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Quasi-BIC metasurfaces enable rapid, localized singlet-oxygen generation 准bic超表面可以实现快速、局部的单重态氧生成
Light-Science & Applications Pub Date : 2026-04-03 DOI: 10.1038/s41377-026-02267-9
Ruilin Long, Laifu Lin, Xinwen Qi, Qiang Liu, Xing Fu
{"title":"Quasi-BIC metasurfaces enable rapid, localized singlet-oxygen generation","authors":"Ruilin Long, Laifu Lin, Xinwen Qi, Qiang Liu, Xing Fu","doi":"10.1038/s41377-026-02267-9","DOIUrl":"https://doi.org/10.1038/s41377-026-02267-9","url":null,"abstract":"Bound states in the continuum (BIC) provide a photonic route to concentrate and store electromagnetic energy with minimal radiative leakage. Here, we report Au–TiO <jats:sub>2</jats:sub> metasurfaces that couple q-BIC optical resonance to interfacial charge transfer, enabling hot-carrier–mediated generation of <jats:sup>1</jats:sup> O <jats:sub>2</jats:sub> within subwavelength optical paths. Photonic engineering acts through two cooperative effects: (i) increased optical absorption that boosts hot-carrier generation at the Au/TiO <jats:sub>2</jats:sub> interface; and (ii) ultralow noble-metal loading that suppresses electron–hole recombination at metal/semiconductor junctions, thereby prolonging carrier lifetimes. These effects jointly yield a synergistic enhancement of <jats:sup>1</jats:sup> O <jats:sub>2</jats:sub> production beyond either pathway alone. Under continuous-wave excitation, the metasurfaces reach a local molar-level concentration of <jats:sup>1</jats:sup> O <jats:sub>2</jats:sub> within seconds, corresponding to an approximately six-order-of-magnitude increase in local <jats:sup>1</jats:sup> O <jats:sub>2</jats:sub> concentration compared with conventional approaches. Tuning structural asymmetry and excitation wavelength enables wavelength- and position-selective cytotoxicity without additional molecular sensitizers. By decoupling strong absorption from nobel-metal usage while extending hot-carrier persistence in a single platform, BIC-engineered metasurfaces offer a general way to achieve efficient photon-to-chemical conversion at solid–liquid interfaces. This approach is of significant value to rapid-acting photodynamic therapy, selective oxidation, and flow microreactors where low dose and geometric precision are critical.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147611739","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
Full-space inverse-designed meta-optics for complex vector field shaping of intracavity landscapes 腔内景观复杂矢量场整形的全空间反设计元光学
Light-Science & Applications Pub Date : 2026-04-03 DOI: 10.1038/s41377-026-02258-w
Mingfeng Xu, Di Sang, Mingbo Pu, Ping Gao, Bowen Zhao, Yuhan Zheng, Qingji Zeng, Lianwei Chen, Fei Zhang, Yinghui Guo, Xiong Li, Xiaoliang Ma, Yunqi Fu, Xiangang Luo
{"title":"Full-space inverse-designed meta-optics for complex vector field shaping of intracavity landscapes","authors":"Mingfeng Xu, Di Sang, Mingbo Pu, Ping Gao, Bowen Zhao, Yuhan Zheng, Qingji Zeng, Lianwei Chen, Fei Zhang, Yinghui Guo, Xiong Li, Xiaoliang Ma, Yunqi Fu, Xiangang Luo","doi":"10.1038/s41377-026-02258-w","DOIUrl":"https://doi.org/10.1038/s41377-026-02258-w","url":null,"abstract":"The sophisticated shaping of electromagnetic field landscapes, both outside and inside optical cavities, has long been an important goal of optics and photonics, with broad applications in near-field imaging, lithography, and laser science. Despite extensive progress in far-field shaping of extracavity landscapes, achieving accurate tailoring of three-dimensional intracavity fields has remained elusive. Here, we propose full-space adjoint-enabled freeform meta-optics for complex, on-demand vector field shaping of intracavity landscapes. In contrast with conventional semi-space adjoint approaches, the full-space adjoint strategy allows for efficient full-wave optimization of vector fields at the subwavelength scale, overcoming strong multiple scattering and interference intrinsic to enclosed cavity boundaries. We experimentally demonstrate tailored plasmonic cavity landscapes with a freeform metasurface mask, realizing a fivefold enhancement in imaging fidelity without sacrificing optical super-resolution performance. Our work significantly broadens the scope of freeform meta-optics and may open new avenues for applications in nanophotonics, topological photonics, and quantum optics.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":"27 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147611738","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
