Laser & Photonics Reviews最新文献

{"title":"Boosting Single-Photon Extraction Efficiency in GaN Through Radiative Mode Conversion","authors":"Kee Suk Hong, Hee-Jin Lim, Young-Ho Ko, Kap-Joong Kim, Junhee Lee, Jung-Hoon Song, Seong-Han Kim, Junho Choi, Sun-Goo Lee, Wook-Jae Lee","doi":"10.1002/lpor.202401966","DOIUrl":"https://doi.org/10.1002/lpor.202401966","url":null,"abstract":"Highly stable and bright single-photon emitters at room temperature are fundamental components of quantum information technologies, which support advanced applications such as quantum computing, quantum communication, and quantum sensing. A key challenge in realizing these technologies is the creation of efficient single-photon sources capable of emitting across a broad spectral range. While defect-based materials such as diamond, SiC, 2D materials and III-nitrides show significant promise, broadband single-photon extraction remains a considerable obstacle, often restricted to narrow emission bands through the use of resonant cavities. In this work, a novel approach is introduced to enhance the broadband extraction efficiency of single photons from GaN, a versatile III-nitride material. By directly patterning circular Bragg gratings with partially etched trenches onto the GaN surface, efficient radiation mode conversion, boosting single-photon extraction over a wide spectral bandwidth, is achieved. Crucially, this method eliminates the need for resonant cavities, which rely on precise period control through photolithography to achieve narrow bandwidth resonant modes, thereby supporting efficient extraction from various randomly distributed defects across a broad spectral range. This approach represents a major improvement over previous techniques by offering a practical solution for broadband single-photon extraction from GaN and opening new possibilities for versatile quantum technologies.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"4 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143385819","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}

{"title":"Pressure‐Promoted Self‐Trapped Exciton Emission and White‐Light Harvesting in Lead Halide Metal–Organic Frameworks at Ambient Conditions","authors":"Yunfeng Yang, Xiaohui Zhao, Jiaju Liang, Qing Yang, Ting Zhang, Yixuan Wang, Xinyi Yang, Bo Zou","doi":"10.1002/lpor.202401961","DOIUrl":"https://doi.org/10.1002/lpor.202401961","url":null,"abstract":"Lead halide metal−organic frameworks (MOFs) possess unique advantages in preparing single‐component white‐light‐emitting (WLE) materials due to their broadband emission based on self‐trapping excitons (STEs). However, in order to obtain high‐quality white light emission, challenges remain in adjusting and optimizing the color temperature and color coordinates of broadband STE emission. Herein, we have achieved tunable color emission and high‐quality white light emission with Commission International de l'Eclairage coordinates of (0.32, 0.38) and color temperature of 5777 K at ambient conditions in TMOF‐8(Cl) through pressure treatment. The irreversible lattice distortion after pressure treatment reduces the distance between [PbCl]<jats:sup>+</jats:sup> unit and TDC<jats:sup>2−</jats:sup> unit. The enhanced hydrogen bonding interactions and electronic coupling between the Pb‐<jats:italic>s</jats:italic> orbitals and ligand energy levels turn on the charge transfer (CT) channel from [PbCl]<jats:sup>+</jats:sup> unit to TDC<jats:sup>2−</jats:sup> unit. Adjusting the degree of lattice distortion can achieve the regulation of the relative intensity of STE and CT emission, thereby obtaining tunable color emission and high‐quality white light emission. This study provides a new perspective on the modulation of broadband STE emission in MOFs materials and a new platform for the development of high‐quality single‐component WLE materials.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"9 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143371555","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}

