Space charge influences significantly the energy storage and insulation of dielectric materials, yet its distribution in micron-scale films remains poorly understood due to measurement limitations. Here, the authors utilize picosecond laser induced pressure-wave propagation technology to achieve high-resolution mapping, revealing insights into charge distribution and guiding the development of robust dielectrics for diverse applications.
- Jingquan Zheng
- Bangdou Huang
- Youping Tu