Light-Science & Applications最新文献_第4页

Observing half-integer topological winding numbers in non-Hermitian synthetic lattices 观察非厄米合成晶格中的半整数拓扑圈数

Light-Science & Applications Pub Date : 2025-06-24 DOI: 10.1038/s41377-025-01909-8

Mu Yang, Yu-Wei Liao, Hao-Qing Zhang, Yue Li, Zhi-He Hao, Zheng-Wei Zhou, Xi-Wang Luo, Jin-Shi Xu, Chuan-Feng Li, Guang-Can Guo

{"title":"Observing half-integer topological winding numbers in non-Hermitian synthetic lattices","authors":"Mu Yang, Yu-Wei Liao, Hao-Qing Zhang, Yue Li, Zhi-He Hao, Zheng-Wei Zhou, Xi-Wang Luo, Jin-Shi Xu, Chuan-Feng Li, Guang-Can Guo","doi":"10.1038/s41377-025-01909-8","DOIUrl":"https://doi.org/10.1038/s41377-025-01909-8","url":null,"abstract":"Non-Hermitian (NH) systems have revealed unique topological phenomena that are not observed in Hermitian counterparts, such as novel topology classifications and the NH skin effect. In periodic NH systems, eigenenergies become complex and exhibit windings in the complex plane, while eigenstate winding numbers, which are strictly integers in Hermitian systems, can take half-integer values. However, direct experimental observation of NH winding of both eigenenergies and eigenstates, especially the half-integer winding, remains a significant challenge. In this work, we utilize the orbital angular momentum (OAM) synthetic dimension to construct an NH topological lattice and achieve direct observation of both eigenstate and eigenenergy windings. We report the first experimental observation of a half-integer eigenstate winding number, and reveal the intrinsic relationship between the direction in the NH skin dynamics and eigenenergy windings. Furthermore, by partitioning the OAM chain into two semi-infinite chains, we observe zero boundary modes and demonstrate that their distributions are jointly determined by the winding numbers of both the eigenstates and eigenenergies. This work provides comprehensive insights into NH topologies and offers a new experimental platform for exploring NH phenomena.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":"64 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144371129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Luminescence lifetime thermometers based on hybrid cuprous halides with exceptional water resistance and giant thermal expansion 基于杂化卤化亚铜的发光寿命温度计，具有优异的耐水性和巨大的热膨胀

Light-Science & Applications Pub Date : 2025-06-24 DOI: 10.1038/s41377-025-01910-1

Chenliang Li, Luping Wang, Datao Tu, Xiaoying Shang, Mingjie Yang, Jiacheng Gong, Fei Wen, Yun Xing, Zhi Xie, Jiaxin Jiang, Shaohua Yu, Xueyuan Chen

{"title":"Luminescence lifetime thermometers based on hybrid cuprous halides with exceptional water resistance and giant thermal expansion","authors":"Chenliang Li, Luping Wang, Datao Tu, Xiaoying Shang, Mingjie Yang, Jiacheng Gong, Fei Wen, Yun Xing, Zhi Xie, Jiaxin Jiang, Shaohua Yu, Xueyuan Chen","doi":"10.1038/s41377-025-01910-1","DOIUrl":"https://doi.org/10.1038/s41377-025-01910-1","url":null,"abstract":"Optical probes hold great promise for temperature sensing owing to their attractive properties including rapid response, high spatial resolution, and remote non-invasive detection. However, the exploration of thermometric probes is hindered by their low relative sensitivity (Sr) or poor structural stability in water. Herein, we propose the first example of organic-inorganic metal halides based on TPP3Cu2Br2 (TPP = triphenylphosphine) that simultaneously present excellent water resistance and sensitive temperature-dependent photoluminescence lifetime in water. Benefiting from the soft lattice induced by the organic molecule of TPP, giant thermal expansion and great lattice distortion were achieved with increasing temperature. As such, the self-trapped exciton luminescence lifetime of TPP3Cu2Br2 can be shortened to 1.9% of the initial value from 280 to 380 K, resulting in the highest Sr of 12.82% K−1 among the undoped metal halides based luminescent thermometers. Significantly, TPP3Cu2Br2 displayed extraordinary water stability with emission intensity remaining nearly unchanged after immersing in water for 15 days. Moreover, high-precision luminescence lifetime based thermal sensing in water environment was successfully conducted, which proved to be inert to the detection depth in water with a small read-out error. This work offers new routes in the exploration of novel metal halides for highly sensitive thermometric probes toward versatile application scenarios.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":"70 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144371128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Generation of femtosecond polygonal optical vortices from a mode-locked quasi-frequency-degenerate laser 锁模准频率简并激光产生飞秒多边形光学涡流

