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Correlations in strong-field-emitted ultrashort electron pulses from metal needle tips 金属针尖强场发射超短电子脉冲的相关性
IF 1.7 4区 物理与天体物理
Laser Physics Letters Pub Date : 2024-02-29 DOI: 10.1088/1612-202x/ad2b5a
S Meier, J Heimerl, P Hommelhoff
{"title":"Correlations in strong-field-emitted ultrashort electron pulses from metal needle tips","authors":"S Meier, J Heimerl, P Hommelhoff","doi":"10.1088/1612-202x/ad2b5a","DOIUrl":"https://doi.org/10.1088/1612-202x/ad2b5a","url":null,"abstract":"When two electrons are emitted from a metal needle tip with the help of femtosecond laser pulses, they show a strong anticorrelation signal in the energy domain. Depending on the wavelength and intensity of the driving laser pulses, the electron emission process can be either in a perturbative regime, like single- or multi-photon photoemission, or in the strong-field regime, where emission is dominated by the instantaneous electric field of the laser pulse, or in the intermediate regime. Here, we report on the two-electron anticorrelation signal and how it evolves from the multiphoton toward the strong-field emission regime. We show that in both cases, the resulting anticorrelation signal can be well explained by semi-classical simulations using a point-particle model, thus the dynamics is dominated by the center-of-mass dynamics of the individual electrons. However, the actual emission process of multiple interacting electrons requires improved quantum mechanical models and therefore remains the subject of future work.This paper is part of the Special Topic Collection: papers from the 31th Annual International Laser Physics Workshop 2023 (LPHYS 2023).","PeriodicalId":17940,"journal":{"name":"Laser Physics Letters","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140315796","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
Orbital angular momentum sensing of composite vortex light in a single-layer graphene system 单层石墨烯系统中复合涡旋光的轨道角动量感应
IF 1.7 4区 物理与天体物理
Laser Physics Letters Pub Date : 2024-02-26 DOI: 10.1088/1612-202x/ad2920
S I S Al-Hawary, Farag M A Altalbawy, C Rodriguez-Benites, A Kumar, Wesam R Kadhum, N Zaurbekova, H A Abbas, S J Shoja, A Alawadi, R Sivaraman
{"title":"Orbital angular momentum sensing of composite vortex light in a single-layer graphene system","authors":"S I S Al-Hawary, Farag M A Altalbawy, C Rodriguez-Benites, A Kumar, Wesam R Kadhum, N Zaurbekova, H A Abbas, S J Shoja, A Alawadi, R Sivaraman","doi":"10.1088/1612-202x/ad2920","DOIUrl":"https://doi.org/10.1088/1612-202x/ad2920","url":null,"abstract":"This paper explores the impact of orbital angular momentum (OAM) in composite vortex light on the absorption and dispersion characteristics of a weak probe light interacting with a single-layer graphene system. Through systematic investigation, we demonstrate the exceptional control achievable over absorption and dispersion profiles by manipulating the OAM of light. Under resonance conditions for the probe light, transparent regions emerge in the spatial profile of probe absorption, and the number of these transparent regions can be precisely regulated by adjusting the OAM number of the composite vortex light. Conversely, in the case of off-resonance probe light, amplified regions surface in the absorption spectrum, with the number of these regions controllable by the OAM state of the composite vortex light. These findings hold significant implications for optical communication systems, offering a valuable tool for the detection and measurement of the OAM number of composite vortex light, and paving the way for advancements in tailored signal processing and communication technologies.","PeriodicalId":17940,"journal":{"name":"Laser Physics Letters","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140003206","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 violet laser irradiation influence on the dispersive properties of the PVA/MO composite thick 紫激光辐照对 PVA/MO 复合厚材分散特性的影响
IF 1.7 4区 物理与天体物理
Laser Physics Letters Pub Date : 2024-02-26 DOI: 10.1088/1612-202x/ad291e
Sarah Maysam T, Nihal A AbdulWahhab, Addnan H Al-Arajiy
