Pub Date : 2024-06-13DOI: 10.1088/0256-307x/41/7/074204
Houhui Yi, Xiaofeng Li, Junling Zhang, Xin Zhang, Guoli Ma
When pursuing femtosecond-scale ultrashort pulse optical communication, one cannot overlook higher-order nonlinear effects. Based on the fundamental theoretical model of the variable coefficient coupled high-order nonlinear Schrödinger equation (VCHNLSE), this paper explores the evolution of optical solitons in the presence of high-order nonlinear effects analytically. Besides, the interactions between two nearby optical solitons and the transmission of them in a nonuniform fiber are investigated. The stability of optical soliton transmission and interactions are found to be destroyed to varying degrees due to higher-order nonlinear effects. The outcomes will offer some theoretical references for achieving ultra-high energy optical solitons in the future.
{"title":"Higher-order nonlinear effects on optical soliton propagation and their interactions","authors":"Houhui Yi, Xiaofeng Li, Junling Zhang, Xin Zhang, Guoli Ma","doi":"10.1088/0256-307x/41/7/074204","DOIUrl":"https://doi.org/10.1088/0256-307x/41/7/074204","url":null,"abstract":"\u0000 When pursuing femtosecond-scale ultrashort pulse optical communication, one cannot overlook higher-order nonlinear effects. Based on the fundamental theoretical model of the variable coefficient coupled high-order nonlinear Schrödinger equation (VCHNLSE), this paper explores the evolution of optical solitons in the presence of high-order nonlinear effects analytically. Besides, the interactions between two nearby optical solitons and the transmission of them in a nonuniform fiber are investigated. The stability of optical soliton transmission and interactions are found to be destroyed to varying degrees due to higher-order nonlinear effects. The outcomes will offer some theoretical references for achieving ultra-high energy optical solitons in the future.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141348935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}
In comparison to bright pulses, better stability and not susceptible to losses, making dark pulses accessible for applications in such fields as signal processing, optics sensing and quantum communication. Here we investigate the dual-wavelength domain-wall (DW) dark pulse generation in a graded-index multimode fiber (GIMF) based anomalous dispersion single-mode fiber (SMF) laser for the first time, to the best of our knowledge. By optimizing intra-cavity nonlinearity and pulse polarization, the mode-locked states can evolve each other between bright pulses, dark pulses and bright-dark pulse pairs. The evolution mechanism among them may be relevant to the coherent mode superposition, spectral filtering, and mode selection in SMF-GIMF-SMF hybrid-fiber modulation device that affect the pulse formation and evolution in the temporal, frequency, and space domains respectively. These results provide a valuable reference for promoting the further development of the nonlinear optics and ultrafast optics, in which ultrafast photonic device, with low cost, simple manufacture as well as wide adaptability, as novel pulsed generation technique, plays vital role.
{"title":"Nonlinear multimodal interference as ultrafast photonic device for dual-wavelength DW dark pulse generation","authors":"Shan Wang, Bo-Le Song, Xinhe Dou, Feihong Qiao, Xiang Li, Jin-Bo Wang, Zhi-Guo Lv","doi":"10.1088/0256-307x/41/7/074203","DOIUrl":"https://doi.org/10.1088/0256-307x/41/7/074203","url":null,"abstract":"\u0000 In comparison to bright pulses, better stability and not susceptible to losses, making dark pulses accessible for applications in such fields as signal processing, optics sensing and quantum communication. Here we investigate the dual-wavelength domain-wall (DW) dark pulse generation in a graded-index multimode fiber (GIMF) based anomalous dispersion single-mode fiber (SMF) laser for the first time, to the best of our knowledge. By optimizing intra-cavity nonlinearity and pulse polarization, the mode-locked states can evolve each other between bright pulses, dark pulses and bright-dark pulse pairs. The evolution mechanism among them may be relevant to the coherent mode superposition, spectral filtering, and mode selection in SMF-GIMF-SMF hybrid-fiber modulation device that affect the pulse formation and evolution in the temporal, frequency, and space domains respectively. These results provide a valuable reference for promoting the further development of the nonlinear optics and ultrafast optics, in which ultrafast photonic device, with low cost, simple manufacture as well as wide adaptability, as novel pulsed generation technique, plays vital role.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141345202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}
Pub Date : 2024-06-11DOI: 10.1088/0256-307x/41/7/078501
Bin Chen, Yuantu Long, Yulin Nie, Ziyu Ling, Tianping Ma, Ruixuan Zhang, Yizheng Wu, Yongming Luo, Ningning Wang
Using micromagnetic simulations, in this study we demonstrate the tilted perpendicular anisotropy -induced spin-orbit ratchet effect. During spin-orbit torque (SOT)-induced magnetization switching, the critical currents required to switch between the two magnetization states (upward and downward magnetization) are asymmetric. In addition, in the nanowire structure, tilted anisotropy induces formation of tilted domain walls (DWs). The tilted DWs exhibit a ratchet behavior during motion. The ratchet effect during switching and DW motions can be tuned by changing the current direction with respect to the tilting direction of anisotropy. The ratchet motion of the DWs can be used to mimic the Leaky–Integrate–Fire function of a biological neuron, especially the asymmetric property of the “potential” and “reset” processes. Our results provide a full understanding of the influence of tilted perpendicular anisotropy on SOT-induced magnetization switching and DW motion, and are beneficial for design of further SOT-based devices.
