The European Physical Journal D最新文献

Enhanced circular dichroism induced by connectivity effect of rectangular metal nanorods 矩形金属纳米棒的连接效应引起的圆二色性增强

IF 1.5 4区物理与天体物理

The European Physical Journal D Pub Date : 2025-01-21 DOI: 10.1140/epjd/s10053-024-00943-2

Hang Zhang, Zhongtao Liu, Lei Liu, Hui Li

{"title":"Enhanced circular dichroism induced by connectivity effect of rectangular metal nanorods","authors":"Hang Zhang, Zhongtao Liu, Lei Liu, Hui Li","doi":"10.1140/epjd/s10053-024-00943-2","DOIUrl":"10.1140/epjd/s10053-024-00943-2","url":null,"abstract":"<p>Compared to natural chiral structures, planar chiral plasmonic nanostructures, which are two-dimensional artificial structures composed of noble metals that break mirror symmetry, are widely applied in fields such as analytical chemistry, pharmaceutical production, and bioanalytical monitoring. Understanding circular dichroism (CD) and its enhancement mechanisms is crucial for these applications. Although a variety of chiral structures have been extensively studied, a deep understanding of the tunability of the CD effect remains insufficient. In particular, helical structures face challenges such as difficult fabrication and poor tunability. In this study, we designed a chiral structure composed of rectangular metal nanorods and metallic spheres, aiming to achieve a significant tunable CD effect by utilizing the connectivity effect of the metal nanorods, reaching an impressive CD value of 0.7. Results calculated by the finite element method show that, near the resonant wavelengths of 710 nm and 730 nm, the spectral responses of <span>({T}_{++})</span> and <span>({T}_{--})</span>, respectively, exhibit peak and valley patterns, thereby generating a substantial CD effect. Fundamentally, this is due to the shifting of the resonance modes at these specific wavelengths under RCP and LCP light. The extent of this shift can be precisely manipulated by altering the width of the rectangular metal nanorods, thus enabling controlled CD effects. Moreover, the CD effect is found to be highly dependent upon the geometric parameters of the designed structures. In summary, these findings contribute significantly to the development of planar chiral plasmonic nanostructures with tunable and large CD effects, providing valuable insights for their optimization and practical applications.</p>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"79 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142995558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Study on the coupling and ion acceleration between ultraintense laser and multilayer solid targets 超强激光与多层固体靶的耦合及离子加速研究

IF 1.5 4区物理与天体物理

The European Physical Journal D Pub Date : 2025-01-15 DOI: 10.1140/epjd/s10053-024-00950-3

Chong Lv, Jialun Chai, Xiaona Ban, Wei Sun

引用次数: 0

Atomic spectra and oscillator strengths (ASOS14) 原子光谱和振荡器强度（ASOS14）

IF 1.5 4区物理与天体物理

The European Physical Journal D Pub Date : 2025-01-08 DOI: 10.1140/epjd/s10053-024-00948-x

W.-Ü Lydia Tchang-Brillet, Paul Indelicato, Alexander Kramida, Stefan Schippers, Glenn Wahlgren

引用次数: 0

Hyperfine structure constants for neutral and singly ionized manganese using Fourier transform spectra 用傅里叶变换光谱研究中性和单离子锰的超精细结构常数

IF 1.5 4区物理与天体物理

The European Physical Journal D Pub Date : 2025-01-08 DOI: 10.1140/epjd/s10053-024-00945-0

Hongfeng Zheng, Die Fang, Liguang Jiao, Xiaolei Che, Zhenwen Dai

{"title":"Hyperfine structure constants for neutral and singly ionized manganese using Fourier transform spectra","authors":"Hongfeng Zheng, Die Fang, Liguang Jiao, Xiaolei Che, Zhenwen Dai","doi":"10.1140/epjd/s10053-024-00945-0","DOIUrl":"10.1140/epjd/s10053-024-00945-0","url":null,"abstract":"<div><p><b>We utilized the archival data recorded by the Fourier transform spectrometer at the USA National Solar Observatory to investigate the hyperfine structure (HFS) for neutral manganese (Mn I) and singly ionized manganese (Mn II) levels.</b> HFS constants for 25 levels of Mn I between 24,779 cm<sup>−1</sup> and 62,671 cm<sup>−1</sup> and, those for 14 levels of Mn II between 38,366 cm<sup>−1</sup> and 99,893 cm<sup>−1</sup> were determined by analyzing 100 spectral lines, among which the results for 15 levels of Mn I and eight levels of Mn II are reported for the first time, to our best knowledge. <b>This increases the total number of levels with experimental HFS constants to 182 for Mn I and 116 for Mn II.</b> For two Mn I levels and one Mn II level, both magnetic dipole HFS constants <i>A</i> and electric quadrupole HFS constants <i>B</i> were obtained. For the other levels, only <i>A</i> constants were determined. The uncertainties of most of the HFS constants determined in this work are less than 10%.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"79 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142939198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Measurements of power dissipated in an atmospheric pressure plasma jet device with double plasma discharge ignition 双等离子体放电点火常压等离子体喷射装置耗散功率的测量