{"title":"The violet laser irradiation influence on the dispersive properties of the PVA/MO composite thick","authors":"Sarah Maysam T, Nihal A AbdulWahhab, Addnan H Al-Arajiy","doi":"10.1088/1612-202x/ad291e","DOIUrl":"https://doi.org/10.1088/1612-202x/ad291e","url":null,"abstract":"Polyvinyl alcohol (PVA) polymer, methyl orange (MO) and their composite was dissolved in water in order to prepare films with different thickness by casting method. The films were irradiated by a violet laser with a wavelength 405 nm for different times (0, 10, 20, 30 and 40) minute. The dispersion parameters were calculated before and after exposure to the laser using the Wemple–DiDomenico method. Dispersion energy (<italic toggle=\"yes\">E</italic>\u0000<sub>d</sub>) and the single oscillator energy of electronic transition (<italic toggle=\"yes\">E</italic>\u0000<sub>o</sub>) were increased with increasing the irradiating time for PVA, MO and PVA/MO thick films. This is useful to modify geometrical and optical specifications for materials which has many applications especially in the medical field. The Urbach energy also can be controlled by the irradiation times since it decreased with increasing the laser irradiation time which can be used to enhance the structure of the material.","PeriodicalId":17940,"journal":{"name":"Laser Physics Letters","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140003203","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
Weighted monogamy and polygamy relations 加权一夫一妻制和一夫多妻制的关系
IF 1.7 4区 物理与天体物理
Laser Physics Letters Pub Date : 2024-02-23 DOI: 10.1088/1612-202x/ad2921
Yue Cao, Naihuan Jing, Yiling Wang
{"title":"Weighted monogamy and polygamy relations","authors":"Yue Cao, Naihuan Jing, Yiling Wang","doi":"10.1088/1612-202x/ad2921","DOIUrl":"https://doi.org/10.1088/1612-202x/ad2921","url":null,"abstract":"This research offers a comprehensive approach to strengthening both monogamous and polygamous relationships within the context of quantum correlations in multipartite quantum systems. We present <italic toggle=\"yes\">the most stringent</italic> bounds for both monogamy and polygamy in multipartite systems compared to recently established relations. We show that whenever a bound is given (named it monogamy or polygamy), our bound indexed by some parameter <italic toggle=\"yes\">s</italic> will always be stronger than the given bound. The study includes detailed examples, highlighting that our findings exhibit greater strength across all existing cases in comparison.","PeriodicalId":17940,"journal":{"name":"Laser Physics Letters","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140003117","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
Flexible preparation of the W state via the GRAPE algorithm in a nanoring-quantum-dot system 在纳米量子点系统中通过 GRAPE 算法灵活制备 W 态
IF 1.7 4区 物理与天体物理
Laser Physics Letters Pub Date : 2024-02-22 DOI: 10.1088/1612-202x/ad2923
Zhen Chen, Zhi-Cheng Shi, Jie Song, Bi-Hua Huang, Yan Xia
{"title":"Flexible preparation of the W state via the GRAPE algorithm in a nanoring-quantum-dot system","authors":"Zhen Chen, Zhi-Cheng Shi, Jie Song, Bi-Hua Huang, Yan Xia","doi":"10.1088/1612-202x/ad2923","DOIUrl":"https://doi.org/10.1088/1612-202x/ad2923","url":null,"abstract":"In this paper, we put forward a scheme for flexibly preparing W states in the presence of detunings and asymmetric couplings in a nanoring-quantum-dot (nanoring-QD) system. Based on the gradient ascent pulse engineering algorithm, the coupling strength modulation (CSM) and the energy level modulation (ELM) methods are proposed, respectively. In the CSM method, the waveforms of the coupling strengths are properly designed to compensate for detunings, thus the decline on the fidelity is effectively suppressed. For the asymmetric couplings, a high-fidelity W state can be generated by the ELM method, which alters the energy levels of QDs in a desired manner. Finally, we generalize the current scheme to realize the preparation of <italic toggle=\"yes\">N</italic>-particle W states in nanoring-QD systems.","PeriodicalId":17940,"journal":{"name":"Laser Physics Letters","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140003121","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
Sub-50 fs pulses generation from an all-fiber monolithic gain-managed nonlinear amplifier with CFBG-based pre-compressor 利用基于 CFBG 的预压缩器从全光纤单片增益管理非线性放大器生成 50 fs 以下脉冲