在这项研究中，我们利用微磁模拟证明了倾斜垂直各向异性诱导的自旋轨道棘轮效应。在自旋轨道力矩（SOT）诱导的磁化切换过程中，在两种磁化状态（向上磁化和向下磁化）之间切换所需的临界电流是不对称的。此外，在纳米线结构中，倾斜各向异性诱导形成倾斜畴壁（DW）。倾斜畴壁在运动过程中表现出棘轮效应。通过改变相对于各向异性倾斜方向的电流方向，可以调整开关和 DW 运动过程中的棘轮效应。DW 的棘轮运动可用于模拟生物神经元的 "漏-并-火 "功能，尤其是 "电位 "和 "复位 "过程的不对称特性。我们的研究结果让人们充分了解了倾斜的垂直各向异性对 SOT 诱导的磁化切换和 DW 运动的影响，有利于设计更多基于 SOT 的器件。
{"title":"Tilted perpendicular anisotropy-induced spin-orbit ratchet effects","authors":"Bin Chen, Yuantu Long, Yulin Nie, Ziyu Ling, Tianping Ma, Ruixuan Zhang, Yizheng Wu, Yongming Luo, Ningning Wang","doi":"10.1088/0256-307x/41/7/078501","DOIUrl":"https://doi.org/10.1088/0256-307x/41/7/078501","url":null,"abstract":"\u0000 Using micromagnetic simulations, in this study we demonstrate the tilted perpendicular anisotropy -induced spin-orbit ratchet effect. During spin-orbit torque (SOT)-induced magnetization switching, the critical currents required to switch between the two magnetization states (upward and downward magnetization) are asymmetric. In addition, in the nanowire structure, tilted anisotropy induces formation of tilted domain walls (DWs). The tilted DWs exhibit a ratchet behavior during motion. The ratchet effect during switching and DW motions can be tuned by changing the current direction with respect to the tilting direction of anisotropy. The ratchet motion of the DWs can be used to mimic the Leaky–Integrate–Fire function of a biological neuron, especially the asymmetric property of the “potential” and “reset” processes. Our results provide a full understanding of the influence of tilted perpendicular anisotropy on SOT-induced magnetization switching and DW motion, and are beneficial for design of further SOT-based devices.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141357594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}
Fractional orbital angular momentum (OAM) vortex beams present a promising way to increase the data throughput in optical communication systems. Nevertheless, high-precision recognition of fractional OAM with different propagation distances remains a significant challenge. In this paper, we developed a convolutional neural network (CNN) method to realize high-resolution recognition of OAM modalities, leveraging asymmetric Bessel beams imbued with fractional OAM. Experimental results prove that our method achieves a recognition accuracy exceeding 94.3% for OAM modes, with an interval of 0.05, and maintains a high recognition accuracy above 92% across varying propagation distances. The findings of our research will be poised to significantly contribute to the deployment of fractional OAM beams within the domain of optical communications.
