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Ultraviolet supercontinuum generation using a differentially-pumped integrated glass chip 利用差分泵浦集成玻璃芯片产生紫外超连续真空
IF 3.8 Q1 Engineering Pub Date : 2024-03-07 DOI: 10.1088/2515-7647/ad2bd3
Vincent Wanie, Pasquale Barbato, Josina Hahne, Sergey Ryabchuk, Ammar Bin Wahid, David Amorim, Erik P Månsson, Andrea Trabattoni, Roberto Osellame, Rebeca Martínez Vázquez, Francesca Calegari
We investigate the generation of ultrabroadband femtosecond ultraviolet (UV) radiation via third-order harmonic generation in highly confined gas media. A dual-stage differential-pumping scheme integrated into a glass microfluidic chip provides an exceptional gas confinement up to several bar and allows the apparatus to be operated under high-vacuum environment. UV pulses are generated both in argon and neon with up to ∼0.8 μJ energy and 0.2% conversion efficiency for spectra that cover the UVB and UVC regions between 200 and 325 nm. Numerical simulations based on the unidirectional pulse propagation equation reveal that ionization plays a critical role for extending the spectral bandwidth of the generated third-harmonic pulse beyond the tripled 800 nm driving laser pulse bandwidth. By delivering UV supercontinua supporting Fourier transform limits below 2 fs, as well as comparable pulse energies with respect to capillary-based techniques that typically provide high spectral tunability but produce narrower bandwidths, our compact device makes a step forward towards the production and application of sub-fs UV pulses for the investigation of electron dynamics in neutral molecules.
我们研究了在高度封闭的气体介质中通过三阶谐波生成超宽带飞秒紫外线(UV)辐射的问题。集成在玻璃微流控芯片中的双级差分泵方案提供了高达数巴的超强气体封闭性,并使仪器能够在高真空环境下运行。在氩气和氖气中产生的紫外线脉冲能量高达 ∼ 0.8 μJ,转换效率为 0.2%,光谱范围覆盖 200 至 325 nm 的 UVB 和 UVC 区域。基于单向脉冲传播方程的数值模拟显示,电离在将所产生的三次谐波脉冲的光谱带宽扩展到三倍 800 nm 驱动激光脉冲带宽之外方面起着关键作用。通过提供支持低于 2 fs 傅立叶变换极限的紫外超连续波,以及与通常提供高光谱可调谐性但产生较窄带宽的基于毛细管的技术相当的脉冲能量,我们的紧凑型设备在生产和应用亚 fs 紫外脉冲以研究中性分子中的电子动力学方面向前迈进了一步。
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引用次数: 0
Surface enhanced infrared absorption mechanism and modification of the plasmonic response 表面增强红外吸收机制与等离子体响应的改变
IF 3.8 Q1 Engineering Pub Date : 2024-02-16 DOI: 10.1088/2515-7647/ad2529
Tanguy Colleu, Adam Fekete, Xavier Gonze, Alexandre Cloots, Vincent Liégeois, Gian-Marco Rignanese, Luc Henrard
Surface enhanced infrared absorption (SEIRA) is an experimental method where trace amount of a compound can be detected with high sensibility. This high detection sensibility is the result of the interaction of the molecules with a localized plasmon, usually from a metallic nanoparticle. In this study we numerically investigate by discrete dipole approximation the origin of the Fano-like response of the system, including the induced transparency when the plasmon resonance and the molecular vibrational mode coincide. The detailed analysis of the localization of the absorption shows that the modification of the absorption cross-section when the molecule is present comes from a change of the plasmonic resonance, not from the direct molecular response which is negligible. This sheds a new light on the SEIRA mechanism. In particular, it demonstrates that the sensibility is associated with the influence of the molecule on the plasmon resonance rather than with the local field enhancement itself.