IF 1.7 4区 物理与天体物理
Laser Physics Letters Pub Date : 2024-02-21 DOI: 10.1088/1612-202x/ad291f
Qianglong Li, Feng Li, Hongjun Liu, Wei Zhao, Xue Cao, Hualong Zhao, Yishan Wang, Wenlong Wen, Jinhai Si
{"title":"Sub-50 fs pulses generation from an all-fiber monolithic gain-managed nonlinear amplifier with CFBG-based pre-compressor","authors":"Qianglong Li, Feng Li, Hongjun Liu, Wei Zhao, Xue Cao, Hualong Zhao, Yishan Wang, Wenlong Wen, Jinhai Si","doi":"10.1088/1612-202x/ad291f","DOIUrl":"https://doi.org/10.1088/1612-202x/ad291f","url":null,"abstract":"We demonstrate an all-fiber monolithic laser source from a gain-managed nonlinear (GMN) fiber amplifier with a CFBG-based pre-compressor that generates high-contrast pulses with a repetition rate of 80 MHz, average power of 1.6 W, and pulse duration of sub-50 fs. The compressed pulse quality can be optimized by tuning the parameters of the seed pulses injected into the GMN amplifier by controlling the pump power of the fiber pre-amplifier. This compact and cost-effective laser system is a simplified design of the GMN amplification-based femtosecond fiber laser systems. With alignment-free characteristics in the amplifiers and clean compressed pulses, it is easy to assemble and use in applications such as multi-photon microscopy.","PeriodicalId":17940,"journal":{"name":"Laser Physics Letters","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140003205","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
Quasi-classical dynamics of a charged particle under conditions of ionization losses in a weak magnetic field 带电粒子在弱磁场中电离损耗条件下的准经典动力学
IF 1.7 4区 物理与天体物理
Laser Physics Letters Pub Date : 2024-02-21 DOI: 10.1088/1612-202x/ad2925
S V Sazonov
{"title":"Quasi-classical dynamics of a charged particle under conditions of ionization losses in a weak magnetic field","authors":"S V Sazonov","doi":"10.1088/1612-202x/ad2925","DOIUrl":"https://doi.org/10.1088/1612-202x/ad2925","url":null,"abstract":"The quasi-classical dynamics of a charged particle in a weak magnetic field in the presence of dissipative losses caused by ionization of the medium is studied. The approximate approach proposed here is a generalization of the Caldirola—Kanai method for quantizing the translational motion of particles in dissipative media. It is shown that a weak curvature of a classical trajectory by the magnetic field is accompanied by an isotropic increase of uncertainty of the particle coordinates to the some maximum value at the moment the localized probability density wave packet stops. The limitation of the increase of coordinate uncertainty is due to irreversible ionization losses.","PeriodicalId":17940,"journal":{"name":"Laser Physics Letters","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140003212","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
Spatially varying optical characteristics in quantum-dot molecules through interdot tunneling 量子点分子通过点间隧道实现空间变化的光学特性
IF 1.7 4区 物理与天体物理
Laser Physics Letters Pub Date : 2024-02-15 DOI: 10.1088/1612-202x/ad26ed
R. O. Saleh, M S Mohammed, S. Askar, N. S. A. Darwish, W. R. Kadhum, M. L. Shaghnab, A A Ibrahim, A. Kumar, A. Elawady, A. A. Omran
{"title":"Spatially varying optical characteristics in quantum-dot molecules through interdot tunneling","authors":"R. O. Saleh, M S Mohammed, S. Askar, N. S. A. Darwish, W. R. Kadhum, M. L. Shaghnab, A A Ibrahim, A. Kumar, A. Elawady, A. A. Omran","doi":"10.1088/1612-202x/ad26ed","DOIUrl":"https://doi.org/10.1088/1612-202x/ad26ed","url":null,"abstract":"\u0000 In this paper, we investigate the spatially dependent absorption characteristics in structurally asymmetric quantum-dot molecules (QDMs), characterized by four energy levels interacting with position-dependent beams and varying system parameters. We explore the effects of detuning, standing wave intensity, and the relative phase of applied fields on the absorption patterns within the medium. A diverse array of patterns emerges, including cross-like structures, ring-like formations, and localized absorption maxima, illustrating the intricate interplay between these parameters and the spatial distribution of absorption features. The