Applied Physics B最新文献_第7页

Detection range adjustable D-shaped photonic crystal fiber plasmonic sensor: a comparative study on materials effect 探测距离可调d形光子晶体光纤等离子体传感器：材料效应的比较研究

IF 2 3区物理与天体物理

Applied Physics B Pub Date : 2025-06-21 DOI: 10.1007/s00340-025-08499-8

Licui Ji, Zihong Zhao, Honggang Pan, Ailing Zhang, Qingcheng You, Yukun Zhu, Rupeng Li, Chunqi Chen

{"title":"Detection range adjustable D-shaped photonic crystal fiber plasmonic sensor: a comparative study on materials effect","authors":"Licui Ji, Zihong Zhao, Honggang Pan, Ailing Zhang, Qingcheng You, Yukun Zhu, Rupeng Li, Chunqi Chen","doi":"10.1007/s00340-025-08499-8","DOIUrl":"10.1007/s00340-025-08499-8","url":null,"abstract":"<div>\u0000 \u0000 In this paper, a high-performance plasmonic surface plasmon resonance (SPR) sensor with adjustable detection range is proposed using Au in combination with TiO2 and Si3N4 as the adhesive layer, respectively. We simulated and compared the effect of two attachment enhancement materials on the performance of the sensor. The results show that for the Au - TiO2 combination, the maximum wavelength sensitivity (WS) is 65,000 nm/RIU at the refractive index (RI) of 1.39–1.40, the wavelength interrogation resolution of 1.54 × 10− 6 RIU, the sensor reaches the amplitude sensitivity (AS) of 2,429 RIU− 1 at RI = 1.34 and the resolution of 4.12 × 10− 6 RIU with amplitude interrogation method, and the RI detection range is 1.34–1.40. For the Au - Si3N4 combination, the maximum WS is 76,000 nm/RIU at RI between 1.39 and 1.40, the resolution of 1.32 × 10− 6 RIU− 1 with wavelength interrogation and the AS is 3,040 RIU− 1 when RI = 1.34, the amplitude interrogation resolution of 3.29 × 10− 6 RIU, and a RI range of 1.40–1.34. The sensor has an ultra-high WS and AS as well as the adjustable detection ranges of 1.31–1.41 and 1.33–1.43 by filling the supporting analyte with certain RI. We also present the fabrication process of the sensor, our sensors show great potential in different scenarios due to its superior performance and easiness of manufacturing.\u0000 </div>","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"131 7","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145144243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

Tuning the electronic and optical properties of graphene quantum dots by vacancy defect with Si-doping: DFT insights 用硅掺杂的空位缺陷调整石墨烯量子点的电子和光学性质：DFT见解

IF 2 3区物理与天体物理

Applied Physics B Pub Date : 2025-06-21 DOI: 10.1007/s00340-025-08512-0

Fouad N. Ajeel, Noora B. Shwayyea, Mustafa K. Salman, Alaa M. Khudhair, Ali Ben Ahmed

{"title":"Tuning the electronic and optical properties of graphene quantum dots by vacancy defect with Si-doping: DFT insights","authors":"Fouad N. Ajeel, Noora B. Shwayyea, Mustafa K. Salman, Alaa M. Khudhair, Ali Ben Ahmed","doi":"10.1007/s00340-025-08512-0","DOIUrl":"10.1007/s00340-025-08512-0","url":null,"abstract":"<div>Graphene quantum dots (GQDs) have emerged as promising candidates for nanoscale optoelectronic and sensing devices due to their tunable electronic properties. However, achieving precise control over their band gap and reactivity remains a challenge. In this study, we employ density functional theory (DFT) calculations to investigate the impact of silicon (Si) doping at three distinct vacancy sites in GQDs. The computational analysis includes frontier molecular orbital (FMO) theory, density of states (DOS), molecular electrostatic potential (MEP), and chemical reactivity descriptors. Our results reveal that Si doping significantly reduces the band gap from 4.10 eV in pristine GQD to 1.63 eV, depending on the doping site. The study demonstrates enhanced charge transfer, localized electronic redistribution, and increased chemical reactivity at specific dopant positions. These findings suggest that site-selective Si doping provides a viable route for engineering GQDs with tailored electronic and optical properties. Future work could explore the experimental validation of these theoretical predictions and extend the approach to other dopant atoms or composite nanostructures.</div>","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"131 7","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145144540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

