熔石英亚表面杂质颗粒附近光场调制的三维模拟

花金荣; 李莉; 向霞; 祖小涛

doi:10.7498/aps.60.044206

摘要

熔石英亚表面缺陷是光学材料低损伤阈值的主要因素之一.本文建立了熔石英亚表面三维球形杂质颗粒模型,采用三维时域有限差分方法对杂质附近的光场进行了数值模拟,分析了杂质的介电常数与尺寸对光强增强因子的影响,结果显示:介电常数小于熔石英的杂质,其光强增强因子不随尺寸、介电常数的改变而改变,均保持为4左右;当介电常数为6.0时,半径为1.5λ,2λ及2.5λ的杂质,相应的光强增强因子分别为50.1588,73.3904及102.9953,即增强因子随杂质尺寸的增大而增大;恰

关键词:

Abstract

One of the important factors of the low laser induced damage threshold is the defects in the subsurface of fused silica. The three-dimensional model of a spherical inclusion in the subsurface is established in this study. Three-dimensional finite-difference time-domain method is used to calculate and simulate the light field distribution in the vicinity of inclusions. The effects of dielectric constant and inclusion size are analyzed, separately. The results show that the light intensity enhancement factor (LIEF) does not change with the size and the dielectric constant of the inclusions when the dielectric constant is smaller than that of fused silica, where the LIEF is kept at about 4. When the dielectric constant is 6.0, the LIEFs are 50.1588, 73.3904 and 102.9953 for the inclusions with sizes of 1.5λ, 2λ and 2.5λ respectively. When the inclusion size is constant, the LIEF will increase with the increase of dielectric constant. The light enhancement for the round inclusions is much higher than that for the ellipsoidal inclusions. Therefore, the round inclusions with large size and dielectric constant significantly enhance the electric field.

Keywords:

作者及机构信息

1.
电子科技大学物理电子学院,成都 610054

基金项目: 国家高技术研究发展计划(批准号:2007AA804233,2008AA8040508),电子科技大学青年基金重点项目(批准号:L08010401JX0806),国家自然科学基金和中国工程物理研究院联合基金(批准号:11070008)资助的课题.

Authors and contacts

1.
Institute of Physics and Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China

参考文献

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[3]	Liu F M, Zhang L D, Li G H 2005 Chin. Phys. 14 2145
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[8]	Liao L S, Bao X M, Zheng X Q, Li N S, Min N B 1996 Appl. Phys. Lett. 68 850
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[10]	Merkle L D, Kitriotis D 1988 Phys. Rev. B 38 1473
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[12]	Génin F Y, Salleo A, Pistor T V 2001 J. Opt. Soc. Am. A 18 2607
[13]	Rubenchik A M, Feit M D 2002 Proc. SPIE 4679 79
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[16]	Chen X Q, Zu X T, Zheng W G, Jiang X D, Liu C M 2006 Acta Phys. Sin. 55 1201 (in Chinese) [陈习权、祖小涛、郑万国、蒋晓东、刘春明 2006 物理学报 55 1201]
[17]	Xiang X, Chen M, Chen M Y, Zu X T, Zhu S, Wang L M 2010 Chin. Phys. B 19 018107
[18]	Li L, Lei Y, Xiao S Q 2009 High Power Laser and Particle Beams 21 936 (in Chinese)[李莉、雷雨、肖邵球 2009 强激光与粒子束 20 936] 〖19] Ge D B, Yan Y B 2002 Electro Magnetic Wave and FDTD (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]
[19]	Xue S W, Zu X T, Shao L X, Yuan Z L, Xiang X, Deng H 2008 Chin. Phys. 17 2240
[20]	Zhou Z X, Wang H L, Shen Y Q, Liu D J, Liu H, He S Y, Yang D Z 2008 Acta Phys. Sin. 57 592 (in Chinese) [周忠祥、王宏利、申艳青、刘大军、刘海、何世禹、杨德庄 2008 物理学报 57 592]

施引文献

[1]	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]
[2]	Chen F, Meng S X 1998 Physics Progress 18 187 (in Chinese) [陈飞、孟绍贤 1998 物理学进展 18 187]
[3]	Liu F M, Zhang L D, Li G H 2005 Chin. Phys. 14 2145
[4]	Bloembergen N 1973 Appl. Opt 12 661
[5]	Feit M D, Rubenchik A M 2004 Proc. SPIE 5273 264
[6]	Liu C M, Zu X T, Wei Q M, Wang L M 2007 Chin. Phys. 16 95
[7]	Xue S W, Zu X T 2007 Chin. Phys. 16 1119
[8]	Liao L S, Bao X M, Zheng X Q, Li N S, Min N B 1996 Appl. Phys. Lett. 68 850
[9]	Trupke T, Green M A, Wttrfel P, Altermatt P P, Wang A, Zhao J, Corkish R 2003 J. Appl. Phys. 94 4930
[10]	Merkle L D, Kitriotis D 1988 Phys. Rev. B 38 1473
[11]	Hamza A V, Siekhaus W, Rubenchik A M 2002 Proc. SPIE 4679 96
[12]	Génin F Y, Salleo A, Pistor T V 2001 J. Opt. Soc. Am. A 18 2607
[13]	Rubenchik A M, Feit M D 2002 Proc. SPIE 4679 79
[14]	Han P G, Ma Z Y, Xia Z Y, Chen D Y, Xu J, Qian B, Chen S, Li W, Huang X F, Chen K J, Feng D 2007 Chin. Phys. 16 1410
[15]	Hua J R, Zu X T, Li L 2010 Acta Phys. Sin. 59 2519 (in Chinese) [花金荣、祖小涛、李莉 2010 物理学报 59 2519]
[16]	Chen X Q, Zu X T, Zheng W G, Jiang X D, Liu C M 2006 Acta Phys. Sin. 55 1201 (in Chinese) [陈习权、祖小涛、郑万国、蒋晓东、刘春明 2006 物理学报 55 1201]
[17]	Xiang X, Chen M, Chen M Y, Zu X T, Zhu S, Wang L M 2010 Chin. Phys. B 19 018107
[18]	Li L, Lei Y, Xiao S Q 2009 High Power Laser and Particle Beams 21 936 (in Chinese)[李莉、雷雨、肖邵球 2009 强激光与粒子束 20 936] 〖19] Ge D B, Yan Y B 2002 Electro Magnetic Wave and FDTD (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]
[19]	Xue S W, Zu X T, Shao L X, Yuan Z L, Xiang X, Deng H 2008 Chin. Phys. 17 2240
[20]	Zhou Z X, Wang H L, Shen Y Q, Liu D J, Liu H, He S Y, Yang D Z 2008 Acta Phys. Sin. 57 592 (in Chinese) [周忠祥、王宏利、申艳青、刘大军、刘海、何世禹、杨德庄 2008 物理学报 57 592]

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