Gapless tunable intense terahertz pulse generation in strained diamond. 张力金刚石中无间隙可调谐强太赫兹脉冲的产生。
Light-Science & Applications Pub Date : 2026-03-31 DOI: 10.1038/s41377-025-02092-6
Yudan Su,Yuxuan Wei,Chaonan Lin,Li Huang,Jiaming Le,Chong-Xin Shan,A H Kung,Chuanshan Tian,Y Ron Shen
{"title":"Gapless tunable intense terahertz pulse generation in strained diamond.","authors":"Yudan Su,Yuxuan Wei,Chaonan Lin,Li Huang,Jiaming Le,Chong-Xin Shan,A H Kung,Chuanshan Tian,Y Ron Shen","doi":"10.1038/s41377-025-02092-6","DOIUrl":"https://doi.org/10.1038/s41377-025-02092-6","url":null,"abstract":"We demonstrate collinear phase matching of transient coherent Stokes Raman scattering (CSRS) in strained diamond, enabling generation of intense, high-quality, femtosecond THz pulses over a gapless frequency band from 5 to beyond 15 THz. Our experimental results confirm this mechanism, supported by the theoretical calculations that agrees well with measurements. The theoretical model also provides a clear picture on how the input pulses should be adjusted to optimize the THz output from a diamond of given length.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":"42 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147583866","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
Power-efficient ultra-broadband soliton microcombs in resonantly-coupled microresonators. 谐振耦合微谐振器中的高能效超宽带孤子微梳。
Light-Science & Applications Pub Date : 2026-03-30 DOI: 10.1038/s41377-026-02186-9
Kaixuan Zhu,Xinrui Luo,Yuanlei Wang,Ze Wang,Tianyu Xu,Du Qian,Yinke Cheng,Junqi Wang,Haoyang Luo,Yanwu Liu,Xing Jin,Zhenyu Xie,Xin Zhou,Min Wang,Jian-Fei Liu,Xuening Cao,Ting Wang,Shui-Jing Tang,Qihuang Gong,Bei-Bei Li,Qi-Fan Yang
{"title":"Power-efficient ultra-broadband soliton microcombs in resonantly-coupled microresonators.","authors":"Kaixuan Zhu,Xinrui Luo,Yuanlei Wang,Ze Wang,Tianyu Xu,Du Qian,Yinke Cheng,Junqi Wang,Haoyang Luo,Yanwu Liu,Xing Jin,Zhenyu Xie,Xin Zhou,Min Wang,Jian-Fei Liu,Xuening Cao,Ting Wang,Shui-Jing Tang,Qihuang Gong,Bei-Bei Li,Qi-Fan Yang","doi":"10.1038/s41377-026-02186-9","DOIUrl":"https://doi.org/10.1038/s41377-026-02186-9","url":null,"abstract":"The drive to miniaturize optical frequency combs for practical deployment has spotlighted microresonator solitons as a promising chip-scale candidate. However, these soliton microcombs could be very power-hungry when their span increases, especially with fine comb spacings. As a result, realizing an octave-spanning comb at microwave repetition rates for direct optical-microwave linkage is considered not possible for photonic integration due to the high power requirements. Here, we introduce the concept of resonant-coupling to soliton microcombs to reduce pump consumption significantly. Compared to conventional waveguide-coupled designs, we demonstrate (i) a threefold increase in spectral span for high-power combs and (ii) up to a tenfold reduction in repetition frequency for octave-spanning operation. This configuration is compatible with laser integration and yields reliable, turnkey soliton generation. By eliminating the long-standing pump-power bottleneck, microcombs will soon become readily available for portable optical clocks, massively parallel data links, and field-deployable spectrometers.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":"21 9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147536511","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
Intrinsically stretchable organic light-emitting-diode with high brightness and stretchability via elastic-microphase-engineered emitter and dual-embedded electrode 采用弹性微相工程发射极和双嵌套电极制成具有高亮度和可拉伸性的固有可拉伸有机发光二极管
Light-Science & Applications Pub Date : 2026-03-25 DOI: 10.1038/s41377-026-02271-z
Zhen Lu, Jiaming Huang, Qiong Liang, Kuan Liu, Dongyang Li, Jiayuan Zhu, Cenqi Yan, Yaokang Zhang, Heng Liu, Xinhui Lu, Jianjun Tian, Zi Jing Wong, Gang Li