{"title":"High-resolution recognition of orbital angular momentum modes in asymmetric Bessel beams assisted by deep learning","authors":"Pengfei Xu, Xin Tong, Zishuai Zeng, Shuxi Liu, Daomu Zhao","doi":"10.1088/0256-307x/41/7/074201","DOIUrl":"https://doi.org/10.1088/0256-307x/41/7/074201","url":null,"abstract":"\u0000 Fractional orbital angular momentum (OAM) vortex beams present a promising way to increase the data throughput in optical communication systems. Nevertheless, high-precision recognition of fractional OAM with different propagation distances remains a significant challenge. In this paper, we developed a convolutional neural network (CNN) method to realize high-resolution recognition of OAM modalities, leveraging asymmetric Bessel beams imbued with fractional OAM. Experimental results prove that our method achieves a recognition accuracy exceeding 94.3% for OAM modes, with an interval of 0.05, and maintains a high recognition accuracy above 92% across varying propagation distances. The findings of our research will be poised to significantly contribute to the deployment of fractional OAM beams within the domain of optical communications.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141357715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}
Pub Date : 2024-06-07DOI: 10.1088/0256-307x/41/7/078201
Jianqun Wang, N. Zhao, Xiangxin Guo
The pursuit of high-energy cathode materials has been focused on raising the charging cut-off voltage of Nickel(Ni)-rich layered oxide cathode such as LiNi0.8Co0.1Mn0.1O2 (NCM811). However, the NCM811 suffers from rapid capacity fading upon cycling at cut-off voltage higher than 4.5 V, owing to their structural degradation and labile surface reactivity. Surface-coating with solid electrolytes has been recognized as an effective method to mitigate the performance failure of NCM811 at high voltage. Herein, the nano-sized Li6.4La3Ta0.6Zr1.4O12 (LLZTO) is uniformly coated on the surface of single-crystal NCM811 particles, accompanied with the longrange Ta5+ diffusion into the transition metal layer of NCM811 lattice. It is revealed that the LLZTO coating can not only inhibit the surface reactions of NCM811 with liquid electrolytes but also play an important role in suppressing the bulk microcracking within the NCM811 particles. The incorporation of Ta5+ ion expands the lattice spacing and thereby improves the homogeneity of the Li+ diffusion in the single-crystal NCM811, which alleviates the mechanical strain and intragranular cracks caused by nonuniform phases-transformation at high charging voltage. The synergy of surface protection and structural stabilization realized by LLZTO coating enables the NCM811- based lithium batteries to achieve a remarkable electrochemical performance. Typically, LLZTO coated NCM811 delivers a high reversible specific capacity of 202.1 mAh g-1 with an excellent capacity retention as high as 70 % over 1000 cycles upon charging to 4.5 V at 1 C.
{"title":"Long-cycle Lithium batteries with LiNi0.8Co0.1Mn0.1O2 cathodes above 4.5 V enabled by uniform coating of nanosized garnet electrolytes","authors":"Jianqun Wang, N. Zhao, Xiangxin Guo","doi":"10.1088/0256-307x/41/7/078201","DOIUrl":"https://doi.org/10.1088/0256-307x/41/7/078201","url":null,"abstract":"\u0000 The pursuit of high-energy cathode materials has been focused on raising the charging cut-off voltage of Nickel(Ni)-rich layered oxide cathode such as LiNi0.8Co0.1Mn0.1O2 (NCM811). However, the NCM811 suffers from rapid capacity fading upon cycling at cut-off voltage higher than 4.5 V, owing to their structural degradation and labile surface reactivity. Surface-coating with solid electrolytes has been recognized as an effective method to mitigate the performance failure of NCM811 at high voltage. Herein, the nano-sized Li6.4La3Ta0.6Zr1.4O12 (LLZTO) is uniformly coated on the surface of single-crystal NCM811 particles, accompanied with the longrange Ta5+ diffusion into the transition metal layer of NCM811 lattice. It is revealed that the LLZTO coating can not only inhibit the surface reactions of NCM811 with liquid electrolytes but also play an important role in suppressing the bulk microcracking within the NCM811 particles. The incorporation of Ta5+ ion expands the lattice spacing and thereby improves the homogeneity of the Li+ diffusion in the single-crystal NCM811, which alleviates the mechanical strain and intragranular cracks caused by nonuniform phases-transformation at high charging voltage. The synergy of surface protection and structural stabilization realized by LLZTO coating enables the NCM811- based lithium batteries to achieve a remarkable electrochemical performance. Typically, LLZTO coated NCM811 delivers a high reversible specific capacity of 202.1 mAh g-1 with an excellent capacity retention as high as 70 % over 1000 cycles upon charging to 4.5 V at 1 C.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141370938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}
Pub Date : 2024-06-07DOI: 10.1088/0256-307x/41/7/070301
Yiting Mao, Peigeng Zhong, Haiqing Lin, Xiaoqun Wang, Shijie Hu
The application of the eigenstate thermalization hypothesis to non-Hermitian quantum systems has become one of the most important topics in dissipative quantum chaos, recently giving rise to intense debates. The process of thermalization is intricate, involving many time-evolution trajectories in the reduced Hilbert space of the system. By considering two different expansion forms of the density matrices adopted in the biorthogonal and right-state time evolutions, we have derived two versions of the Gorini-Kossakowski-Sudarshan-Lindblad master equations describing the nonHermitian systems coupled to a bosonic heat bath in thermal equilibrium. By solving the equations, we have identified a suffcient condition for thermalization under both time evolutions, resulting in Boltzmann biorthogonal and right-eigenstate statistics, respectively. This finding implies that the recently proposed biorthogonal random matrix theory needs an appropriate revision. Moreover, we have exemplified the precise dynamics of thermalization and thermodynamic properties with test models.
