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裂纹、气孔和吸收性夹杂物对透明电介质表面激光损伤阈值的作用。

Role of cracks, pores, and absorbing inclusions on laser induced damage threshold at surfaces of transparent dielectrics.

作者信息

Bloembergen N

出版信息

Appl Opt. 1973 Apr 1;12(4):661-4. doi: 10.1364/AO.12.000661.

DOI:10.1364/AO.12.000661
PMID:20125371
Abstract

The concentration of the electric field strength in the neighborhood of micropores and cracks may lower the nominal external intensity for electric avalanche breakdown by a factor 2-100 depending on the geometry of the crack and the dielectric constant. The presence of absorbing inclusions at the edge of microcracks will often be the dominant mechanism giving the lowest surface damage threshold. Inclusions and cracks with characteristic dimensions less than about 10(-6) cm will not lower the breakdown threshold appreciably.

摘要

微孔和裂纹附近的电场强度集中可能会使电雪崩击穿的标称外部强度降低2至100倍，这取决于裂纹的几何形状和介电常数。微裂纹边缘存在吸收性夹杂物通常将是导致最低表面损伤阈值的主要机制。特征尺寸小于约10^(-6)厘米的夹杂物和裂纹不会明显降低击穿阈值。

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