{"title":"Intrinsically stretchable organic light-emitting-diode with high brightness and stretchability via elastic-microphase-engineered emitter and dual-embedded electrode","authors":"Zhen Lu, Jiaming Huang, Qiong Liang, Kuan Liu, Dongyang Li, Jiayuan Zhu, Cenqi Yan, Yaokang Zhang, Heng Liu, Xinhui Lu, Jianjun Tian, Zi Jing Wong, Gang Li","doi":"10.1038/s41377-026-02271-z","DOIUrl":"https://doi.org/10.1038/s41377-026-02271-z","url":null,"abstract":"Intrinsically stretchable organic light-emitting diodes (is-OLEDs), composed entirely of inherently stretchable functional layers, represent a promising enabling technology for wearable electronics due to stretching and deformation endurance during the dynamic movements of the human body. However, achieving high performance and stretchability is challenging due to limited ductility in conjugated emissive materials and the low quality of stretchable transparent electrodes (STEs). In this study, we explore an elastic-microphase-engineered emissive layer strategy for is-OLEDs. This involves investigating the effects of incorporating different styrene-butadiene-styrene block copolymer derivative elastomers into a green polyfluorene emissive polymer. The miscibility between elastomers and emissive polymers is found to be critical in regulating three-dimensional microphase separation in the blend, thus simultaneously affecting mechanical and optoelectronic properties. In addition, by pre-burying conductive polymer PH1000, the smoothed dual-embedded hybrid electrode PH1000@AgNWs@TPU (PAT) STE with superior conductivity, stretchability, and stability is achieved. As a result, the obtained is-OLED demonstrated a record luminance of 33,443 cd m−2 and stretchability up to 120%, while also maintaining approximately 90% of its initial luminance after 100 cycles of dynamic stretching at 15% strain, representing a significant stride towards realizing the full potential of is-OLEDs for next-generation wearable electronic applications.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147506117","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
Boltzmann luminescent nanothermometry: mechanistic criteria and predictive design of thermally coupled levels 玻尔兹曼发光纳米测热:热耦合水平的机制准则和预测设计
Light-Science & Applications Pub Date : 2026-03-24 DOI: 10.1038/s41377-026-02260-2
Kejie Li, Jiaqi Zhao, Mochen Jia, Dongxu Guo, Ruiying Lu, Zhiying Wang, Zuoling Fu
{"title":"Boltzmann luminescent nanothermometry: mechanistic criteria and predictive design of thermally coupled levels","authors":"Kejie Li, Jiaqi Zhao, Mochen Jia, Dongxu Guo, Ruiying Lu, Zhiying Wang, Zuoling Fu","doi":"10.1038/s41377-026-02260-2","DOIUrl":"https://doi.org/10.1038/s41377-026-02260-2","url":null,"abstract":"Boltzmann-type luminescent nanothermometry using thermally coupled levels (TCLs) of lanthanide ions is promising for applications in nanotechnology, biomedicine, and aerospace. However, the fundamental rules governing TCLs formation and the reliable prediction of relative sensitivity (Sr) in specific hosts remain unclear. Here, we develop a population-dynamics framework that quantitatively defines the onset temperature and the thermal coupling window for Boltzmann behavior, dictated by nonradiative rates and the thermalization energy gap (ΔE). Mechanistic analysis reveals how adjacent levels disturb the balance between thermal population and multi-phonon relaxation, and establishes a practical stability criterion: robust coupling occurs when the nearest lower level lies beyond 2ΔE. To enable predictive thermometric design, we introduce a splitting factor that correlates macroscopic Sr with microscopic chemical bond parameters. Leveraging two TCLs pairs, we further demonstrate ultrathin, flexible thermosensing patches with high brightness and Sr up to 6.17% K−1, enabling real-time in situ temperature mapping during reactions. This work provides physics-based guidelines for the rational design of high-precision luminescent nanothermometers.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147506118","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