{"title":"Diagnosing thermalization dynamics of non-Hermitian quantum systems via GKSL master equations","authors":"Yiting Mao, Peigeng Zhong, Haiqing Lin, Xiaoqun Wang, Shijie Hu","doi":"10.1088/0256-307x/41/7/070301","DOIUrl":"https://doi.org/10.1088/0256-307x/41/7/070301","url":null,"abstract":"\u0000 The application of the eigenstate thermalization hypothesis to non-Hermitian quantum systems has become one of the most important topics in dissipative quantum chaos, recently giving rise to intense debates. The process of thermalization is intricate, involving many time-evolution trajectories in the reduced Hilbert space of the system. By considering two different expansion forms of the density matrices adopted in the biorthogonal and right-state time evolutions, we have derived two versions of the Gorini-Kossakowski-Sudarshan-Lindblad master equations describing the nonHermitian systems coupled to a bosonic heat bath in thermal equilibrium. By solving the equations, we have identified a suffcient condition for thermalization under both time evolutions, resulting in Boltzmann biorthogonal and right-eigenstate statistics, respectively. This finding implies that the recently proposed biorthogonal random matrix theory needs an appropriate revision. Moreover, we have exemplified the precise dynamics of thermalization and thermodynamic properties with test models.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141370813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}
Pub Date : 2024-06-07DOI: 10.1088/0256-307x/41/7/074202
Xin Su, Biao-Bing Jin, Jiangshan Tang, Keyu Xia
Quantum nonreciprocity, such as nonreciprocal photon blockade, has attracted great attention due to its unique applications in quantum information processing. Its implementation primarily relies on rotating nonlinear systems, based on the Sagnac effect. Here, we propose an all-optical approach to achieve nonreciprocal photon blockade in an on-chip microring resonator coupled to a V-type Rb atom, which arises from the Zeeman splittings of the atomic hyperfine sublevels induced by the fictitious magnetic field of a circularly polarized control laser. The system manifests single-photon blockade or multi-photon tunneling when driven from opposite directions. This nonreciprocity results from the directional detunings between the countercirculating probe fields and the V-type atom, which does not require the mechanical rotation and facilitates integration. Our work opens up a new route to achieve on-chip integrable quantum nonreciprocity, enabling applications in chiral quantum technologies.