{"title":"Digital Holography Interferometry for Refractive Index Characterization and Temperature Mapping of Aqueous Solutions at Supercooled Temperatures","authors":"Crysthal Alvarez, Balaji Baskar, Carla Berrospe-Rodriguez, Soheil Kavian, Ronald Sellers, Matthew J. Powell-Palm, Guillermo Aguilar","doi":"10.1002/lpor.202400921","DOIUrl":"https://doi.org/10.1002/lpor.202400921","url":null,"abstract":"Cryopreservation of biological matter nigh-universally requires cooling organic aqueous solutions through the metastable supercooled temperature regime. However, for many solutions of interest, very little thermophysical data exists at these temperatures, hampering the meaningful design of cryopreservation protocols or interrogation of cryopreservation processes. Digital holography interferometry (DHI) has recently emerged as a promising technique for measuring and characterizing the physical properties of liquids. Herein, DHI is proposed as a thermal imaging and characterization tool capable of measuring optical properties, such as temperature-dependent refractive index, and providing high-resolution two-dimensional (2D) visualization of temperature distribution in the supercooling regime. This approach overcomes the limitations of traditional techniques such as thermocouples and thermal cameras. This work describes a DHI platform instrumented with a custom thermoelectric supercooling apparatus, demonstrates 2D temperature mapping in the supercooled regime, and measures the refractive index of water, 10% dimethyl sulfoxide (DMSO), and 49% DMSO solutions at sub-273 K temperatures. Overall, DHI is demonstrated as a noninvasive optical tool with high resolution for studying supercooled liquids, potentially enhancing cryopreservation protocols and providing new thermo-optical information on cryoprotective agents at sub-273 K temperatures.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"12 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143371680","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}

{"title":"Near-Unity Internal Quantum Efficiency and High Thermal Stability of Sr3MgGe5O14: Cr3+ Phosphor for Plant Growth","authors":"Qiuming Lin, Xiaozhong Wu, Jiaqing Peng, Weixiong You, Xinyu Ye, Decai Huang","doi":"10.1002/lpor.202402047","DOIUrl":"https://doi.org/10.1002/lpor.202402047","url":null,"abstract":"Near-infrared phosphor-converted light-emitting diodes (NIR pc-LEDs) are regarded one of the most promising light sources for food analysis, plant growth, bioimaging, night vision, and so on. Cr³⁺-activated NIR phosphors have garnered increasing attention due to their exceptional photoluminescence properties for NIR pc-LED. However, most of them suffer from poor thermal stability or low efficiency which limits their large-scale application. Herein, a novel Sr₃MgGe₅O₁₄: Cr³⁺ (SMGO: Cr³⁺) NIR phosphor is presented, which exhibits a broadband NIR emission ranging the range of 650–1000 nm with a peak at 735 nm. SMGO: 0.005Cr³⁺ phosphor demonstrates an almost near-unity internal quantum efficiency (99.4%) and excellent thermal quenching performance (<i>I_{423 K}/I_{298 K}</i> = 86%). First-principles theory calculation indicates that Cr³⁺ ions preferentially occupy the [Ge2/MgO₄] and [Ge3O₄] sites at high doping concentration within the SMGO host, illustrating the concentration quenching mechanism. Furthermore, a NIR pc-LED is manufactured by utilizing SMGO: 0.005Cr³⁺ with a 445 nm blue LED chip, and the NIR output power is 140.5 mW with a photoelectric conversion efficiency of 15.5% at 300 mA. Potential applications of plant growth and the detection of several mental ions are also demonstrated, which demostrates its promising application in plant growth.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"1 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143371683","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}

{"title":"Enhanced Near-Infrared Photodetection in a Mixed-Dimensional 0D/2D Heterostructure via Two-Photon Absorption","authors":"Kan Liao, Ke Ding, Si Li, Xu Zhang, Yanfeng Bi, Chunfeng Zhang, Fengrui Hu, Lin Wang, Min Xiao, Xiaoyong Wang","doi":"10.1002/lpor.202401352","DOIUrl":"https://doi.org/10.1002/lpor.202401352","url":null,"abstract":"The perovskite nanocrystals (NCs) are featured with a strong two-photon absorption (TPA) due to the quantum-confinement effect, but suffer from a short transport distance of the photogenerated charge carriers isolated within the 0D spatial volumes. On the other hand, the 2D semiconductors of transition metal dichalcogenide (TMDC) possess a large carrier transport mobility across the homogeneous monolayer, whose atomic-scale thickness results in too poor an absorption capability to accommodate plentiful charge carriers upon light illumination. Here a solid film of the perovskite CsPbBr₃ NCs is deposited on top of a TMDC WSe₂ monolayer to form a mixed-dimensional 0D/2D heterostructure, whose charge-transfer interaction is facilitated by the type-II band alignment between the two composing materials. According to the ultrafast transient reflection measurements, the photogenerated holes in the CsPbBr₃ NCs can migrate into the WSe₂ monolayer within ≈800 fs to yield the current flow in a photodetector fabricated out of this 0D/2D heterostructure. When the CsPbBr₃ NCs are excited at the TPA wavelength of ≈1015 nm corresponding to the resonant bandgap transition, a responsivity of ≈7.5 × 10⁻⁵ A W⁻¹ is achieved that is the highest among all the currently-available values from the various photodetectors operated under the TPA conditions.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"79 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143371682","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}