Compact and programmable large-scale optical processor in free space. 自由空间中紧凑可编程的大型光学处理器。
Light-Science & Applications Pub Date : 2026-03-19 DOI: 10.1038/s41377-026-02236-2
Maria Gorizia Ammendola,Nazanin Dehghan,Lukas Scarfe,Alessio D'Errico,Francesco Di Colandrea,Ebrahim Karimi,Filippo Cardano
{"title":"Compact and programmable large-scale optical processor in free space.","authors":"Maria Gorizia Ammendola,Nazanin Dehghan,Lukas Scarfe,Alessio D'Errico,Francesco Di Colandrea,Ebrahim Karimi,Filippo Cardano","doi":"10.1038/s41377-026-02236-2","DOIUrl":"https://doi.org/10.1038/s41377-026-02236-2","url":null,"abstract":"Photonic circuits are central to classical and quantum information processing. While integrated technologies dominate, free-space architectures are emerging as attractive alternatives, offering broad bandwidth and direct manipulation of optical modes without confinement in waveguides. A key challenge for scalability lies in circuit depth, as the number of layers manipulating the optical field typically grows with the system size. Here, we introduce a programmable free-space photonic platform that implements translation-invariant, high-dimensional unitary transformations using only three layers. Information is encoded in structured light modes defined by circular polarization and quantized transverse momenta, and processed with spatial light modulators interleaved with half-wave plates. We implement unitaries that are equivalent to quantum walks over up to 30 time steps, in one- and two-dimensional lattices, distributing a single input mode across more than 7,000 outputs, where conventional approaches would require tens or hundreds of layers. The platform supports diverse quantum walk dynamics, including disorder, synthetic gauge fields, and topological effects, previously explored only in separate experiments. Using coincidence detection with a time-tagging camera, we show compatibility with quantum optics protocols and provide examples of quantum walks of heralded single photons. These results contribute to establishing free-space optical processors as promising resources for high-dimensional quantum simulation and scalable optical information processing.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":"85 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147483750","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
Single-pulse lithography of amorphous photonic architectures inside all-inorganic dielectric crystals. 全无机介电晶体内非晶光子结构的单脉冲光刻。
Light-Science & Applications Pub Date : 2026-03-18 DOI: 10.1038/s41377-026-02253-1
Zhuo Wang,Rongze Ma,Han Lin,Pengfei Zhang,Yu Lu,Feng Chen,Baohua Jia,Bo Zhang,Jianrong Qiu
{"title":"Single-pulse lithography of amorphous photonic architectures inside all-inorganic dielectric crystals.","authors":"Zhuo Wang,Rongze Ma,Han Lin,Pengfei Zhang,Yu Lu,Feng Chen,Baohua Jia,Bo Zhang,Jianrong Qiu","doi":"10.1038/s41377-026-02253-1","DOIUrl":"https://doi.org/10.1038/s41377-026-02253-1","url":null,"abstract":"High-efficiency light modulation within transparent substrates is critically important for advancing in-chip integrated optical technologies. However, current micro/nanophotonic platforms primarily rely on 2D surface configurations, rendering them inadequate for 3D optical design in dielectric environments. Here, we introduce a precise phase-transition technique that enables the direct lithography of highly regular amorphous units in multiple transparent dielectric crystals (lithium niobates, quartz, yttrium vanadate, etc.). This unit can be rapidly written with a single ultrafast laser pulse, exhibiting a high-purity amorphization phase transition interior structure and a regular sheet-like anisotropic spatial morphology (aspect ratio reaching 190:1). We reveal that this amorphization stems from ultrafast laser-driven anisotropic thermal deposition, achieved through the synergy of the light-induced high-density free electrons and thermal effects. Such embedded units achieve more than an order of magnitude improvement in the efficiency of nonlinear beam shaping (~3% second harmonic and ~0.1% third harmonic) and offer multiple degrees of freedom for device design. This study establishes a versatile platform for on-demand production of all-dielectric micro/nanophotonic architectures in the free space of transparent dielectrics, unlocking new avenues for 3D integrated photonics.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":"234 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147471748","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
