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The main factor of laser induced damage is the modulation caused by the scratch in the subsurface of the fused silica. The three-dimensional Hertzian conical scratch (HCS) model on the exit surface is establised in this article. Three-dimensional finite-difference time-domain method is used to calculate and simulate the electric field intensity distribution in the vicinity of HCS. The effects of depth, radius and gradient angle of the HCS on incident light field modulation are analyzed, respectively. The results show that the electric field enhancement in the center of HCS is the largest. This area is apt to be damaged. The maximal electric field intensity in the fused silica will be enhanced as the depth of the HCS changes from λ to 19λ/2. The fused silica is liable to be damaged while the radius of HCS is below 15λ. When the radius is larger than 175λ, the maximal electric fields in the fused silica tend to be 2.5 V/m. And the maximal electric fields are independent on the radius. The effect of light intensity enhancement is more obviously when total internal reflection occurs between internal interface of HCS and the rear surface of fused silica.
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Keywords:
- three-dimesitional finite-difference time-domain /
- Hertzian concial scratch /
- electric field distribution /
- numerical simulation
[1] ［1］Chen F, Meng S X 1998 Phys. Prog. 18 187 (in Chinese) ［陈飞、 孟绍贤 1998 物理学进展 18 187］
[2] ［2］Wang Y 2005 M. S. Dissertation (Mianyang: China Academy of Engineering Physics) (in Chinese) ［王毅 2005 硕士学位论文 (绵阳： 中国工程物理研究院)］
[3] ［3］Glebov F B 2002 Proc. SPIE 4679 321
[4] ［4］Sun C W, Lu Q S, Fan Z X 2002 Laser Irradiation Effect (Beijing: National Defense Industry Press) p265 (in Chinese) ［孙承纬、 陆启生、 范正修 2002 激光辐照效应 (北京： 国防工业出版社) 第265页］
[5] ［5］Wang Y, Xu Q, Chai L Q 2005 High Power Laser Part. Beams 17 67 (in Chinese) ［王毅、 许乔、 柴立群 2005 强激光与粒子束 17 67］
[6] ［6］Feit M D, Rubenchik A M 2004 Proc. SPIE 5273 264
[7] ［7］Chen X Q, Zu X T, Zheng W G, Jiang X D, Lü H B, Ren H, Zhang Y Z, Liu C M 2006 Acta Phys. Sin. 55 1201 (in Chinese) ［陈习权、 祖小涛、 郑万国、 蒋晓东、 吕海兵、 任寰、 张艳珍、 刘春明 2006 55 1201］
[8] ［8］Bonneau F, Combis P, Pujols A 2003 Proc. SPIE 4932 250
[9] ［9］Zhang D M, Hou S P, Guan L, Zhong Z C, Li Z H, Yang F X, Zheng K Y 2004 Acta Phys. Sin. 53 2237 (in Chinese) ［张端明、 侯思普、 关丽、 钟志成、 李智华、 杨凤霞、 郑克玉 2004 53 2237］
[10] ］Tian D B, Zu X T, Yuan X D 2007 High Power Laser Part. Beams 19 1547 (in Chinese) ［田东斌、 祖小涛、 袁晓东 2007 强激光与粒子束 19 1547］
[11] ］Tian D B, Yuan X D, Zu X T 2008 High Power Laser Part. Beams 20 319 (in Chinese) ［田东斌、 袁晓东、 祖小涛 2008 强激光与粒子束 20 319］
[12] ］Génin F Y, Salleo A, Pistor T V 2001 J. Opt. Soc. Am. A 18 2607
[13] ］Ge D B, Yan Y B 2002 Electro-magnetic Wave and Finite-Diffevence Fince-Dorucion (Xi’an: Xidian University Press) p14 (in Chinese) ［葛德彪、 闫玉波 2002 电磁波时域有限差分方法 (西安: 西安电子科技大学出版社) 第14页］
[14] ］Battersby C L 1999 Proc. SPIE 3578 446
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[1] ［1］Chen F, Meng S X 1998 Phys. Prog. 18 187 (in Chinese) ［陈飞、 孟绍贤 1998 物理学进展 18 187］
[2] ［2］Wang Y 2005 M. S. Dissertation (Mianyang: China Academy of Engineering Physics) (in Chinese) ［王毅 2005 硕士学位论文 (绵阳： 中国工程物理研究院)］
[3] ［3］Glebov F B 2002 Proc. SPIE 4679 321
[4] ［4］Sun C W, Lu Q S, Fan Z X 2002 Laser Irradiation Effect (Beijing: National Defense Industry Press) p265 (in Chinese) ［孙承纬、 陆启生、 范正修 2002 激光辐照效应 (北京： 国防工业出版社) 第265页］
[5] ［5］Wang Y, Xu Q, Chai L Q 2005 High Power Laser Part. Beams 17 67 (in Chinese) ［王毅、 许乔、 柴立群 2005 强激光与粒子束 17 67］
[6] ［6］Feit M D, Rubenchik A M 2004 Proc. SPIE 5273 264
[7] ［7］Chen X Q, Zu X T, Zheng W G, Jiang X D, Lü H B, Ren H, Zhang Y Z, Liu C M 2006 Acta Phys. Sin. 55 1201 (in Chinese) ［陈习权、 祖小涛、 郑万国、 蒋晓东、 吕海兵、 任寰、 张艳珍、 刘春明 2006 55 1201］
[8] ［8］Bonneau F, Combis P, Pujols A 2003 Proc. SPIE 4932 250
[9] ［9］Zhang D M, Hou S P, Guan L, Zhong Z C, Li Z H, Yang F X, Zheng K Y 2004 Acta Phys. Sin. 53 2237 (in Chinese) ［张端明、 侯思普、 关丽、 钟志成、 李智华、 杨凤霞、 郑克玉 2004 53 2237］
[10] ］Tian D B, Zu X T, Yuan X D 2007 High Power Laser Part. Beams 19 1547 (in Chinese) ［田东斌、 祖小涛、 袁晓东 2007 强激光与粒子束 19 1547］
[11] ］Tian D B, Yuan X D, Zu X T 2008 High Power Laser Part. Beams 20 319 (in Chinese) ［田东斌、 袁晓东、 祖小涛 2008 强激光与粒子束 20 319］
[12] ］Génin F Y, Salleo A, Pistor T V 2001 J. Opt. Soc. Am. A 18 2607
[13] ］Ge D B, Yan Y B 2002 Electro-magnetic Wave and Finite-Diffevence Fince-Dorucion (Xi’an: Xidian University Press) p14 (in Chinese) ［葛德彪、 闫玉波 2002 电磁波时域有限差分方法 (西安: 西安电子科技大学出版社) 第14页］
[14] ］Battersby C L 1999 Proc. SPIE 3578 446
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