Applied Physics B最新文献

{"title":"Stark-shift impact on quantum teleportation performance using a two two-level atom-cavity system as a resource","authors":"S. Boulifa,&nbsp;A. Slaoui,&nbsp;H. El Hadfi,&nbsp;R. Ahl Laamara","doi":"10.1007/s00340-025-08530-y","DOIUrl":"10.1007/s00340-025-08530-y","url":null,"abstract":"<div><p>In this work, we present a precise mathematical solution that explains how two two-level atoms interact with a multiphoton electromagnetic field inside a single-mode cavity, while specifically considering the Stark shift effect. The system is initialized with the field in a coherent state and both atoms in their excited states. The resulting model incorporates the changes in atomic energy levels induced by the Stark shift and serves as a transmission channel for the quantum teleportation of a bipartite state. Our study focuses on the combined influence of the Stark shift and photon number on teleportation fidelity and the preservation of quantum resources such as entanglement and coherence. The results reveal the existence of critical thresholds for these two parameters, below which the quality of teleportation degrades significantly. Additionally, we analyze the impact of these parameters on the Quantum Fisher Information (QFI), a key quantity for assessing the accuracy of parameter estimation after teleportation. A direct comparison between QFI and the Hilbert-Schmidt speed is also conducted to better understand the latter’s role in quantum estimation tasks.</p></div>","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"131 9","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145162998","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}

{"title":"Optical interferometric microfiber sensor for in situ flow velocity measurement in microfluidic chips","authors":"Fei Xie,&nbsp;Lili Liang,&nbsp;Chenyu Zhao,&nbsp;Rui Wang,&nbsp;Kang Yang,&nbsp;Sumei Jia,&nbsp;Guoyu Li,&nbsp;Yan Li","doi":"10.1007/s00340-025-08537-5","DOIUrl":"10.1007/s00340-025-08537-5","url":null,"abstract":"<div><p>Here, we introduce an optical interferometric microfiber sensor for in situ measurement of flow velocity in a microfluidic chip. The interferometric sensor is fabricated by fusing and tapering a standard single-mode optical fiber, and then embedded into a microfluidic chip, where the sensor element intersects vertically with the liquid flow channel. As the liquid flows through the channel, it applies pressure to the sensor’s sensitive surface, causing a wavelength shift in the transmission spectrum proportional to the flow velocity. Real-time monitoring and analysis of this wavelength shift enable precise flow velocity measurement. Results show that the proposed sensor chip exhibits excellent measurement performance within a average flow velocity range of 0–30.391 cm/s, with a average sensitivity of 0.094 nm/(cm/s). The resolution of average flow velocity measurement can reach 1.2 cm/s and the accuracy exceeds 90%.</p></div>","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"131 9","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145162621","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}

{"title":"Quantitative analysis and classification of uranium polymetallic ores using femtosecond laser-induced breakdown spectroscopy combined with machine learning algorithms","authors":"Shichao Ren,&nbsp;Min Zhang,&nbsp;Jianfeng Cao,&nbsp;Siwei Li,&nbsp;Yumin Liu,&nbsp;Xiangting Meng,&nbsp;Xiaoyan Li,&nbsp;Xiaoliang Liu","doi":"10.1007/s00340-025-08536-6","DOIUrl":"10.1007/s00340-025-08536-6","url":null,"abstract":"<div><p>Uranium polymetallic ores (UPOs) are strategic emerging mineral resources that possess both significant economic value and strategic importance. In this study, femtosecond laser-induced breakdown spectroscopy (LIBS) was combined with four machine learning algorithms—partial least squares regression (PLSR), principal component analysis (PCA), support vector machine (SVM), and linear discriminant analysis (LDA)—to perform quantitative analysis of uranium (U) concentration and classification of UPO samples. The concentrations of U in six UPO samples were determined using a high-purity germanium gamma ray spectrometer, which served as reference values. Three spectral normalization methods were applied to preprocess the raw spectra and assess the impact of preprocessing on model performance. Due to the significant matrix effect, the intensities of U characteristic emission lines did not exhibit a clear linear correlation with U concentration, making the univariate analysis impossible. However, the multivariate regression model based on PLSR algorithm was employed to mitigate the matrix effect, enabling accurate U quantification in UPOs. The leave-one-out cross-validation results showed that, with the exception of sample 1#, the combination of femtosecond LIBS and PLSR reliably predicted U concentration in the other samples, with relative standard deviation and mean relative error maintained below 9.48% and 7.30%, respectively. Furthermore, PCA was applied to the whole LIBS spectral dataset for dimensionality reduction and feature vector reconstruction. The resulting principal components were used as inputs for SVM and LDA classification algorithms to distinguish among the six ore types. The SVM model achieved a classification accuracy of 91.67%, while LDA demonstrated a superior classification performance with 100% accuracy. Overall, this study demonstrates that the combination of femtosecond LIBS with machine learning algorithms enables effective quantitative analysis of U and accurate classification of UPOs.</p></div>","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"131 8","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161997","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}