{"title":"Managing Surface Reconstruction Enables Bright, Stable, and Cost-Performance Perovskite Light-Emitting Diodes","authors":"Yanyu Deng, Zhiguo Zhang, Guanhua Ren, Wenwen Liu, Zhuowei Li, Chunyu Liu, Zhiqi Li, Wenbin Guo","doi":"10.1002/lpor.202401817","DOIUrl":"https://doi.org/10.1002/lpor.202401817","url":null,"abstract":"Organic–inorganic hybrid perovskite is emerging as one of the most promising light source technologies. Various interfacial agents have been widely used on perovskite surfaces, aiming to achieve high brightness and stability in perovskite light-emitting diodes (PeLEDs) by eliminating the adverse effects of excess organic halide residues. However, there are only scattered reports available on the unreacted halide distribution, interfacial solvent effect, and cost-performance for surface engineering, calling for low-cost strategies to address these challenges. Here, the distribution of unreacted halide species is visualized and the effect of solvent-dominated surface reconstruction on performance is pointed. Experimental and computational studies reveal that the surface lattice distortion caused by the interaction between solvents and crystals increases non-radiative losses, thus deteriorating device performance. By managing surface reconstruction using a low-cost mixture-solvent surface reconstruction strategy, cost-effective PeLEDs is obtained with a high radiance of 1103.31 W sr⁻¹ m⁻² and an extended lifetime of 84.8 h operated at a current density of 100 mA cm⁻², representing the highest brightness for FAPbI₃-based PeLEDs.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"12 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143371681","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}

{"title":"Detection of Human Cervical Cancer by Probe-Based Quantitative Optical Coherence Tomography","authors":"Tao Han, Shuhao Qian, Jia Meng, Lingxi Zhou, Gangqin Xi, Lu Yang, Lingmei Chen, Ling Zhang, Rushan Jiang, Chuncheng Wang, Bo Niu, Soumitra Satapathi, Jin Zhang, Chao He, Ke Sun, Shuangmu Zhuo, Zhihua Ding, Zhiyi Liu","doi":"10.1002/lpor.202401479","DOIUrl":"https://doi.org/10.1002/lpor.202401479","url":null,"abstract":"Most cervical cancers develop from squamous cells in the exocervix followed by stromal invasion, which alters the organization and morphology of collagen fibers. Therefore, morpho-structural remodeling of collagen fibers is closely associated with cancer progression. Collagen-based cancer detection requires not only techniques capable of qualified large-depth imaging but also computational sensitivity to extract subtle changes. Here, optical coherence tomography (OCT) is applied to collagen fibers in the exocervix. High-quality imaging into deep stroma is guaranteed by an all-fiber probe designed to have an extended depth of focus through the formation of the quasi-Bessel focusing beam. Collagen fibers provide dominant scattering signals in OCT images, and volume information is utilized to establish an optical biomarker reflecting variation gradient in fiber alignment and crimping. Detection of cervical cancer with a multi-parametric method is then evaluated by ex vivo imaging of human specimens and in vivo imaging of a murine model harboring human cervical cancer. Finally, the tumor potential index (TPI) is proposed by merging multiple metrics. The TPI map provides an intuitive illustration of cancer risk, which may guide clinicians more accurately to the correct location for biopsy.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"79 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143258683","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}

