Journal of Physics B: Atomic, Molecular and Optical Physics最新文献_第3页

Indirect measurement of atomic magneto-optical rotation via Hilbert transform 通过希尔伯特变换间接测量原子磁光旋转

IF 1.6 4区物理与天体物理

Journal of Physics B: Atomic, Molecular and Optical Physics Pub Date : 2024-08-06 DOI: 10.1088/1361-6455/ad5e24

Jack D Briscoe, Danielle Pizzey, Steven A Wrathmall and Ifan G Hughes

{"title":"Indirect measurement of atomic magneto-optical rotation via Hilbert transform","authors":"Jack D Briscoe, Danielle Pizzey, Steven A Wrathmall and Ifan G Hughes","doi":"10.1088/1361-6455/ad5e24","DOIUrl":"https://doi.org/10.1088/1361-6455/ad5e24","url":null,"abstract":"The Kramers–Kronig relations are a pivotal foundation of linear optics and atomic physics, embedding a physical connection between the real and imaginary components of any causal response function. A mathematically equivalent, but simpler, approach instead utilises the Hilbert transform. In a previous study, the Hilbert transform was applied to absorption spectra in order to infer the sole refractive index of an atomic medium in the absence of an external magnetic field. The presence of a magnetic field causes the medium to become birefringent and dichroic, and therefore it is instead characterised by two refractive indices. In this study, we apply the same Hilbert transform technique to independently measure both refractive indices of a birefringent atomic medium, leading to an indirect measurement of atomic magneto-optical rotation. Key to this measurement is the insight that inputting specific light polarisations into an atomic medium induces absorption associated with only one of the refractive indices. We show this is true in two configurations, commonly referred to in literature as the Faraday and Voigt geometries, which differ by the magnetic field orientation with respect to the light wavevector. For both cases, we measure the two refractive indices independently for a Rb thermal vapour in a magnetic field, finding excellent agreement with theory. This study further emphasises the application of the Hilbert transform to the field of quantum and atomic optics in the linear regime.","PeriodicalId":16826,"journal":{"name":"Journal of Physics B: Atomic, Molecular and Optical Physics","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141937009","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

What future for attophysics? 物理学的未来会怎样？

IF 1.5 4区物理与天体物理

Journal of Physics B: Atomic, Molecular and Optical Physics Pub Date : 2024-07-25 DOI: 10.1088/1361-6455/ad6383

Pierre Agostini

引用次数: 0

Doppler sensitivity and resonant tuning of Rydberg atom-based antennas 基于雷德贝格原子的天线的多普勒灵敏度和谐振调谐

IF 1.6 4区物理与天体物理

Journal of Physics B: Atomic, Molecular and Optical Physics Pub Date : 2024-07-24 DOI: 10.1088/1361-6455/ad6385

Peter B Weichman

{"title":"Doppler sensitivity and resonant tuning of Rydberg atom-based antennas","authors":"Peter B Weichman","doi":"10.1088/1361-6455/ad6385","DOIUrl":"https://doi.org/10.1088/1361-6455/ad6385","url":null,"abstract":"Radio frequency antennas based on Rydberg atom vapor cells can in principle reach sensitivities beyond those of any conventional wire antenna, especially at lower frequencies where very long wires are needed to accommodate the increasing wavelength. They also have other desirable features such as consisting of nonmetallic, hence lower profile, elements. This paper presents a detailed theoretical investigation of Rydberg antenna sensitivity, elucidating parameter regimes that could cumulatively lead to a sensitivity increase 2–3 orders of magnitude beyond that of currently tested configurations. The key insight is to optimally combine the advantages of two well-studied approaches: (i) three laser ‘2D star configuration’ setups that, when enhanced with increased laser power, to some degree compensate for atom motion-induced Doppler broadening, and (ii) resonant coupling between a pair of near-degenerate Rydberg levels, tuned via a local oscillator to the incident signal of interest. The advantage of the star setup is subtle because it only restores the overall sensitivity to the expected Doppler-limited value, compensating for additional significant off-resonance reductions where differently moving atom sub-populations destructively interfere with each other in the net signal. An additional unique advantage of local oscillator tuning is that it leads to vastly narrower line widths, as low as ∼10 kHz set by the intrinsic Rydberg state lifetimes, rather than the typical ∼10 MHz scale set by the core state lifetimes. Intuitively, with this setup the two Rydberg states may be tuned to act as an independent high-q cavity, a point of view supported by a study of the frequency-dependence of the antenna resonant response. There are a number of practical experimental advances, especially larger ∼1 cm laser beam widths, required to suppress various extrinsic line broadening effects and to fully exploit this ‘Rydberg superheterodyne’ response.","PeriodicalId":16826,"journal":{"name":"Journal of Physics B: Atomic, Molecular and Optical Physics","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141782045","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

Dissociative recombination of NS+ in collision with slow electrons NS+ 与慢速电子碰撞时的分解重组