{"title":"Method for UAV propeller characterization using frequency analysis of Lidar signals","authors":"Adrien P. Genoud,&nbsp;Topu Saha,&nbsp;Joseph Torsiello,&nbsp;Ian Gatley,&nbsp;Benjamin P. Thomas","doi":"10.1007/s00340-025-08533-9","DOIUrl":"10.1007/s00340-025-08533-9","url":null,"abstract":"<div><p>The rapid proliferation of commercial unmanned aerial vehicles (UAVs) poses growing security, safety, and privacy challenges. This paper presents a novel frequency-domain analysis methodology to extract mechanical signatures of UAVs using backscattered optical signals from drone propellers. Through both simulations and experimental validation, the feasibility of retrieving key mechanical signatures, including the propeller's rotational speed (RPM) and the number of blades, was demonstrated. These signatures are a first step towards the real-time identification of drone models and provide insights into drone’s flight behavior. The methodology, tested here with small toy drones, offers promise for real-world deployment of drone monitoring systems, complementing traditional detection techniques by operating in various atmospheric conditions. Additionally, harmonic and frequency peak analysis may allow for future improvements in trajectory tracking and payload detection. This work opens new possibilities for integrating lidar-based UAV characterization into both civilian and military airspace security frameworks.</p></div>","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"131 8","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12313808/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144774441","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}

{"title":"A custom-built high-finesse reference cavity for cold Rydberg atom excitation","authors":"Jun-Ren Chen,&nbsp;Yu-Hsuan Chang,&nbsp;Yi-Wei Liu","doi":"10.1007/s00340-025-08535-7","DOIUrl":"10.1007/s00340-025-08535-7","url":null,"abstract":"<div><p>We present a custom-built ultra-low expansion (ULE) cavity system designed for high-precision laser frequency stabilization. The cavity mirrors are bonded to the ULE spacer using a low thermal expansion adhesive, and the assembled cavity exhibits a finesse of nearly <span>(3 times 10^{4})</span>. A custom-designed multilayer aluminum housing was developed to passively isolate the cavity from environmental fluctuations. Long-term performance characterization reveals a frequency drift of approximately 164 kHz per day. After locking a diode laser to the cavity using the Pound-Drever-Hall technique, we achieve a linewidth of approximately <span>(19.4~text {kHz})</span> and a fractional frequency stability of  <span>(6.4 times 10^{-13})</span> at 1 s. To validate the reliability of this frequency-stabilized laser system, we applied it to Rydberg excitation spectroscopy via trap-loss measurements of cold <span>( ^{{87}} {text{Rb}} )</span> atoms. While the introduction of a custom intermediate circuit (I.C.) already reduces the linewidth from 34 to 6 MHz, cavity locking further suppresses frequency fluctuations, as evidenced by the enhanced stability in the trap-loss signal. Our system offers a robust and cost-effective solution for high-resolution spectroscopy, with applications in coherent control of Rydberg atoms.</p></div>","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"131 8","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00340-025-08535-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145171508","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}

{"title":"Continuum laser absorption spectroscopy of C2(a3Πu) in a sublimating cloud of carbon black","authors":"Colton Willhardt,&nbsp;Neil Thakker,&nbsp;Nick Son,&nbsp;Adam Hammond-Clements,&nbsp;Kyle Daniel,&nbsp;Nick Glumac","doi":"10.1007/s00340-025-08523-x","DOIUrl":"10.1007/s00340-025-08523-x","url":null,"abstract":"<div><p>A direct optical absorption diagnostic has been developed for rotationally resolved measurements of diatomic carbon (a³Π_u→d³Π_g (0,0) and (1,1)) at a repetition rate of 525 kHz and resolution of 7.3 pm over the range of 511.1–514.1 nm. The diagnostic utilizes a high-power pulsed continuum laser light source dispersed in a spectrograph and imaged by a high-speed camera. Measurements have been performed that capture the temporal evolution of C₂ number density and temperature of a cloud of carbon black sublimating in shock heated gas at high temperature and pressure (T = 5500 K, <i>P</i> = 3.7 atm). A simultaneous light absorption measurement of the condensed phase enables comparisons of the gaseous C₂ number density to the condensed phase mass. The continuum laser absorption diagnostic is applied to C₂ in this work but shows promise in being a simple “drop-in” system for absorption spectroscopy in the visible range at rapid repetition rates and high dispersion, filling an important gap for laser diagnostic systems.</p></div>","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"131 8","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00340-025-08523-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145171512","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}

