光学材料亚表面缺陷处强激光电磁场分布的3维模拟
Three-dimensional numerical simulation of light intensity distribution in vicinity of subsurface defect
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摘要: 利用时域有限差分法求解麦克斯韦旋度方程，研究了光学材料表面缺陷对入射激光场的调制作用，建立了亚表面缺陷的3维模型。以长方体表面缺陷为例，对缺陷附近的光场分布进行了3维数值计算，给出了电场强度3维分布图和缺陷不同尺寸时的最大电场强度。研究表明，相对于2维简化情况，3维表面缺陷对强激光电磁场的调制作用更加明显。
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关键词:
- 激光损伤 /
- 亚表面缺陷 /
- 电磁场时域有限差分法 /
- 光场调制 /
- 3维模拟
Abstract: In this paper, the modulation of light field by the subsurface defects is investigated in detail by solving Maxwell equations employing the finite-difference time-domain method. Meanwhile, the model of three-dimensional defect is set up. Taking cuboid defect as an example, the three-dimensional electromagnetic intensity distribution around the defect is simulated. The maximum electronic field intensity of different defect three dimensional numerical simulation is given. The results show modulation of three-dimensional defect to light intensity is more distinct than that of two-dimensional defect. -
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