IF 1.6 4区物理与天体物理

Journal of Physics B: Atomic, Molecular and Optical Physics Pub Date : 2024-07-17 DOI: 10.1088/1361-6455/ad5e20

R Hassaine, F Gauchet, F Iacob, J Zs Mezei, E Roueff, J Tennyson and I F Schneider

引用次数: 0

Low energy elastic and inelastic scattering of positrons from formic acid 甲酸正电子的低能弹性和非弹性散射

IF 1.5 4区物理与天体物理

Journal of Physics B: Atomic, Molecular and Optical Physics Pub Date : 2024-07-15 DOI: 10.1088/1361-6455/ad636a

David Stevens, Aaditya Datar, Z. Cheong, J. P. Sullivan

引用次数: 0

A compact electron beam ion source for highly charged ion experiments at large-scale user facilities 用于大型用户设施高电荷离子实验的紧凑型电子束离子源

IF 1.5 4区物理与天体物理

Journal of Physics B: Atomic, Molecular and Optical Physics Pub Date : 2024-07-15 DOI: 10.1088/1361-6455/ad6384

Daniel Thima, A. Niggas, Matthias Werl, G. L. Szabo, Paul-Friedmar Laux, Mike Schmidt, Günter Zschornack, F. Aumayr, R. Wilhelm

{"title":"A compact electron beam ion source for highly charged ion experiments at large-scale user facilities","authors":"Daniel Thima, A. Niggas, Matthias Werl, G. L. Szabo, Paul-Friedmar Laux, Mike Schmidt, Günter Zschornack, F. Aumayr, R. Wilhelm","doi":"10.1088/1361-6455/ad6384","DOIUrl":"https://doi.org/10.1088/1361-6455/ad6384","url":null,"abstract":"\u0000 Probing and manipulating of 2D materials and their heterostructures using slow highly charged ions (HCIs) is currently a hot topic due to the ultimate surface sensitivity of electronic sputtering with profound implications for fundamental research and technological applications. To study surface modifications without the complications of sample transport from ion irradiation to complex microscopic or spectroscopic analysis tools, the development of compact and thus portable ion sources is essential. In this paper we present the first results of the Electron Beam Ion Source - Compact version 1 (EBIS-C1), a novel and highly compact source for highly charged ions manufactured by D.I.S Germany GmbH. The main focus of this paper is to demonstrate the suitability of the EBIS-C1 as an ideal source for ion scattering experiments at surfaces and at gas/liquid jet targets by presenting the first charge state spectra of extracted neon, argon and xenon ions. The results highlight the potential of this portable EBIS to become a versatile platform for the study of HCI-surface interactions, allowing investigations to be carried out at user terminals in different laboratory environments.","PeriodicalId":16826,"journal":{"name":"Journal of Physics B: Atomic, Molecular and Optical Physics","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141645664","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

Geometric and electronic properties of anionic precious metal gold doped boron clusters AuBn - (n = 10-20) 阴离子贵金属掺金硼团簇 AuBn -（n = 10-20）的几何和电子特性

IF 1.5 4区物理与天体物理

Journal of Physics B: Atomic, Molecular and Optical Physics Pub Date : 2024-07-15 DOI: 10.1088/1361-6455/ad636b

Peixin Fu, Bole Chen, Kewei Ding, Cheng Lu

{"title":"Geometric and electronic properties of anionic precious metal gold doped boron clusters AuBn\u0000 - (n = 10-20)","authors":"Peixin Fu, Bole Chen, Kewei Ding, Cheng Lu","doi":"10.1088/1361-6455/ad636b","DOIUrl":"https://doi.org/10.1088/1361-6455/ad636b","url":null,"abstract":"\u0000 Recently, the Au-B covalent bonds in gold doped boron clusters has attracted great attention. However, there are fewer theoretical reports on exploration their ground state structures and stabilities, especially for The medium sizes. Here, we study the structural evolution and electronic properties of the anionic Au doped boron clusters with medium sizes of n from 10 to 20 using the unbiased cluster structural searches combined with density functional theory (DFT) calculations. The results reveal that the quasi-planar AuB18\u0000 - (1A, C1) cluster shows excellent stability and a large vertical separation energy (VDE) of 4.25 eV. The good consistency between the computationally simulated photoelectron spectra and the experimental spectra strongly supports the correctness of our low-lying structures. Further bonding analyses show that the well-stabilized aromatic AuB18\u0000 - cluster is due to the active σ interactions between Au atom (6s orbitals) and B units (2p orbitals), as well as the large number of σ-bonds in the B18\u0000 - moiety with π-aromaticity. These findings enriched the family of Au-B alloy clusters and metal-doped boron-based aromatic clusters, which provide valuable information for the experimental characterization and preparation of boron-rich alloy nanoclusters in the future.","PeriodicalId":16826,"journal":{"name":"Journal of Physics B: Atomic, Molecular and Optical Physics","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141644918","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