{"title":"Phase-controlled efficient detection of topological charge of vortex Bessel beam","authors":"Nawaz Sarif Mallick,&nbsp;Sankar De","doi":"10.1007/s00340-025-08527-7","DOIUrl":"10.1007/s00340-025-08527-7","url":null,"abstract":"<div><p>We introduce an advanced methodology for determining the topological charge of a vortex Bessel beam via light-atom interactions in a closed-loop three-level atomic system. This technique exploits the interplay between an optical Bessel beam with topological charge <span>(ell _p)</span> and a microwave Bessel beam with topological charge <span>(ell _{mu })</span>, which collectively induce a spatially varying, phase-sensitive atomic susceptibility. This interaction manifests in a distinct pattern of alternating absorption and transparency regions in the transverse plane, governed by the medium’s resultant topological charge, <span>(ell = ell _{mu } - ell _{p})</span>. The transparency windows selectively allow specific beam portions to propagate, while absorption windows block others, transforming the beam’s concentric rings into structured patterns of alternating bright and dark strips. The number of these strips directly correlates with the Bessel beam’s topological charge. Analytical expressions for atomic susceptibility elucidate the mechanism underlying this transformation, enabling simultaneous and precise measurement of the topological charges of both beams. The superior sensitivity of this approach opens up transformative possibilities for applications in communications, microscopy, and optical metrology. Furthermore, varying the relative phase between the optical and microwave beams induces a controlled angular rotation of the structured beam, offering enhanced maneuverability over beam orientation. This robust approach not only facilitates precise characterization of structured light but also supports advanced applications in optical computing, information processing, and sensing technologies.</p></div>","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"131 8","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145170256","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}

{"title":"Correction: Efficient control of three-dimensional atom localization via probe absorption in a phase-coherent atomic medium","authors":"Aniket Banerjee,&nbsp;Pradipta Panchadhyayee,&nbsp;Bibhas Kumar Dutta","doi":"10.1007/s00340-025-08529-5","DOIUrl":"10.1007/s00340-025-08529-5","url":null,"abstract":"","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"131 8","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168955","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}

{"title":"Photon plasmon coupling in black phosphorus embedded between chiroferrite layers","authors":"Mohamed Shaban,&nbsp;Sameerah I. Al-Saeedi,&nbsp;A. M. Elbasiony,&nbsp;A. Waleed,&nbsp;Fadhil Faez Sead,&nbsp;Rana Muhammad Zulqarnain","doi":"10.1007/s00340-025-08528-6","DOIUrl":"10.1007/s00340-025-08528-6","url":null,"abstract":"<div>\u0000 \u0000 <p>Characteristics of photon plasmon coupling in black phosphorus (BP) embedded between chiroferrite layer is analyzed in THz frequency spectrum. The frequency behavior and propagation characteristics of SPPs are analyzed under various physical parameters i.e., chirality parameter (<span>(xi)</span>), gyrotropy (<span>({mu}_{2})</span>), carrier density (<span>({n}_{s})</span>), and the number of layers (<span>(N)</span>). Numerical results indicate the significant dependency of surface plasmon frequency on these parameters along (<span>({sigma}_{ac})</span>) and (<span>({sigma}_{zz})</span>) conductivities of BP. As chirality parameter (<span>(xi)</span>) increases, the plasmonic frequency increases for both conductivities. While gyrotropy (<span>({mu}_{2})</span>) shifts the plasmonic response, with larger values of <span>({mu}_{2})</span> leading to decrease the plasmonic frequency. The carrier density <span>({n}_{s})</span> also influences the plasmon frequency, with higher <span>({n}_{s})</span> values resulting in higher frequencies for both (<span>({sigma}_{ac})</span>) and (<span>({sigma}_{zz})</span>). Furthermore, the number of BP layers (N) has notable impact, as an increase in N causes a steeper rise in frequency for both (<span>({sigma}_{ac})</span>) and (<span>({sigma}_{zz})</span>). Propagation loss or imaginary part of propagation constant for different carries density is also analyzed for both conductivities. Based on numerical results <span>({sigma}_{ac})</span> is suitable for higher frequencies compared to <span>({sigma}_{zz})</span>​. This suggests that <span>({sigma}_{ac})</span>​ might possess properties that facilitate its performance or responsiveness at higher frequencies in contrast to <span>({sigma}_{zz})</span>​. However, <span>({sigma}_{zz})</span> exhibits higher effective mode index for the proposed waveguide structure. Additionally, modulating carrier density can control both the phase velocity and propagation length. The proposed waveguide structure holds promising potential for plasmonic community to fabricate nanophotonic devices due to anisotropy of chiroferrite and BP medium in THz frequency regime.</p>\u0000 </div>","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"131 8","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168246","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}

{"title":"Probing peptide adsorption kinetics and regioselectivity via multipolar plasmonic modes of gold resonators","authors":"Mathieu Nicolas,&nbsp;Shuhui Yang,&nbsp;Christophe Méthivier,&nbsp;Souhir Boujday,&nbsp;Bruno Gallas","doi":"10.1007/s00340-025-08525-9","DOIUrl":"10.1007/s00340-025-08525-9","url":null,"abstract":"<div><p>Efficient peptide adsorption on metasurfaces is essential for advanced biosensing applications. In this study, we demonstrate how ellipsometric measurements coupled with numerical simulations allow for real-time tracking of temporin-SHa peptide adsorption on gold metasurfaces. By characterizing spectral shifts at 660 nm, 920 nm, and 1000 nm, we reveal a rapid saturation of surface coverage after 3.5 h, with a significant preferential adsorption at the resonator ends. Our approach provides a novel methodology for monitoring peptide binding, which could be applied to a wide range of biosensor designs.</p></div>","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"131 8","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167653","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}