{"title":"Silicon-Integrated Perovskite Photonic Laser Based on Bound States in Continuum","authors":"Zhiyuan Gu, Hao Gu, Nan Zhang, Sen Jiang, Gang Wang, Yulin Mao, Jinfeng Liao, Shengchun Yang, Chao Liang, Guichuan Xing","doi":"10.1002/lpor.202401327","DOIUrl":"https://doi.org/10.1002/lpor.202401327","url":null,"abstract":"On-chip light sources are essential in modern technology, serving a broad range of applications, from sensing to display and communication. Lead halide perovskites, a new class of ionic semiconductors with excellent optical and optoelectronic properties, as well as solution processability, hold great potential in achieving coherent light sources. Compared to costly III-V-based compound semiconductor on-chip lasers with threading dislocation, perovskite with high defect-tolerance offers decisive advantages for flexible, cost-effective, and massive deposition on arbitrary substrates. Despite the success of numerous perovskite lasers, true on-chip integration, i.e., monolithic integration on silicon platforms, remains very little explored. Physically, light confinement by perovskite structures on silicon is unlikely due to substantial energy leakage into the silicon substrate. Herein, to address this bottleneck, the study presents the experimental realization of perovskite microlasers on silicon chips operating at visible and near-infrared frequencies, utilizing bound states in the continuum (BICs) to suppress intrinsic light leakage. Using a top-down focused ion beam nanofabrication technique, perovskite microdisks are fabricated with ultrasmooth sidewalls. A high laser quality factor of 4850 is observed at a wavelength of approximately 822 nm. The simple but rational integration solutions proposed here pave the way for the dense incorporation of perovskite laser sources into on-chip photonic circuits, supporting the development of perovskite nanophotonics and their integration with microelectronic platforms.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"12 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143192531","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}