Spatio-spectral correlations in interferenceless coded aperture correlation holography with vortex speckles 涡旋散斑无干涉编码孔径相关全息的空间光谱相关性

IF 2 3区物理与天体物理

Applied Physics B Pub Date : 2025-06-19 DOI: 10.1007/s00340-025-08507-x

Eulàlia Puig Vilardell, Shivasubramanian Gopinath, Vipin Tiwari, Tauno Kahro, Aarne Kasikov, Markus Kõiv, Andra Naresh Kumar Reddy, Joseph Rosen, Kaupo Kukli, Darius Gailevičius, Saulius Juodkazis, Vijayakumar Anand

{"title":"Spatio-spectral correlations in interferenceless coded aperture correlation holography with vortex speckles","authors":"Eulàlia Puig Vilardell, Shivasubramanian Gopinath, Vipin Tiwari, Tauno Kahro, Aarne Kasikov, Markus Kõiv, Andra Naresh Kumar Reddy, Joseph Rosen, Kaupo Kukli, Darius Gailevičius, Saulius Juodkazis, Vijayakumar Anand","doi":"10.1007/s00340-025-08507-x","DOIUrl":"10.1007/s00340-025-08507-x","url":null,"abstract":"<div>Interferenceless coded aperture correlation holography (I-COACH) is a computational imaging method that enables three-dimensional information of an object to be obtained without the need for two-beam interference. For the first time, in this study, we propose and demonstrate I-COACH with vortex speckles (I-COACH-VS). The vortex speckle distribution is generated by designing a unique coded mask by combining several spiral phases with different topological charges and linear phases using the transport of the amplitude into the phase based on the Gerchberg-Saxton algorithm (TAP-GSA). The spiral phase generates multiple beams carrying different orbital angular momentum, and the linear phase is used to map the beams at different locations within the image sensor to achieve a random vortex speckle distribution. The recently developed Lucy-Richardson-Rosen algorithm (LRRA) is used for image reconstruction. The theory, simulation studies, design of a coded mask by TAP-GSA, fabrication of coded masks by photolithography, and experimental demonstration of I-COACH-VS are presented. We believe that the developed method will be impactful in fields such as incoherent digital holography and computational imaging.</div>","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"131 7","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145144495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

Wavelength tunable mode converters using cascaded long period waveguide gratings in SiNOI and LNOI 使用级联长周期波导光栅的波长可调谐模式转换器在SiNOI和LNOI