introduction of a vortex-shaped control field adds a new dimension to the study, revealing azimuthal dependence and providing a novel perspective for manipulating absorption and gain properties based on the orbital angular momentum of the control field. This work contributes to a comprehensive understanding of the intricate dynamics governing spatially dependent absorption in QDMs, offering valuable insights for controlled manipulation and practical applications in quantum systems.","PeriodicalId":17940,"journal":{"name":"Laser Physics Letters","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139775728","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
Spatially varying optical characteristics in quantum-dot molecules through interdot tunneling 量子点分子通过点间隧道实现空间变化的光学特性
IF 1.7 4区 物理与天体物理
Laser Physics Letters Pub Date : 2024-02-15 DOI: 10.1088/1612-202x/ad26ed
R. O. Saleh, M S Mohammed, S. Askar, N. S. A. Darwish, W. R. Kadhum, M. L. Shaghnab, A A Ibrahim, A. Kumar, A. Elawady, A. A. Omran
{"title":"Spatially varying optical characteristics in quantum-dot molecules through interdot tunneling","authors":"R. O. Saleh, M S Mohammed, S. Askar, N. S. A. Darwish, W. R. Kadhum, M. L. Shaghnab, A A Ibrahim, A. Kumar, A. Elawady, A. A. Omran","doi":"10.1088/1612-202x/ad26ed","DOIUrl":"https://doi.org/10.1088/1612-202x/ad26ed","url":null,"abstract":"\u0000 In this paper, we investigate the spatially dependent absorption characteristics in structurally asymmetric quantum-dot molecules (QDMs), characterized by four energy levels interacting with position-dependent beams and varying system parameters. We explore the effects of detuning, standing wave intensity, and the relative phase of applied fields on the absorption patterns within the medium. A diverse array of patterns emerges, including cross-like structures, ring-like formations, and localized absorption maxima, illustrating the intricate interplay between these parameters and the spatial distribution of absorption features. The introduction of a vortex-shaped control field adds a new dimension to the study, revealing azimuthal dependence and providing a novel perspective for manipulating absorption and gain properties based on the orbital angular momentum of the control field. This work contributes to a comprehensive understanding of the intricate dynamics governing spatially dependent absorption in QDMs, offering valuable insights for controlled manipulation and practical applications in quantum systems.","PeriodicalId":17940,"journal":{"name":"Laser Physics Letters","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139835256","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
Generative adversarial neural network for 3D-hologram reconstruction 用于三维全息图重建的生成对抗神经网络
IF 1.7 4区 物理与天体物理
Laser Physics Letters Pub Date : 2024-02-14 DOI: 10.1088/1612-202x/ad26eb
Semen A Kiriy, Dmitry A. Rymov, Andrey S. Svistunov, A. Shifrina, R. Starikov, P. Cheremkhin
{"title":"Generative adversarial neural network for 3D-hologram reconstruction","authors":"Semen A Kiriy, Dmitry A. Rymov, Andrey S. Svistunov, A. Shifrina, R. Starikov, P. Cheremkhin","doi":"10.1088/1612-202x/ad26eb","DOIUrl":"https://doi.org/10.1088/1612-202x/ad26eb","url":null,"abstract":"\u0000 Neural-network-based reconstruction of digital holograms can improve the speed and the quality of micro- and macro-object images, as well as reduce the noise and suppress the twin image and the zero-order. Usually, such methods aim to reconstruct the 2D object image or amplitude and phase distribution. In this paper, we investigated the feasibility of using a generative adversarial neural network to reconstruct 3D-scenes consisting of a set of cross-sections. The method was tested on computer-generated and optically-registered digital inline holograms. It enabled the reconstruction of all layers of a scene from each hologram. The reconstruction quality is improved 1.8 times when compared to the U-Net architecture on the normalized standard deviation value.","PeriodicalId":17940,"journal":{"name":"Laser Physics Letters","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139779247","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
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