Resonant Raman Auger spectroscopy on transient core-excited Ne ions 瞬态核激发氖离子的共振拉曼奥杰光谱学

IF 1.5 4区物理与天体物理

Journal of Physics B: Atomic, Molecular and Optical Physics Pub Date : 2024-07-15 DOI: 10.1088/1361-6455/ad6369

T. Mazza, T. Baumann, R. Boll, A. De Fanis, Simon Dold, Terence Mullins, Y. Ovcharenko, Daniel E. Rivas, B. Senfftleben, S. Usenko, Iyas Ismail, John D Bozek, Marc Simon, S. Fritzsche, M. Meyer, M. Ilchen

引用次数: 0

Exploring the origin of stronger survival of polarized vortex beams through scattering media 探索极化涡流束在散射介质中生存能力更强的原因

IF 1.6 4区物理与天体物理

Journal of Physics B: Atomic, Molecular and Optical Physics Pub Date : 2024-07-11 DOI: 10.1088/1361-6455/ad5e22

Atharva Paranjape, Shyamal Guchhait, Athira B S and Nirmalya Ghosh

{"title":"Exploring the origin of stronger survival of polarized vortex beams through scattering media","authors":"Atharva Paranjape, Shyamal Guchhait, Athira B S and Nirmalya Ghosh","doi":"10.1088/1361-6455/ad5e22","DOIUrl":"https://doi.org/10.1088/1361-6455/ad5e22","url":null,"abstract":"Laguerre–Gaussian (LG) beams carrying orbital angular momentum (OAM) have shown promise in deep tissue imaging, medical diagnostics, and optical communication due to their robust propagation properties through scattering media. The insight on the mechanism for stronger survival of OAM carrying beam in tissue-like turbid media is expected to contribute towards a better understanding of light transport in the presence of scattering, as well as guide optimization of the intensity, phase, and polarization structure of light for use in biomedical applications like in tissue imaging. We examine the scattering properties by studying the propagation of polarized vortex beams transmitted through tissue-like turbid scattering media. We demonstrate that the intensity profile has a much more profound effect on depolarization than the phase profile for LG beams. Our results indicate that the observed stronger propagation for the higher-order LG beams is due to a higher anisotropy factor g, as seen by the incident beam. We have performed the degree of polarization measurements for the forward scattered light in the case of both LG beams and perfect vortex beams with varying topological charges. A comparison between the observed depolarization trends for the two classes of OAM-carrying beams suggests that the robust scattering properties of the LG beams originate from the intensity profile while the phase profile does not seem to play a major role in the stronger survival of OAM-carrying beam in turbid media.","PeriodicalId":16826,"journal":{"name":"Journal of Physics B: Atomic, Molecular and Optical Physics","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141608489","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

The electron affinity of rubidium: a state selective measurement 铷的电子亲和力：状态选择性测量

IF 1.6 4区物理与天体物理

Journal of Physics B: Atomic, Molecular and Optical Physics Pub Date : 2024-07-11 DOI: 10.1088/1361-6455/ad5e25

Annie Ringvall-Moberg, Miranda Nichols, José E Navarro Navarrete, Uldis Bērziņš, Viola C D’mello, Julia Karls, Di Lu, Yazareth Peña Rodríguez, Rachel Poulose, Andrea Morales Rodríguez, Keerthana Ravi, Meera Ramachandran, Vitali Zhaunerchyk, Dag Hanstorp and David Leimbach

{"title":"The electron affinity of rubidium: a state selective measurement","authors":"Annie Ringvall-Moberg, Miranda Nichols, José E Navarro Navarrete, Uldis Bērziņš, Viola C D’mello, Julia Karls, Di Lu, Yazareth Peña Rodríguez, Rachel Poulose, Andrea Morales Rodríguez, Keerthana Ravi, Meera Ramachandran, Vitali Zhaunerchyk, Dag Hanstorp and David Leimbach","doi":"10.1088/1361-6455/ad5e25","DOIUrl":"https://doi.org/10.1088/1361-6455/ad5e25","url":null,"abstract":"Negative ions, which are formed when an electron is attached to a neutral system, are unique quantum systems. The lack of a long-range Coulomb force causes the inter-electronic interactions to become relatively more important. As a consequence, the independent particle model, which adequately describes atomic structure under normal conditions, breaks down. The alkali negative ions, with a closed valence s-shell, are among the simplest anionic systems. Hence, they can favorably be used to benchmark atomic theory. In this work, we have determined the electron affinity of 85Rb by measuring the relative partial photodetachment cross section of the negative ion, leaving the residual atom in the 5p excited state. Resonance ionization spectroscopy allows for state selectivity and the ability to measure the Wigner s-wave threshold onset of the photodetachment process. The electron affinity of 85Rb was determined to be 485.887(6) meV.","PeriodicalId":16826,"journal":{"name":"Journal of Physics B: Atomic, Molecular and Optical Physics","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141608491","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