表面增强红外吸收(SEIRA)是一种可以高灵敏度检测痕量化合物的实验方法。这种高检测灵敏度是分子与局部等离子体(通常来自金属纳米粒子)相互作用的结果。在本研究中,我们通过离散偶极子近似对系统的法诺样响应进行了数值研究,包括等离子体共振与分子振动模式重合时的诱导透明度。对吸收定位的详细分析表明,当分子存在时,吸收截面的改变来自质子共振的变化,而不是直接的分子响应,后者可以忽略不计。这为 SEIRA 机制带来了新的启示。特别是,它证明了灵敏度与分子对等离子共振的影响有关,而不是与局部场增强本身有关。
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引用次数: 0
Unravelling the role of iron and manganese oxides in colouring Late Antique glass by micro-XANES and micro-XRF spectroscopies 通过显微 XANES 和显微 XRF 光谱揭示铁和锰氧化物在晚期古董玻璃着色中的作用
IF 3.8 Q1 Engineering Pub Date : 2024-02-02 DOI: 10.1088/2515-7647/ad2259
Francesca Gherardi, Clément Hole, Ewan Campbell, Marine Cotte, Rachel Tyson, Sarah Paynter
This research aims to understand colouring technologies in 5th–7th centuries glass imported to Atlantic Britain by correlating the iron (Fe) and manganese (Mn) ratios and oxidation states with colour. Despite having a similar matrix chemical composition and concentrations of Fe and Mn oxides, these vessels display different colours (from green to yellow/amber, sometimes with purple streaks). Colour changes can be induced by controlling the reduction-oxidation reactions that occur during glass production, which are influenced by the raw materials, furnace and melt atmosphere, and recycling. To evaluate these parameters, reference glasses were prepared, following the composition of Late Antique archaeological glass recovered from Tintagel (UK) and Whithorn (UK). A corpus of archaeological and experimental glass samples was analysed using bulk Fe and Mn K-edge x-ray absorption near edge structure (XANES) spectroscopy, micro-XANES and micro x-ray fluorescence (μ-XRF) at beamline ID21, at the European Synchrotron Radiation Facility. Fe and Mn XANES spectra of the archaeological glass indicate that Fe and Mn are in a similar oxidation state in all the yellow samples, predominantly Fe3+ and Mn2+. No detectable difference in Mn and Fe oxidation state occurs in the purple streaks compared to the yellow glass bulk but μ-XRF maps of the distribution of Fe and Mn show that Mn is more concentrated in the purple streaks. This indicates that the purple colour of the streaks is mainly due to a higher Mn/Fe ratio and persistence of more oxidised manganese in the purple areas, even though it is difficult to detect. Many archaeological fragments appear pale green in transmitted light but amber in reflected light. XANES studies detected the presence of surface layers where manganese is more oxidised. This layer is believed to scatter transmitted and reflected light differently and might be responsible for the optical features of the archaeological glass.
这项研究旨在通过将铁(Fe)和锰(Mn)的比率和氧化状态与颜色联系起来,了解 5-7 世纪进口到大西洋不列颠的玻璃的着色技术。尽管基质化学成分以及铁和锰氧化物的浓度相似,但这些器皿却呈现出不同的颜色(从绿色到黄色/琥珀色,有时还带有紫色条纹)。玻璃生产过程中发生的还原-氧化反应受原材料、熔炉和熔融气氛以及回收利用的影响,通过控制这些反应可以诱发颜色变化。为了评估这些参数,我们按照从廷塔吉尔(英国)和惠索恩(英国)出土的晚期古代考古玻璃的成分制备了参考玻璃。在欧洲同步辐射设施的 ID21 光束线,使用体铁和锰 K 边 X 射线吸收近缘结构 (XANES) 光谱、微 XANES 和微 X 射线荧光 (μ-XRF) 分析了大量考古和实验玻璃样品。考古玻璃的铁和锰 XANES 光谱表明,所有黄色样品中的铁和锰都处于相似的氧化态,主要是 Fe3+ 和 Mn2+。紫色条纹中的锰和铁的氧化态与黄色玻璃块体中的锰和铁的氧化态相比没有可检测到的差异,但是铁和锰的μ-XRF 分布图显示,锰在紫色条纹中更为集中。这表明,条纹的紫色主要是由于锰/铁比率较高,以及紫色区域持续存在较多氧化锰,尽管很难检测到。许多考古碎片在透射光下呈淡绿色,但在反射光下呈琥珀色。XANES 研究发现了锰氧化程度较高的表层。据信,这一层对透射光和反射光的散射不同,可能是造成考古玻璃光学特征的原因。