量子非互易性，如非互易光子封锁，因其在量子信息处理中的独特应用而备受关注。它的实现主要依赖于基于萨格纳克效应的旋转非线性系统。在这里，我们提出了一种全光学方法，在耦合到 V 型掺铒原子的片上微孔谐振器中实现非互易光子阻断，这种阻断是由圆偏振控制激光器的虚构磁场诱导的原子超线性子级的泽曼分裂引起的。当从相反方向驱动时，系统表现出单光子阻滞或多光子隧道现象。这种非互惠性源于反循环探针磁场与 V 型原子之间的定向调谐，无需机械旋转，有利于整合。我们的工作为实现片上可积分量子非互斥性开辟了一条新途径，使手性量子技术的应用成为可能。
{"title":"Nonreciprocal photon blockade based on Zeeman splittings induced by a fictitious magnetic field","authors":"Xin Su, Biao-Bing Jin, Jiangshan Tang, Keyu Xia","doi":"10.1088/0256-307x/41/7/074202","DOIUrl":"https://doi.org/10.1088/0256-307x/41/7/074202","url":null,"abstract":"\u0000 Quantum nonreciprocity, such as nonreciprocal photon blockade, has attracted great attention due to its unique applications in quantum information processing. Its implementation primarily relies on rotating nonlinear systems, based on the Sagnac effect. Here, we propose an all-optical approach to achieve nonreciprocal photon blockade in an on-chip microring resonator coupled to a V-type Rb atom, which arises from the Zeeman splittings of the atomic hyperfine sublevels induced by the fictitious magnetic field of a circularly polarized control laser. The system manifests single-photon blockade or multi-photon tunneling when driven from opposite directions. This nonreciprocity results from the directional detunings between the countercirculating probe fields and the V-type atom, which does not require the mechanical rotation and facilitates integration. Our work opens up a new route to achieve on-chip integrable quantum nonreciprocity, enabling applications in chiral quantum technologies.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141371607","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}
The 0.98(K0.5Na0.5)NbO3-0.02Ba(Nb0.5Co0.5)O3-δ ceramics with doped Ba2+ and Co2+ ions are fabricated, and the impacts of the thermal process are studied. Compared with the rapidly cooled (RC) sample, the slowly cooled (SC) sample possesses superior dielectric and ferroelectric properties, and an 11 K higher ferroelectric-paraelectric phase transition temperature, which can be attributed to the structural characteristics such as the grain size and the degree of anisotropy. Heat treatment can reversibly modulate the content of the oxygen vacancies, and in turn the ferroelectric hysteresis loops of the samples. Finally, robust and tunable ferroelectric property is achieved in SC samples with good structural integrity.
{"title":"Robust and tunable ferroelectricity in Ba/Co co-doped (K0.5Na0.5)NbO3 ceramics","authors":"Jiaxun Liu, Jielin Zha, Yulong Yang, Xiaomei Lu, Xueli Hu, Shuo Yan, Zijing Wu, F. Huang","doi":"10.1088/0256-307x/41/7/077701","DOIUrl":"https://doi.org/10.1088/0256-307x/41/7/077701","url":null,"abstract":"\u0000 The 0.98(K0.5Na0.5)NbO3-0.02Ba(Nb0.5Co0.5)O3-δ ceramics with doped Ba2+ and Co2+ ions are fabricated, and the impacts of the thermal process are studied. Compared with the rapidly cooled (RC) sample, the slowly cooled (SC) sample possesses superior dielectric and ferroelectric properties, and an 11 K higher ferroelectric-paraelectric phase transition temperature, which can be attributed to the structural characteristics such as the grain size and the degree of anisotropy. Heat treatment can reversibly modulate the content of the oxygen vacancies, and in turn the ferroelectric hysteresis loops of the samples. Finally, robust and tunable ferroelectric property is achieved in SC samples with good structural integrity.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141372654","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}
Pub Date : 2024-06-01DOI: 10.1088/1674-1056/ad43d4
Nan Bo, Nai-Yan Wang
Based on previously reported work, we propose a new method for calibrating image plate (IP) scanners, offering greater flexibility and convenience, which can be extended to the calibration tasks of various scanner models. This method was applied to calibrate the sensitivity of a GE Typhoon FLA 7000 scanner. Additionally, we performed a calibration of the spontaneous signal attenuation behavior for BAS-MS, BAS-SR, and BAS-TR type IPs under the 20±1 °C environmental conditions, and observed significant signal carrier diffusion behavior in BAS-MS IP. The calibration results lay a foundation for further research on the interaction between ultra-short, ultra-intense lasers and matter.