Organic small-molecule NIR-II fluorophores for tumor phototheranostics. 用于肿瘤光疗的有机小分子NIR-II荧光团。
Light-Science & Applications Pub Date : 2026-03-16 DOI: 10.1038/s41377-026-02212-w
Dan Xiang,Zhichao Wang,Hongwei Zheng,Yuqi Tang,Quan Li
{"title":"Organic small-molecule NIR-II fluorophores for tumor phototheranostics.","authors":"Dan Xiang,Zhichao Wang,Hongwei Zheng,Yuqi Tang,Quan Li","doi":"10.1038/s41377-026-02212-w","DOIUrl":"https://doi.org/10.1038/s41377-026-02212-w","url":null,"abstract":"Near-infrared II (NIR-II) fluorophores possess transformative potential for biomedical applications, owing to their deep-tissue penetration, reduced tissue autofluorescence, and low phototoxicity. Recent breakthroughs in molecular engineering have accelerated the development of NIR-II organic small-molecule fluorophores based on versatile scaffolds, including cyanine, boron dipyrromethene, benzobisthiadiazole, xanthene, cyano-based derivatives, and small-molecule metal complexes. This review systematically summarizes the molecular engineering strategies, photophysical properties, and structure-function relationships of NIR-II fluorophores in the last five years. We highlight recent breakthroughs in their theranostic applications, including high-resolution deep-tissue imaging and efficient phototherapeutic modalities such as photodynamic and photothermal therapy. Finally, we present forward-looking perspectives on current challenges and emerging opportunities, aiming to provide insights for promoting continued innovation and clinical translation in this rapidly advancing field.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":"44 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147465574","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
45 km ROTDR with 0.5 m/0.11 °C via complex-domain square-wave width-chirp pulse compression 45公里ROTDR, 0.5米/0.11°C,通过复域方波宽度啁啾脉冲压缩
Light-Science & Applications Pub Date : 2026-03-16 DOI: 10.1038/s41377-026-02245-1
Bowen Fan, Jian Li, Xinyue Zhang, Lulei Li, Rilong Wang, Jianzhong Zhang, Mingjiang Zhang
{"title":"45 km ROTDR with 0.5 m/0.11 °C via complex-domain square-wave width-chirp pulse compression","authors":"Bowen Fan, Jian Li, Xinyue Zhang, Lulei Li, Rilong Wang, Jianzhong Zhang, Mingjiang Zhang","doi":"10.1038/s41377-026-02245-1","DOIUrl":"https://doi.org/10.1038/s41377-026-02245-1","url":null,"abstract":"Raman optical time-domain reflectometry (ROTDR) inherently balances sensing range, spatial resolution, and temperature accuracy through the pulse duration dictated by the OTDR position principle. However, optimizing one metric conventionally degrades the others, forming a theoretical trade-off. This work introduces complex-domain square-wave width-chirp pulse compression to break that physical limitation. The steep edges and rich high-order harmonics of complex-domain square-wave width-chirp pulse undergo matched filtering, producing a compressed δ-pulse whose full width at half maximum, rather than the original pulse duration, now governs sensing spatial resolution. Complex-domain matched filtering, implemented via a conjugate time-reversal filter, achieves a 15.09 dB gain in signal-to-noise ratio, while the complex-domain envelope extraction method isolates and removes Raman phase noise. The proposed scheme simultaneously achieves 45 km sensing distance, 0.5 m spatial resolution, and 0.11 °C temperature accuracy, demonstrating complete decoupling of these metrics from the pulse duration. The proposed framework offers a new paradigm for long-range, high-precision distributed temperature sensing and is extensible to Brillouin and Rayleigh scattering systems.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147465637","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
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