物理学报2012，Vol.61Issue(12)：319-330,12.
裂纹或气泡对熔石英损伤修复坑场调制的近场模拟
Near-field modulated simulation of repaired site contained crack or bubble in fused silica subsurface
摘要
Abstract
Three-dimensional （3D） model of Gaussian repaired site contained crack or bubble is establishd, and 3D finite-difference timedomain method is used to simulate near-field modulation of 355 nm laser incidence by those defects on fused silica rear-surface. The results show that we should avoid any unrepaired cracks, especially cracks with incident angle of 65~, and the size of bubbles should be less than 5 ,k. All of the above can contribute to the weakening of the modulation around repaired pit. When crack or bubble distributes in the near-surface area （〈 3 ,k） and close to the edge of pit ring, the field modulation is obvious. With the increasing of lateral gap, there will be a maximum due to electric field fluctuations near the surface area, especially when cracks are contained. And the electric field gradually stabilized when lateral gap is far from the surface. As the vertical gap increases, the number of large electric field grid points decreases, and stabilized oscillation emerges when vertical gap is larger than 3 ）,. If cracks or bubbles are located below Gauss repaired sites within a few wavelengths, its depth seems to be enlarged under irradiation.关键词
熔石英/修复坑/激光诱导损伤/时域有限差分Key words
fused silica/repaired damage site/laser-induced damage/FDTD分类
数理科学引用本文复制引用
章春来,刘春明,向霞,戴威,王治国,李莉,袁晓东,贺少勃,祖小涛..裂纹或气泡对熔石英损伤修复坑场调制的近场模拟[J].物理学报,2012,61(12):319-330,12.基金项目
国家自然科学基金青年科学基金（批准号：10904008）,和国家自然科学基金委员会一中国工程物理研究院联合基金（批准号：11076008）和中央高校基本科研基金（批准号：ZYGX2009X007,ZYGX2010J045,ZYGX2011J043）资助的课题. （）