在之前报告工作的基础上，我们提出了一种校准图像平板（IP）扫描仪的新方法，该方法具有更大的灵活性和便利性，可扩展到各种型号扫描仪的校准任务中。我们采用这种方法校准了 GE Typhoon FLA 7000 扫描仪的灵敏度。此外，我们还对 BAS-MS、BAS-SR 和 BAS-TR 型 IP 在 20±1 °C 环境条件下的自发信号衰减行为进行了校准，并观察到 BAS-MS IP 中存在明显的信号载流子扩散行为。校准结果为进一步研究超短、超强激光与物质之间的相互作用奠定了基础。
{"title":"Imaging plate scanners calibration and the attenuation behavior of imaging plate signals","authors":"Nan Bo, Nai-Yan Wang","doi":"10.1088/1674-1056/ad43d4","DOIUrl":"https://doi.org/10.1088/1674-1056/ad43d4","url":null,"abstract":"Based on previously reported work, we propose a new method for calibrating image plate (IP) scanners, offering greater flexibility and convenience, which can be extended to the calibration tasks of various scanner models. This method was applied to calibrate the sensitivity of a GE Typhoon FLA 7000 scanner. Additionally, we performed a calibration of the spontaneous signal attenuation behavior for BAS-MS, BAS-SR, and BAS-TR type IPs under the 20±1 °C environmental conditions, and observed significant signal carrier diffusion behavior in BAS-MS IP. The calibration results lay a foundation for further research on the interaction between ultra-short, ultra-intense lasers and matter.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141503407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}
Pub Date : 2024-05-31DOI: 10.1088/0256-307x/41/7/077103
Yang Zhong, 阳 钟, Hongyu Yu, 宏宇 于, Jihui Yang, 吉辉 杨, Xingyu Guo, 星宇 郭, Hongjun Xiang, 红军 向, Xingao Gong and 新高 龚
While density functional theory (DFT) serves as a prevalent computational approach in electronic structure calculations, its computational demands and scalability limitations persist. Recently, leveraging neural networks to parameterize the Kohn–Sham DFT Hamiltonian has emerged as a promising avenue for accelerating electronic structure computations. Despite advancements, challenges such as the necessity for computing extensive DFT training data to explore each new system and the complexity of establishing accurate machine learning models for multi-elemental materials still exist. Addressing these hurdles, this study introduces a universal electronic Hamiltonian model trained on Hamiltonian matrices obtained from first-principles DFT calculations of nearly all crystal structures on the Materials Project. We demonstrate its generality in predicting electronic structures across the whole periodic table, including complex multi-elemental systems, solid-state electrolytes, Moiré twisted bilayer heterostructure, and metal-organic frameworks. Moreover, we utilize the universal model to conduct high-throughput calculations of electronic structures for crystals in GNoME datasets, identifying 3940 crystals with direct band gaps and 5109 crystals with flat bands. By offering a reliable efficient framework for computing electronic properties, this universal Hamiltonian model lays the groundwork for advancements in diverse fields, such as easily providing a huge data set of electronic structures and also making the materials design across the whole periodic table possible.
{"title":"Universal Machine Learning Kohn–Sham Hamiltonian for Materials","authors":"Yang Zhong, 阳 钟, Hongyu Yu, 宏宇 于, Jihui Yang, 吉辉 杨, Xingyu Guo, 星宇 郭, Hongjun Xiang, 红军 向, Xingao Gong and 新高 龚","doi":"10.1088/0256-307x/41/7/077103","DOIUrl":"https://doi.org/10.1088/0256-307x/41/7/077103","url":null,"abstract":"While density functional theory (DFT) serves as a prevalent computational approach in electronic structure calculations, its computational demands and scalability limitations persist. Recently, leveraging neural networks to parameterize the Kohn–Sham DFT Hamiltonian has emerged as a promising avenue for accelerating electronic structure computations. Despite advancements, challenges such as the necessity for computing extensive DFT training data to explore each new system and the complexity of establishing accurate machine learning models for multi-elemental materials still exist. Addressing these hurdles, this study introduces a universal electronic Hamiltonian model trained on Hamiltonian matrices obtained from first-principles DFT calculations of nearly all crystal structures on the Materials Project. We demonstrate its generality in predicting electronic structures across the whole periodic table, including complex multi-elemental systems, solid-state electrolytes, Moiré twisted bilayer heterostructure, and metal-organic frameworks. Moreover, we utilize the universal model to conduct high-throughput calculations of electronic structures for crystals in GNoME datasets, identifying 3940 crystals with direct band gaps and 5109 crystals with flat bands. By offering a reliable efficient framework for computing electronic properties, this universal Hamiltonian model lays the groundwork for advancements in diverse fields, such as easily providing a huge data set of electronic structures and also making the materials design across the whole periodic table possible.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141503316","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}
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