Light-Science & Applications Pub Date : 2025-06-23 DOI: 10.1038/s41377-025-01902-1

Hongyu Liu, Lisong Yan, Liang Wang, Dongfang Li, Shenao Zhang, Xin Liu, Heyan Liu, Kunjian Dai, Qing Wang, Jinwei Zhang

引用次数: 0

High momentum two-dimensional propagation of emitted photoluminescence coupled with surface lattice resonance 发射光致发光与表面晶格共振耦合的高动量二维传播

Light-Science & Applications Pub Date : 2025-06-20 DOI: 10.1038/s41377-025-01873-3

Yeonjeong Koo, Dong Kyo Oh, Jungho Mun, Artem N. Abramov, Mikhail Tyugaev, Yong Bin Kim, Inki Kim, Tae Ho Kim, Sera Yang, Yeseul Kim, Jonghwan Kim, Vasily Kravtsov, Junsuk Rho, Kyoung-Duck Park

{"title":"High momentum two-dimensional propagation of emitted photoluminescence coupled with surface lattice resonance","authors":"Yeonjeong Koo, Dong Kyo Oh, Jungho Mun, Artem N. Abramov, Mikhail Tyugaev, Yong Bin Kim, Inki Kim, Tae Ho Kim, Sera Yang, Yeseul Kim, Jonghwan Kim, Vasily Kravtsov, Junsuk Rho, Kyoung-Duck Park","doi":"10.1038/s41377-025-01873-3","DOIUrl":"https://doi.org/10.1038/s41377-025-01873-3","url":null,"abstract":"Dramatic fluorescence enhancement in two-dimensional (2D) van der Waals materials (vdWMs) coupled to plasmonic nanostructures has the potential to enable ultrathin, flexible, and high-brightness illumination devices. However, addressing the limitation of locally scattered small plasmon-enhanced areas remains challenging. Here, we present a 2D plasmonic enhancement of photoluminescence (PL) spanning nearly 800 μm2, enabled by surface lattice resonance (SLR) in a 2D vdWM-Au slot lattice hybrid. The Au slot lattice is designed and fabricated using Babinet’s principle and Rayleigh’s anomaly to maximize radiative decay rate and induce non-local photo-excitation in a MoSe2 monolayer. For emitted PL coupled with SLR, enhanced by up to 32-fold, we investigate its in-plane directivity and long-range propagation using angle- and space-resolved spectroscopic PL measurements. Our experiment reveals that a nearly 800 μm2 2D luminescent sheet can be achieved regardless of the size of the MoSe2 crystal, even with a sub-μm2 flake. This work provides a new type of ultrabright, large-area 2D luminescent material, suitable for a range of optical illumination, communication, and sensing devices.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144328505","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Non-contact and nanometer-scale measurement of PN junction depth buried in Si wafers using terahertz emission spectroscopy 利用太赫兹发射光谱非接触和纳米尺度测量埋在硅片中的PN结深度

Light-Science & Applications Pub Date : 2025-06-20 DOI: 10.1038/s41377-025-01911-0

Fumikazu Murakami, Shinji Ueyama, Kenji Suzuki, Ingi Kim, Inkeun Baek, Sangwoo Bae, Dougyong Sung, Myungjun Lee, Sungyoon Ryu, Yusin Yang, Masayoshi Tonouchi

{"title":"Non-contact and nanometer-scale measurement of PN junction depth buried in Si wafers using terahertz emission spectroscopy","authors":"Fumikazu Murakami, Shinji Ueyama, Kenji Suzuki, Ingi Kim, Inkeun Baek, Sangwoo Bae, Dougyong Sung, Myungjun Lee, Sungyoon Ryu, Yusin Yang, Masayoshi Tonouchi","doi":"10.1038/s41377-025-01911-0","DOIUrl":"https://doi.org/10.1038/s41377-025-01911-0","url":null,"abstract":"Buried channel array transistors enable fast and high-density integrated devices. The depth of the PN junction and carrier dynamics at the depletion layer in silicon wafers have a crucial influence on their performance and reliability. Therefore, rapid and non-contact/non-destructive inspection tools are necessary to accelerate the semiconductor industry. Despite the great efforts in this field, realizing a technique to probe the junction depth and carrier dynamics at the PN junction inside wafers remains challenging. Herein, we propose a new approach to access PN junctions embedded in wafers using terahertz (THz) emission spectroscopy. THz emission measurements and simulations demonstrate that the amplitude and polarity of THz emissions reflect the junction depth and carrier dynamics at the PN junctions. It allows us to evaluate the junction depth non-destructively with nanometer-scale accuracy, surpassing the limits of traditional techniques. Laser-induced THz emission spectroscopy is a promising method for the sensitive and non-contact/non-destructive evaluation of Si wafers and will benefit the modern semiconductor industry.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144328510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Visual and non-visual effects of the phosphor-free white LED lamps rich in the 535–589-nm yellow-green light 无磷白光LED灯的视觉和非视觉效果丰富的535 - 589 nm黄绿色光

