The 3-D current density and 2-D magnetic fields during the pinch simulation. In the 3D image, the red color represents positive current, while the blue color represents negative current. The 2D image illustrates the magnetic field. (IMAGE)
Caption
The 3-D current density and 2-D magnetic fields during the pinch simulation. In the 3D image, the red color represents positive current, while the blue color represents negative current. The 2D image illustrates the magnetic field. The x-positive direction aligns with the laser propagation and the axial direction of the nanowire, whereas the y and z directions correspond to the radial directions of the nanowire.
When irradiated by the ultrashort, high-intensity laser pulses, the atoms inside the wire undergo field ionization. The ionization process leads to a considerable potential difference on the surface of nanowire. This potential disparity is balanced by a significant return current flowing across the nanowire's surface, maintaining quasi-neutrality. Due to the extremely high current density, the induced magnetic field around the nanowire is also significant. This quasi-static magnetic field exerts a J×B force on both inner and outer current (electrons) of the nanowire.
Credit
Guo-Qiang Zhang
Usage Restrictions
Credit must be given to the creator. Only noncommercial uses of the work are permitted.
License
CC BY-NC