IF 2 3区物理与天体物理

Applied Physics B Pub Date : 2025-06-18 DOI: 10.1007/s00340-025-08496-x

Rajat Chauhan, U. S. Tripathi, Vipul Rastogi

{"title":"Wavelength tunable mode converters using cascaded long period waveguide gratings in SiNOI and LNOI","authors":"Rajat Chauhan, U. S. Tripathi, Vipul Rastogi","doi":"10.1007/s00340-025-08496-x","DOIUrl":"10.1007/s00340-025-08496-x","url":null,"abstract":"<div>We report integrated-optic wavelength tunable mode converters in silicon nitride-on-insulator (SiNOI) and lithium niobate-on-insulator (LNOI) based channel waveguides for potential applications in mode division multiplexing (MDM) based optical communication systems. Integrated-optic mode converters are polarization dependent and require different gratings for TE and TM polarizations. We propose using cascaded long-period gratings on the sidewalls of the channel waveguide for mode conversion in both the polarizations to make full use of MDM system. One grating converts TE00 mode into TE10 mode while the other does the conversion of TM00 mode into TM20 mode. TM20 mode has been specifically chosen in the later case in order to avoid back conversion of TE10 mode into TE00 by the second grating. A distinguishing feature of the proposed design is the use of E7 liquid crystal (LC) cladding, which helps in tuning the wavelength for mode conversion by externally applied voltage. We numerically demonstrate TE00 to TE10 mode conversion with the conversion efficiency of 0.9 on SiNOI platform over a tuning range of 192 nm and on LNOI platform over a tuning range of 102 nm. TM00 to TM20 conversion has been achieved with 0.9 conversion efficiency on SiNOI platform over tuning range of 180 nm and on LNOI platform over tuning range of 144 nm, which covers the S + C + L band of the optical communication system. The proposed work can be helpful in realizing reconfigurable mode converters for mode division multiplexing (MDM) in integrated photonics.</div>","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"131 7","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145144171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

Using decision tree regression for estimation of birefringence in mode-locked fiber lasers 用决策树回归估计锁模光纤激光器的双折射

IF 2 3区物理与天体物理

Applied Physics B Pub Date : 2025-06-16 DOI: 10.1007/s00340-025-08481-4

Mahmut Bağcı

引用次数: 0

Flexible determination of the nonlinear refractive index or pulse duration in the visible range using Z-scan-based technique: application to fused silica 使用基于z -扫描的技术在可见范围内灵活测定非线性折射率或脉冲持续时间：应用于熔融二氧化硅

IF 2 3区物理与天体物理

Applied Physics B Pub Date : 2025-06-14 DOI: 10.1007/s00340-025-08502-2

Georges Boudebs, Julien-Bilal Zinoune, Christophe Cassagne, Cyril Mauclair

{"title":"Flexible determination of the nonlinear refractive index or pulse duration in the visible range using Z-scan-based technique: application to fused silica","authors":"Georges Boudebs, Julien-Bilal Zinoune, Christophe Cassagne, Cyril Mauclair","doi":"10.1007/s00340-025-08502-2","DOIUrl":"10.1007/s00340-025-08502-2","url":null,"abstract":"<div>We present a flexible and cost-effective Z-scan-based method, referred to as Beam Size Relative Variation (BSRV), for the determination of either the nonlinear refractive index ({n}_{2}) or the femtosecond pulse duration τ in the visible spectral range (650–900 nm). The technique, implemented using a tunable optical parametric amplifier (OPA), accommodates arbitrary beam profiles, thus removing the constraints imposed by traditional Gaussian or circular symmetry assumptions. Spatial characterization is performed via CCD imaging, while temporal information can be inferred directly from Z-scan measurements when a reference material is used. As a proof of concept, the method is applied to fused silica, a widely used reference material in nonlinear optics. A total of 108 Z-scan measurements were conducted across the spectral range, allowing for a robust statistical analysis of the extracted parameters. A new reference value is established for fused silica: (n_{2} = left( {1.8 pm 0.4} right) times 10^{ - 20} m^{2} /W). Notably, the pulse durations extracted from BSRV Z-scan data are statistically validated through independent measurements based on two-photon absorption (2PA) autocorrelation, with both methods revealing consistent spectral trends. All simulation tools and analysis codes are provided in the Supplementary Information to ensure reproducibility. This approach offers a reliable and accessible framework for nonlinear optical characterization, particularly in experimental contexts where conventional autocorrelation systems may be unavailable or cost prohibitive.</div>","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"131 7","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00340-025-08502-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145165891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Invited: Mode purity of phase structured light beams: role of spin-orbit coupling 邀请：相位结构光束的模式纯度：自旋轨道耦合的作用

IF 2 3区物理与天体物理

Applied Physics B Pub Date : 2025-06-13 DOI: 10.1007/s00340-025-08486-z

Suresh Chejarla, Debdutta Basu, Satyajit Maji, Nirmal K. Viswanathan, Balaji Srinivasan