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引用次数: 0
Luminance and chromaticity characteristics of different phosphor types in laser lighting 激光照明中不同类型荧光粉的亮度和色度特性
IF 3.8 Q1 Engineering Pub Date : 2024-02-01 DOI: 10.1088/2515-7647/ad2258
Ole Bjarlin Jensen, Xinrong Chen, Jian Xu, Dennis Dan Corell, Carsten Dam-Hansen
Laser lighting is emerging as a viable replacement for other light sources in applications requiring high luminance not achievable with LEDs. Phosphor materials for laser lighting are often optimized in terms of luminous efficiency and/or colorimetric properties, while the light homogeneity is often neglected. We present a thorough investigation of the homogeneity of the chromaticity and the luminance profile for the most common types of phosphors used in laser lighting. We find that the achievable luminance and homogeneity of the light spot depends significantly on the phosphor used to convert the blue laser light to white light. The findings of these investigations will present guidelines for optimal phosphor material parameters to achieve high luminance combined with homogeneous chromaticity.
在需要发光二极管无法达到的高亮度的应用中,激光照明正在成为其他光源的可行替代品。用于激光照明的荧光粉材料通常在发光效率和/或色度特性方面进行优化,而光的均匀性往往被忽视。我们对激光照明中最常用的几种荧光粉的色度和亮度曲线的均匀性进行了深入研究。我们发现,光斑的亮度和均匀性在很大程度上取决于用于将蓝色激光转化为白光的荧光粉。这些研究结果将为实现高亮度和均匀色度的最佳荧光粉材料参数提供指导。
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引用次数: 0
Towards truly sustainable IoT systems: the SUPERIOT project 实现真正可持续的物联网系统:SUPERIOT 项目
IF 3.8 Q1 Engineering Pub Date : 2024-01-23 DOI: 10.1088/2515-7647/ad1c6a
Marcos Katz, Tuomas Paso, Konstantin Mikhaylov, Luis Pessoa, Helder Fontes, Liisa Hakola, Jaakko Leppäniemi, Emanuel Carlos, Guido Dolmans, Julio Rufo, Marcin Drzewiecki, Hazem Sallouha, Bruce Napier, André Branquinho, Kerstin Eder
This paper provides an overview of the SUPERIOT project, an EU SNS JU (Smart Networks and Services Joint Undertaking) initiative focused on developing truly sustainable IoT systems. The SUPERIOT concept is based on a unique holistic approach to sustainability, proactively developing sustainable solutions considering the design, implementation, usage and disposal/reuse stages. The concept exploits radio and optical technologies to provide dual-mode wireless connectivity and dual-mode energy harvesting as well as dual-mode IoT node positioning. The implementation of the IoT nodes or devices will maximize the use of sustainable printed electronics technologies, including printed components, conductive inks and substrates. The paper describes the SUPERIOT concept, covering the key technical approaches to be used, promising scenarios and applications, project goals and demonstrators which will be developed to the proof-of-concept stage. In addition, the paper briefly discusses some important visions on how this technology may be further developed in the future.
