Dataset in support of the paper 'Supertoroidal light pulses as electromagnetic skyrmions propagating in free space

This dataset supports the following publication: Shen, Y., Hou, Y., Papasimakis, N. et al. Supertoroidal light pulses as electromagnetic skyrmions propagating in free space. Nat Commun 12, 5891 (2021). https://doi.org/10.1038/s41467-021-26037-w This dataset contains: - Fig. 1 presents plots of the spatial profiles of the real parts of electric fields of Equation (4) of the two pulses of α=1 and α=5 for q2=100q1 and t = 0, ±q2/(4c), and ±q2/(2c). - Fig. 2a-b present plots of the isoline plots of the electric fields of Equation (4) in the x-z plane for the two pulses shown in Fig.1. - Fig. 3a-b present plots of isoline and arrow plots of the magnetic fields of Equations (5,6) in the x-z plane for the two pulses shown in Fig.1. - Fig. 4a-b present plots of contour and arrow plots of the Poynting vector fields in the x-z plane for the two pulses shown in Fig.1. - Fig. 5a-b present plots of the isoline plot of the logarithm distributions of electric and magnetic fields in the x-z plane for for the pulse of the real part of Equations (4-6) for q2=100q1, t = 0, and α=20. - Fig. 6a-b presents the numbers and positions (a and b) of on-axis saddle-singularities of the magnetic field of the pulse in Fig.5 within the range of z 2 [0; 80q1], versus α. The authors acknowledge the supports of the MOE Singapore (MOE2016-T3-1-006), the UKs Engineering and Physical Sciences Research Council (grant EP/M009122/1, Funder Id: http://dx.doi.org/10.13039/501100000266), the European Research Council (Advanced grant FLEET-786851, Funder Id: http://dx.doi.org/10.13039/501100000781), and the Defense Advanced Research Projects Agency (DARPA) under the Nascent Light Matter Interactions program.本数据集支撑以下学术成果：Shen Y、Hou Y、Papasimakis N. 等人发表于《Nature Communications》2021年第12卷第5891页的论文《作为自由空间中传播的电磁斯格明子（electromagnetic skyrmions）的超环光脉冲》，DOI: 10.1038/s41467-021-26037-w。本数据集包含如下内容： - 图1展示了满足q₂=100q₁的α=1与α=5的两个脉冲，在t=0、±q₂/(4c)及±q₂/(2c)时刻的式(4)电场实部的空间分布曲线。 - 图2a-b展示了对应图1中两个脉冲的式(4)所描述电场在x-z平面内的等值线分布图。 - 图3a-b展示了对应图1中两个脉冲的式(5)、(6)所描述磁场在x-z平面内的等值线与箭头矢量分布图。 - 图4a-b展示了对应图1中两个脉冲的坡印廷矢量（Poynting vector）场在x-z平面内的等高线与箭头矢量分布图。 - 图5a-b展示了满足q₂=100q₁、t=0、α=20的脉冲，其式(4-6)实部对应的电场与磁场的对数分布在x-z平面内的等值线图。 - 图6a-b展示了在z∈[0; 80q₁]范围内，图5中脉冲的磁场的轴上鞍点奇点的数量与位置（分别对应子图a与b）随α的变化关系。本数据集作者感谢新加坡教育部（MOE2016-T3-1-006）、英国工程与物理科学研究委员会（项目编号EP/M009122/1，资助方编号：http://dx.doi.org/10.13039/501100000266）、欧洲研究理事会（高级资助项目FLEET-786851，资助方编号：http://dx.doi.org/10.13039/501100000781）以及美国国防高级研究计划局（DARPA）主导的「新生光物质相互作用（Nascent Light Matter Interactions）」项目的支持。