IF 1.5 4区物理与天体物理

The European Physical Journal D Pub Date : 2024-12-23 DOI: 10.1140/epjd/s10053-024-00946-z

Fellype do Nascimento, Kleber A. Petroski, Thalita M. C. Nishime, Konstantin G. Kostov

{"title":"Measurements of power dissipated in an atmospheric pressure plasma jet device with double plasma discharge ignition","authors":"Fellype do Nascimento, Kleber A. Petroski, Thalita M. C. Nishime, Konstantin G. Kostov","doi":"10.1140/epjd/s10053-024-00946-z","DOIUrl":"10.1140/epjd/s10053-024-00946-z","url":null,"abstract":"<p>Atmospheric pressure plasma jets (APPJs) are versatile devices with numerous applications. This work focuses on APPJs generated at the tip of long, flexible tubes using the jet transfer technique. The plasma source consists of a primary discharge and a secondary discharge forming the plasma jet. Discharge power measurements were carried out in a way that it was possible to separate the contribution of the primary discharge from the total power dissipated by the plasma source. Both power and effective current were analyzed under different operating conditions. The results show that the variation in the primary discharge power is much lower than the power dissipated by the plasma jet. Additionally, the electrical characteristics of the plasma device were analyzed. Notable differences were observed between the negative and positive phases of the discharge, with a more resistive load in the negative one, which suggests that the electrical equivalent circuit model changes according to the voltage polarity.</p><p>The primary discharge spectra are not affected by differences in electrical characteristics of the discharges with the plasma jet on and off</p>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"78 12","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142875213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Spectroscopic diagnostics of eggshells plasma using LIBS with self-absorption correction in conjunction with WDXRF, EDS and FTIR techniques 结合WDXRF、EDS和FTIR技术，利用自吸收校正的LIBS对蛋壳等离子体进行光谱诊断

IF 1.5 4区物理与天体物理

The European Physical Journal D Pub Date : 2024-12-20 DOI: 10.1140/epjd/s10053-024-00944-1

Muhammad Fahad, Khizar Hussain Shah, Sajjad Ali, Muhammad Abrar

{"title":"Spectroscopic diagnostics of eggshells plasma using LIBS with self-absorption correction in conjunction with WDXRF, EDS and FTIR techniques","authors":"Muhammad Fahad, Khizar Hussain Shah, Sajjad Ali, Muhammad Abrar","doi":"10.1140/epjd/s10053-024-00944-1","DOIUrl":"10.1140/epjd/s10053-024-00944-1","url":null,"abstract":"<div><p>Precise determination of heavy metals and trace elements in eggshells from conventional and organic poultry production systems is carried out using a two distinct CF-LIBS techniques, namely one-line calibration-free (OLCF) and self-calibration (SC) LIBS, coupled with XRD, WD-XRF, EDS and FTIR. A <i>Q</i>-switched Nd:YAG laser with a wavelength of 1064 nm, pulse duration of 9 ns and pulse energy of 126 mJ was used to generate plasma. Spectral analysis revealed Ca, Mg, S, Fe, Mn, Cr, Sr, Al, Cu, Ni, Na, and Li in both organic (OE) and regular (FE) chicken eggshells, whereas a heavy element Ba was only detected in OE emission spectra. A mean value of plasma temperature was calculated as 7500 ± 750 K using a Boltzmann plot in addition to Saha-Boltzmann plot approach with self-absorption corrections and used for calcium quantification, whereas electron number density value was calculated as 5.68 × 10<sup>16</sup> cm<sup>−3</sup>. The concentration of major constituent Ca in OE versus FE determined by CF-LIBS techniques along with XRF and EDS was found as: OLCF-LIBS = 99.23% versus 99.11%, SC-LIBS = 99.78% versus 99.73%, XRF = 99.81% versus 99.76%, and EDS = 99.83% versus 99.89%. The results showed that SC-LIBS method is more accurate for precise compositional analysis and findings were close to that determined by XRF and EDS methods. The results further demonstrated LIBS capability to identify heavy metals and trace elements within eggshell samples accurately and hence, contributing to and advancing our understanding of the utilization of LIBS technique in this field.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div><div><p>Spectroscopic diagnostics of eggshells plasma using LIBS</p></div></div></figure></div></div>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"78 12","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142859721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Scars of Kramers–Henneberger atoms 克拉默-亨内伯格原子的伤疤