本文概述了 SUPERIOT 项目,该项目是欧盟 SNS JU(智能网络与服务联合倡议)的一项倡议,致力于开发真正可持续的物联网系统。SUPERIOT 概念基于独特的可持续发展整体方法,在设计、实施、使用和处置/再利用等阶段积极开发可持续解决方案。该概念利用无线电和光学技术提供双模无线连接、双模能量收集以及双模物联网节点定位。物联网节点或设备的实施将最大限度地利用可持续印刷电子技术,包括印刷组件、导电油墨和基板。本文介绍了 SUPERIOT 概念,包括将采用的关键技术方法、有前景的应用场景和应用、项目目标以及将开发到概念验证阶段的演示器。此外,论文还简要讨论了未来如何进一步开发该技术的一些重要设想。
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引用次数: 0
QPI assay of fibroblasts resilience to adverse effects of nanoGO clusters by multimodal and multiscale microscopy 通过多模态和多尺度显微镜,对成纤维细胞抵御纳米GO团簇不利影响的能力进行 QPI 检测
IF 3.8 Q1 Engineering Pub Date : 2024-01-18 DOI: 10.1088/2515-7647/ad1c6b
Marika Valentino, Daniele Pirone, Jaromir Béhal, Martina Mugnano, Rachele Castaldo, Giuseppe C Lama, Pasquale Memmolo, Lisa Miccio, Vittorio Bianco, Simonetta Grilli, Pietro Ferraro
Graphene is considered a possible drug deliver in nanomedicine for its mechanical, physical and chemical characteristics. Thus, studying graphene biocompatibility is pivotal to contribute to the modern nano-therapy science. The coexistence between cells and graphene should be analysed using non-invasive technologies and thus quantitative phase imaging (QPI) modalities are suitable to investigate the morphometric evolution of cells under nanomaterial exposure. Here, we show how a multimodal QPI approach can furnish a noninvasive analysis for probing the dose-dependent effect of nanoGO clusters on adherent NIH 3T3 fibroblast cells. We rely on both digital holography and Fourier ptychography (FP) in transmission microscopy mode. The former allows accurate time-lapse experiments at the single cell level. The latter provides a wide field of view characterization at the cells network level, thus assuring a significant statistical measurement by exploiting the intrinsic large space-bandwidth product of FP. The combination of these two techniques allows one to extract multimodal information about the cell resilience to adverse effects of nanoGO in the surrounding buffer, namely through quantitative, multi-scale, and time-resolved characterization.
石墨烯因其机械、物理和化学特性而被认为是纳米医学中一种可能的药物输送材料。因此,研究石墨烯的生物相容性对现代纳米疗法科学的发展至关重要。细胞与石墨烯之间的共存应使用非侵入性技术进行分析,因此定量相位成像(QPI)模式适合研究细胞在纳米材料暴露下的形态演变。在这里,我们展示了一种多模态 QPI 方法如何提供无创分析,以探究纳米GO 簇对粘附的 NIH 3T3 成纤维细胞的剂量依赖性影响。我们在透射显微镜模式下同时使用了数字全息摄影和傅立叶层析成像(FP)技术。前者可以在单细胞水平上进行精确的延时实验。后者可在细胞网络层面提供宽视场表征,从而利用 FP 固有的大空间-带宽乘积确保重要的统计测量。将这两种技术结合起来,就能通过定量、多尺度和时间分辨表征,提取细胞对周围缓冲区中纳米有机物不利影响的多模态信息。
{"title":"QPI assay of fibroblasts resilience to adverse effects of nanoGO clusters by multimodal and multiscale microscopy","authors":"Marika Valentino, Daniele Pirone, Jaromir Béhal, Martina Mugnano, Rachele Castaldo, Giuseppe C Lama, Pasquale Memmolo, Lisa Miccio, Vittorio Bianco, Simonetta Grilli, Pietro Ferraro","doi":"10.1088/2515-7647/ad1c6b","DOIUrl":"https://doi.org/10.1088/2515-7647/ad1c6b","url":null,"abstract":"Graphene is considered a possible drug deliver in nanomedicine for its mechanical, physical and chemical characteristics. Thus, studying graphene biocompatibility is pivotal to contribute to the modern nano-therapy science. The coexistence between cells and graphene should be analysed using non-invasive technologies and thus quantitative phase imaging (QPI) modalities are suitable to investigate the morphometric evolution of cells under nanomaterial exposure. Here, we show how a multimodal QPI approach can furnish a noninvasive analysis for probing the dose-dependent effect of nanoGO clusters on adherent NIH 3T3 fibroblast cells. We rely on both digital holography and Fourier ptychography (FP) in transmission microscopy mode. The former allows accurate time-lapse experiments at the single cell level. The latter provides a wide field