{"title":"Bright Heralded Single-Photon Source Saturating Theoretical Single-photon Purity","authors":"Haoyang Wang, Huihong Yuan, Qiang Zeng, Lai Zhou, Haiqiang Ma, Zhiliang Yuan","doi":"10.1002/lpor.202401420","DOIUrl":"https://doi.org/10.1002/lpor.202401420","url":null,"abstract":"Single-photon source is the cornerstone for modern quantum information processing. The present work derives the theoretical limit of single-photon purity for general parametric heralded single-photon &lt;b&gt;sources&lt;/b&gt;, and subsequently demonstrates a bright, gigahertz-pulsed heralded source with the purity saturating the limit. By stimulating spontaneous four-wave mixing effect in the silicon spiral waveguide, this on-chip source is measured to have a coincidence rate exceeding 1.5 MHz at a coincidence-to-accidental ratio (CAR) of 16.77 in the photon pair correlation experiment. The single-photon purity of this source, quantified by the heralded auto-correlation function &lt;span data-altimg=\"/cms/asset/aa70dc6b-4f03-4411-8712-9a91328311c6/lpor202401420-math-0001.png\"&gt;&lt;/span&gt;&lt;mjx-container ctxtmenu_counter=\"3\" ctxtmenu_oldtabindex=\"1\" jax=\"CHTML\" role=\"application\" sre-explorer- style=\"font-size: 103%; position: relative;\" tabindex=\"0\"&gt;&lt;mjx-math aria-hidden=\"true\" location=\"graphic/lpor202401420-math-0001.png\"&gt;&lt;mjx-semantics&gt;&lt;mjx-mrow data-semantic-annotation=\"clearspeak:simple\" data-semantic-children=\"7,11\" data-semantic-content=\"12,0\" data-semantic- data-semantic-role=\"simple function\" data-semantic-speech=\"g Subscript normal h Superscript left parenthesis 2 right parenthesis Baseline left parenthesis 0 right parenthesis\" data-semantic-type=\"appl\"&gt;&lt;mjx-msubsup data-semantic-children=\"0,1,5\" data-semantic-collapsed=\"(7 (6 0 1) 5)\" data-semantic- data-semantic-parent=\"13\" data-semantic-role=\"simple function\" data-semantic-type=\"subsup\"&gt;&lt;mjx-mi data-semantic-annotation=\"clearspeak:simple\" data-semantic-font=\"italic\" data-semantic- data-semantic-operator=\"appl\" data-semantic-parent=\"7\" data-semantic-role=\"simple function\" data-semantic-type=\"identifier\"&gt;&lt;mjx-c&gt;&lt;/mjx-c&gt;&lt;/mjx-mi&gt;&lt;mjx-script style=\"vertical-align: -0.317em; margin-left: 0px;\"&gt;&lt;mjx-mrow data-semantic-children=\"3\" data-semantic-content=\"2,4\" data-semantic- data-semantic-parent=\"7\" data-semantic-role=\"leftright\" data-semantic-type=\"fenced\" size=\"s\"&gt;&lt;mjx-mo data-semantic- data-semantic-operator=\"fenced\" data-semantic-parent=\"5\" data-semantic-role=\"open\" data-semantic-type=\"fence\"&gt;&lt;mjx-c&gt;&lt;/mjx-c&gt;&lt;/mjx-mo&gt;&lt;mjx-mn data-semantic-annotation=\"clearspeak:simple\" data-semantic-font=\"normal\" data-semantic- data-semantic-parent=\"5\" data-semantic-role=\"integer\" data-semantic-type=\"number\"&gt;&lt;mjx-c&gt;&lt;/mjx-c&gt;&lt;/mjx-mn&gt;&lt;mjx-mo data-semantic- data-semantic-operator=\"fenced\" data-semantic-parent=\"5\" data-semantic-role=\"close\" data-semantic-type=\"fence\"&gt;&lt;mjx-c&gt;&lt;/mjx-c&gt;&lt;/mjx-mo&gt;&lt;/mjx-mrow&gt;&lt;mjx-spacer style=\"margin-top: 0.18em;\"&gt;&lt;/mjx-spacer&gt;&lt;mjx-mi data-semantic-annotation=\"clearspeak:simple\" data-semantic-font=\"normal\" data-semantic- data-semantic-parent=\"7\" data-semantic-role=\"latinletter\" data-semantic-type=\"identifier\" size=\"s\"&gt;&lt;mjx-c&gt;&lt;/mjx-c&gt;&lt;/mjx-mi&gt;&lt;/mjx-script&gt;&lt;/mjx-msubsup&gt;&lt;mjx-mo data-semantic-added=\"true\" data-semantic- data-semantic-operator=\"appl\" data-semantic-parent=\"13\" data-semantic-role=\"applicatio","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"55 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143192544","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}

{"title":"3D Characterization of Spatiotemporally Coupled High Harmonic Attosecond Pulses","authors":"Mingdong Yan, Yaodan Hu, Zijuan Wei, Zhengyan Li","doi":"10.1002/lpor.202401675","DOIUrl":"https://doi.org/10.1002/lpor.202401675","url":null,"abstract":"Manipulation of ultrafast laser fields across the temporal, spatial, and spectral domains can result in a spatiotemporally coupled structure of light, which cannot be mathematically decomposed into the product of spatial and temporal profiles. However, this spatiotemporal coupling effect may degrade the focusability of ultrafast laser pulses at large-scale laser facilities. As ultrafast science has advanced from femtosecond to attosecond time scales, coherent attosecond optical pulses have become accessible through high harmonic generation, an extremely nonlinear optical process that produces an enhanced spatiotemporal coupling effect. Limited studies have explored the spatiotemporal coupling of high harmonic attosecond pulses owing to the lack of 3D characterization of attosecond optical fields. This study addresses this limitation by providing a 3D characterizing of the spatiotemporal optical field profiles of high harmonic attosecond pulses and investigating their physical spatiotemporal coupling effects. The spatiotemporal coupling of high harmonic attosecond pulses is quantitatively evaluated via a newly defined parameter that incorporates phase contributions in the time-space domain, which may likely correlate with the inhomogeneous intrinsic atomic dipole phase determined by the driving laser intensity. This physical insight, combined with the 3D optical field metrology, can potentially benefit extreme UV nonlinear optics and attosecond dynamic imaging.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"22 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143258684","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}