Light-Science & Applications Pub Date : 2025-06-20 DOI: 10.1038/s41377-025-01896-w

Shanshan Zeng, Ya Guo, Wentao Hao, Xin Luo, Xing Guo, Jianli Zhang, Jianqi Cai, Guangxu Wang

引用次数: 0

Nanoscale ultrafast camera unveils light-matter dynamics in real time and space 纳米级超快相机揭示了实时和空间的光-物质动力学

Light-Science & Applications Pub Date : 2025-06-20 DOI: 10.1038/s41377-025-01908-9

Jae Won Ryu, Kyoung-Duck Park

引用次数: 0

State-multiplexing approach for optimized expansion of entanglement-based quantum networks 基于纠缠的量子网络优化扩展的状态复用方法

Light-Science & Applications Pub Date : 2025-06-20 DOI: 10.1038/s41377-025-01892-0

Anahita Khodadad Kashi, Michael Kues

引用次数: 0

Full color visible imaging with crystalline silicon meta-optics 全彩色可见成像与晶体硅元光学

Light-Science & Applications Pub Date : 2025-06-18 DOI: 10.1038/s41377-025-01888-w

Johannes E. Fröch, Luocheng Huang, Zhihao Zhou, Virat Tara, Zhuoran Fang, Shane Colburn, Alan Zhan, Minho Choi, Arnab Manna, Andrew Tang, Zheyi Han, Karl F. Böhringer, Arka Majumdar

引用次数: 0

Germanium disulfide as an alternative high refractive index and transparent material for UV-visible nanophotonics. 二硫化锗作为一种高折射率、透明的紫外可见纳米光子学材料。

Light-Science & Applications Pub Date : 2025-06-18 DOI: 10.1038/s41377-025-01886-y

Aleksandr S Slavich,Georgy A Ermolaev,Ilya A Zavidovskiy,Dmitriy V Grudinin,Konstantin V Kravtsov,Mikhail K Tatmyshevskiy,Mikhail S Mironov,Adilet N Toksumakov,Gleb I Tselikov,Ilia M Fradkin,Kirill V Voronin,Maksim R Povolotskiy,Olga G Matveeva,Alexander V Syuy,Dmitry I Yakubovsky,Dmitry M Tsymbarenko,Ivan Kruglov,Davit A Ghazaryan,Sergey M Novikov,Andrey A Vyshnevyy,Aleksey V Arsenin,Valentyn S Volkov,Kostya S Novoselov

{"title":"Germanium disulfide as an alternative high refractive index and transparent material for UV-visible nanophotonics.","authors":"Aleksandr S Slavich,Georgy A Ermolaev,Ilya A Zavidovskiy,Dmitriy V Grudinin,Konstantin V Kravtsov,Mikhail K Tatmyshevskiy,Mikhail S Mironov,Adilet N Toksumakov,Gleb I Tselikov,Ilia M Fradkin,Kirill V Voronin,Maksim R Povolotskiy,Olga G Matveeva,Alexander V Syuy,Dmitry I Yakubovsky,Dmitry M Tsymbarenko,Ivan Kruglov,Davit A Ghazaryan,Sergey M Novikov,Andrey A Vyshnevyy,Aleksey V Arsenin,Valentyn S Volkov,Kostya S Novoselov","doi":"10.1038/s41377-025-01886-y","DOIUrl":"https://doi.org/10.1038/s41377-025-01886-y","url":null,"abstract":"Thanks to their record high refractive index and giant optical anisotropy, van der Waals (vdW) materials have accelerated the development of nanophotonics. However, traditional high refractive index materials, such as titanium dioxide (TiO2), still dominate in the most important visible range. This is due to the current lack of transparent vdW materials across the entire visible spectrum. In this context, we propose that germanium disulfide (GeS2) could offer a significant breakthrough. With its high refractive index, negligible losses, and biaxial optical anisotropy across the whole visible range, GeS2 has the potential to complement TiO2 and close the application gap of vdW materials in the visible spectrum. The addition of GeS2 could have a profound impact on the design of van der Waals nanophotonic circuits for any operation wavelength from ultraviolet to infrared, emphasizing the significance of the potential impact of GeS2 on the field of nanophotonics.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":"14 1","pages":"213"},"PeriodicalIF":0.0,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144311605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0