of view characterization at the cells network level, thus assuring a significant statistical measurement by exploiting the intrinsic large space-bandwidth product of FP. The combination of these two techniques allows one to extract multimodal information about the cell resilience to adverse effects of nanoGO in the surrounding buffer, namely through quantitative, multi-scale, and time-resolved characterization.","PeriodicalId":44008,"journal":{"name":"Journal of Physics-Photonics","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139506549","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
Measurement of ultrashort laser pulses with a time-dependent polarization state using the d-scan technique 利用 d 扫描技术测量随时间变化的偏振态超短激光脉冲
IF 3.8 Q1 Engineering Pub Date : 2024-01-18 DOI: 10.1088/2515-7647/ad1c6c
Daniel Díaz Rivas, Ann-Kathrin Raab, Chen Guo, Anne-Lise Viotti, Ivan Sytcevich, Anne L’Huillier, Cord Arnold
The dispersion scan (d-scan) technique is extended to measurement of the time-dependent polarization state of ultrashort laser pulses. In the simplest implementation for linearly polarized ultrashort pulses, the d-scan technique records the second harmonic generation spectrum as a function of a known spectral phase manipulation. By applying this method to two orthogonally polarized projections of an arbitrary polarized electric field and by measuring the spectrum at an intermediate angle, we can reconstruct the evolution over time of the polarization state. We demonstrate the method by measuring a polarization gate generated from 6fs pulses with a combination of waveplates. The measurements are compared to simulations, showing an excellent agreement.
色散扫描(d-scan)技术扩展用于测量超短激光脉冲随时间变化的偏振状态。在线性偏振超短脉冲的最简单实施中,d-扫描技术将二次谐波生成谱记录为已知光谱相位操纵的函数。通过将这种方法应用于任意极化电场的两个正交极化投影,并在中间角度测量频谱,我们可以重建极化状态随时间的演变。我们通过测量由 6fs 脉冲产生的极化门与波板组合来演示该方法。我们将测量结果与模拟结果进行了比较,结果显示两者非常吻合。
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引用次数: 0
Off-the-shelf optical systems design enabled by an evolution strategy: front stop case 通过演进策略实现现成光学系统设计:前挡案例
IF 3.8 Q1 Engineering Pub Date : 2023-12-07 DOI: 10.1088/2515-7647/ad10b2
Alejandro Madrid-Sánchez, José Ortiz-Ocampo, Carlos Trujillo, Heidi Ottevaere
Commercial off-the-shelf optics enable economic and rapid solutions in the photonics industry and academia. However, the design of optical systems with off-the-shelf optics is a time-consuming task for experienced optical designers and hopeless for novice designers. In this paper, we propose an automatic optical design tool to generate optical systems using only off-the-shelf optical components without human assistance. Our solution is based on an evolution strategy (ES) that performs a discrete combinatorial optimization following optical design-based methodologies that satisfy user-defined specifications. Unlike the conventional methods, the algorithm decreases the design process time and provides optical designers with several optical solutions from where to choose and adapt for targeted applications. In this work, the ES is described and tested with front stop optical configurations. We demonstrate the broad solution domain of the algorithm through the generation of optical systems with F-numbers within a range F/1 to F/90 and field of views up to 300 mm at the image plane. To analyze the solution domain and the characteristics of the solution, we used the design specifications of 29 commercially available scan lenses and compared the performance of different ES parameters. The compatibility of our algorithm with (standard) commercially available optical design software unlocks automatic design tools for off-the-shelf optical systems.