引用次数: 0

Research on scanning intensity profile and frequency shift image of LiDAR in atmosphere 大气激光雷达扫描强度分布图及频移图像研究

IF 2 3区物理与天体物理

Applied Physics B Pub Date : 2025-06-13 DOI: 10.1007/s00340-025-08503-1

Si Chen, Haiyang Zhang, Fahong Jin, Bowen Zhang, Yujiao Qi

引用次数: 0

Non-thermal ablation of airborne Al2O3 particles by a nanosecond pulsed laser at 532 nm 532 nm纳秒脉冲激光对空气中Al2O3颗粒的非热烧蚀

IF 2 3区物理与天体物理

Applied Physics B Pub Date : 2025-06-12 DOI: 10.1007/s00340-025-08508-w

Chengdong Kong, Zhongshan Li

{"title":"Non-thermal ablation of airborne Al2O3 particles by a nanosecond pulsed laser at 532 nm","authors":"Chengdong Kong, Zhongshan Li","doi":"10.1007/s00340-025-08508-w","DOIUrl":"10.1007/s00340-025-08508-w","url":null,"abstract":"<div>The emission spectra from the ablation of airborne alumina nanoparticles by a 532 nm nanosecond pulsed laser are investigated to clarify the underlying mechanism and the applicability of different laser diagnostic techniques such as the laser-induced incandescence (LII) and the laser-induced breakdown spectroscopy (LIBS). The particles were observed to be completely ablated above the laser fluence of 6 J/cm2, along with the collection of Al atomic spectra at 394.39 nm and 396.16 nm. The Al spectra show no delay to the laser pulse and decays with a time scale of around 20 ns. A non-thermal ablation mechanism is thus proposed to interpret the Al spectra that the excited Al atoms are produced by electron induced ablation (i.e. Path One) and by recombination of free electrons and ions (i.e. Path Two). The proposed mechanism further implies that the maximum temperature of alumina particles achievable through laser illumination cannot reach its boiling point when a nanosecond pulsed laser is applied and the particle starts to be ablated at a relatively low particle temperature, restricting the applicability of LII for in-situ alumina particle detection.</div>","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"131 7","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145164208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

Laser-induced incandescence of iron nanoparticles: effects of laser-induced sintering and coalescence 激光诱导铁纳米颗粒的白炽：激光诱导烧结和聚结的影响。

IF 2 3区物理与天体物理

Applied Physics B Pub Date : 2025-06-11 DOI: 10.1007/s00340-025-08504-0

Stephen Robinson-Enebeli, Christof Schulz, Kyle J. Daun

{"title":"Laser-induced incandescence of iron nanoparticles: effects of laser-induced sintering and coalescence","authors":"Stephen Robinson-Enebeli, Christof Schulz, Kyle J. Daun","doi":"10.1007/s00340-025-08504-0","DOIUrl":"10.1007/s00340-025-08504-0","url":null,"abstract":"<div>While time-resolved laser-induced incandescence is a promising technique for characterizing metal nanoparticles in the gas phase, there remain several commonly observed and unexplained features in the data, including larger-than-predicted absorption cross-sections (excessive absorption) and faster-than-predicted cooling rates immediately following peak emission (apparent anomalous cooling). In the case of low melting point metals such as iron, laser-heated aggregates coalesce into spheres (i.e., fully sinter) before the peak of the LII signal is reached. Coalescence may affect the observed TiRe-LII signals in two ways: (i) the transition from aggregates to spheres reduces the absorption cross-section, which affects both the total absorbed laser energy and the intensity of the emitted incandescence in a wavelength-dependent manner; and (ii) surface energy is converted into sensible energy of the nanoparticles, which increases their peak temperature. While the revised LII model does not completely account for the rapid signal decay immediately following the peak signal, the predicted curves align more closely with the measured intensities from coalesced particles during the later cooling times.</div>","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"131 7","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12159127/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144300867","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0