IF 1.5 4区物理与天体物理

The European Physical Journal D Pub Date : 2024-12-16 DOI: 10.1140/epjd/s10053-024-00942-3

E. Floriani, J. Dubois, C. Chandre

引用次数: 0

Small amplitude ion-acoustic waves in electron-ion dusty plasma: Landau damping effects of combined Kappa–Cairns distributed electrons 电子-离子尘埃等离子体中的小振幅离子声波：卡帕-凯恩斯组合分布电子的朗道阻尼效应

IF 1.5 4区物理与天体物理

The European Physical Journal D Pub Date : 2024-12-16 DOI: 10.1140/epjd/s10053-024-00941-4

Rittika Pain, Sandip Dalui, Sankirtan Sardar, Anup Bandyopadhyay

引用次数: 0

Nonlinear optical properties of colloidal solutions of Ag2Se quantum dots passivated with 2-Mercaptopropionic acid in the field of 10 ns YAG:Nd3+ laser pulses 2-巯基丙酸钝化Ag2Se量子点胶体溶液在10 ns YAG:Nd3+激光脉冲场中的非线性光学性质

IF 1.5 4区物理与天体物理

The European Physical Journal D Pub Date : 2024-12-12 DOI: 10.1140/epjd/s10053-024-00940-5

O. V. Ovchinnikov, A. I. Zvyagin, M. S. Smirnov, I. G. Grevtseva, S. V. Aslanov, A. Hussein

{"title":"Nonlinear optical properties of colloidal solutions of Ag2Se quantum dots passivated with 2-Mercaptopropionic acid in the field of 10 ns YAG:Nd3+ laser pulses","authors":"O. V. Ovchinnikov, A. I. Zvyagin, M. S. Smirnov, I. G. Grevtseva, S. V. Aslanov, A. Hussein","doi":"10.1140/epjd/s10053-024-00940-5","DOIUrl":"10.1140/epjd/s10053-024-00940-5","url":null,"abstract":"<div><p>The results of a study of the nonlinear optical properties of Ag<sub>2</sub>Se colloidal quantum dots (QDs) passivated with 2-mercaptopropionic acid (hereinafter Ag<sub>2</sub>Se/2-MPA) with an average size of 2.0–2.5 nm in the field of 10 ns YAG:Nd<sup>3+</sup> laser pulses are presented. Using the Z-scan method in an open aperture design, it was found that the nonlinear absorption in Ag<sub>2</sub>Se/2-MPA colloidal QDs is due to reverse saturation absorption (RSA). In addition, Z-scanning in a closed-aperture scheme demonstrated nonlinear refraction, which manifested itself in the form of defocusing of the probing radiation. Dependences of the level of nonlinear absorption and refraction of laser pulses on the concentration of the Se precursor were discovered, which affects the crystallization conditions and the degree of nonstoichiometry of the formed nanocrystals, as well as the concentration of dangling bonds. The obtained patterns indicate the participation of localized states in the RSA process, and changes in the population of localized states determine the observed defocusing effect.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"78 12","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142810884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Improved photon blockade in the two-photon Jaynes–Cummings model by additional quantum interference 利用附加量子干涉改进双光子Jaynes-Cummings模型中的光子封锁

IF 1.5 4区物理与天体物理

The European Physical Journal D Pub Date : 2024-12-11 DOI: 10.1140/epjd/s10053-024-00936-1

Xin Liu, XiaoNing Cui, MengYu Tian, Chao Sun, YuFan Zhu

引用次数: 0