现成的商用光学器件为光子学行业和学术界提供了经济、快速的解决方案。然而,使用现成光学元件设计光学系统对于经验丰富的光学设计人员来说是一项耗时的任务,而对于设计新手来说则毫无希望。在本文中,我们提出了一种自动光学设计工具,只需使用现成的光学元件即可生成光学系统,无需人工辅助。我们的解决方案以进化策略(ES)为基础,按照基于光学设计的方法进行离散组合优化,以满足用户定义的规格要求。与传统方法不同的是,该算法缩短了设计过程的时间,并为光学设计人员提供了多种光学解决方案,供其选择并适应目标应用。在这项工作中,对 ES 进行了描述,并用前挡光学配置进行了测试。我们通过生成 F/1 至 F/90 范围内的 F 数和在像面上最大 300 mm 的视场的光学系统,展示了该算法广泛的解决方案域。为了分析求解域和求解特征,我们使用了 29 个市售扫描镜头的设计规格,并比较了不同 ES 参数的性能。我们的算法与(标准)市售光学设计软件兼容,为现成的光学系统提供了自动设计工具。
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引用次数: 0
Simultaneous nonlinear spectral broadening and temporal contrast enhancement of ultrashort pulses in a multi-pass cell 多通细胞中超短脉冲的同时非线性谱宽和时间对比度增强
Q1 Engineering Pub Date : 2023-11-03 DOI: 10.1088/2515-7647/ad078a
Jaismeen KAUR, Louis Daniault, Zhao Cheng, Oscar Tourneur, Olivier Tcherbakoff, Fabrice Reau, Jean-François Hergott, Rodrigo Lopez-Martens
Abstract We study both numerically and experimentally the use of two third-order nonlinear temporal filtering techniques, namely nonlinear ellipse rotation and cross-polarized wave generation, for simultaneous nonlinear spectral broadening and temporal contrast enhancement of mJ energy, 30 fs titanium:sapphire laser pulses in a multi-pass cell. In both cases, a contrast enhancement greater than 3 orders of magnitude is observed, together with record high conversion efficiencies. Careful balancing of nonlinearity and dispersion inside the multi-pass cell helps tune the spectral broadening process and control the post-compressed pulse duration for specific applications.
利用非线性椭圆旋转和交叉极化两种三阶非线性时间滤波技术,在多通池中对mJ能量30fs的钛蓝宝石激光脉冲进行了非线性光谱展宽和时间对比度增强的数值和实验研究。在这两种情况下,观察到对比度增强超过3个数量级,同时具有创纪录的高转换效率。在多通单元内仔细平衡非线性和色散有助于调整频谱展宽过程并控制特定应用的后压缩脉冲持续时间。
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引用次数: 0
Research of a novel aerodynamic evaluation method for fixed-wing UAV 一种新型固定翼无人机气动性能评价方法的研究
Q1 Engineering Pub Date : 2023-11-01 DOI: 10.1088/1742-6596/2633/1/012001
Yansen Wu, Deshan Liu, Tiancheng Wang, Anmin Zhao
Abstract The aerodynamic parameters of unmanned aerial vehicles (UAVs) play an important role in the newly designed drone. For the purpose of the real-time measurement of the aerodynamic performance parameters of the UAV in flight status, based on the self-development connected-wing configuration airplane, a novel airborne aerodynamics test scheme is researched and verified in this work. The findings of this study indicate that the effectiveness of numerical calculations can be verified by comparison with both results of the numerical simulation and airborne flight test in the same conditions. The newly designed UAV equipped with this test system in the future, not only achieves quick and reliable results of aerodynamic performance and powered system efficiency but also can save the expense of wind tunnel experiments, which is of high potential to the UAV application.
摘要在新型无人机设计中,无人机的气动参数起着至关重要的作用。为了实时测量无人机在飞行状态下的气动性能参数,本文基于自主研制的连接翼构型飞机,研究并验证了一种新的机载空气动力学测试方案。研究结果表明,通过与相同条件下的数值模拟和机载飞行试验结果的对比,可以验证数值计算的有效性。未来新设计的无人机配备该测试系统,不仅可以获得快速可靠的气动性能和动力系统效率测试结果,而且可以节省风洞实验费用,对无人机的应用具有很大的潜力。
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引用次数: 0
期刊
Journal of Physics-Photonics
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