the formation of short pulses, stabilized by the selective breaking of the PT symmetry by Kerr nonlinearity. Our results unlock new possibilities for passive mode-locking by demonstrating spontaneous pulse formation in PT-symmetric lasers, which hold the potential for simple cavity designs.","PeriodicalId":18926,"journal":{"name":"Nature Photonics","volume":"8 1","pages":""},"PeriodicalIF":35.0,"publicationDate":"2026-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146102146","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}
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