The effect of an electric field on the thermomechanical damage of nodular defects in dielectric multilayer coatings irradiated by nanosecond laser pulses

Xinbin Cheng; Jinlong Zhang; Tao Ding; Zeyong Wei; Hongqiang Li; Zhanshan Wang

doi:10.1038/lsa.2013.36

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The effect of an electric field on the thermomechanical damage of nodular defects in dielectric multilayer coatings irradiated by nanosecond laser pulses

Original Articles

- The effect of an electric field on the thermomechanical damage of nodular defects in dielectric multilayer coatings irradiated by nanosecond laser pulses
- The effect of an electric field on the thermomechanical damage of nodular defects in dielectric multilayer coatings irradiated by nanosecond laser pulses
- LSA 2013年2卷第1-2期
- Affiliations：
  
  1.Key Laboratory of Advanced Micro-Structure Materials, Ministry of Education, Shanghai 200092, China
  2.Institute of Precision Optical Engineering, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China
- Author bio：
  
  Professor ZS Wang, Institute of Precision Optical Engineering, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China Email: wangzs@tongji.edu.cn
- Funds：
- DOI：10.1038/lsa.2013.36
  中图分类号：
- 纸质出版日期：2013-06，
  
  网络出版日期：2013-06-21，
  
  收稿日期：2013-01-28，
  
  修回日期：2013-03-01，
  
  录用日期：2013-03-05
- Accepted：
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The effect of an electric field on the thermomechanical damage of nodular defects in dielectric multilayer coatings irradiated by nanosecond laser pulses[J]. LSA, 2013,2(1-2).

Cheng, X. B. et al. The effect of an electric field on the thermomechanical damage of nodular defects in dielectric multilayer coatings irradiated by nanosecond laser pulses. Light: Science & Applications, 2, e80 (2013).
The effect of an electric field on the thermomechanical damage of nodular defects in dielectric multilayer coatings irradiated by nanosecond laser pulses[J]. LSA, 2013,2(1-2). DOI： 10.1038/lsa.2013.36.

Cheng, X. B. et al. The effect of an electric field on the thermomechanical damage of nodular defects in dielectric multilayer coatings irradiated by nanosecond laser pulses. Light: Science & Applications, 2, e80 (2013). DOI： 10.1038/lsa.2013.36.

摘要

Abstract

Thermomechanical damage of nodules in dielectric multilayer coatings that are irradiated by nanosecond laser pulses has been interpreted with respect to mechanical properties and electric-field enhancement. However

the effect of electric-field enhancement in nodular damage

especially the influence of electric-field distributions

has never been directly demonstrated through experimental results

which prevents the achievement of a clear understanding of the damage process of nodular defects. Here

a systematic and comparative study was designed to reveal how electric-field distributions affect the damage behavior of nodules. To obtain reliable results

two series of artificial nodules with different geometries and film absorption characteristics were prepared from monodisperse silica microspheres. After establishing simplified geometrical models of the nodules

the electric-field enhancement was simulated using a three-dimensional finite-difference time-domain code. Then

the damage morphologies of the artificial nodules were directly compared with the simulated electric-field intensity profiles. For both series of nodules

the damage morphologies reproduced our simulated electric-field intensity distributions very well. These results indicated that the electric-field distribution was actually a bridge that connected the nodular mechanical properties to the final thermomechanical damage. Understanding of the damage mechanism of nodules was deepened by obtaining data on the influence of electric-field distributions on the damage behavior of nodules.

关键词

Keywords

electric fieldnanosecond-pulse-laser damagenodular defectsthin films

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Calculated Using Optilayer Thin Film software, Ver. 8.18.http://www.optilayer.com/http://www.optilayer.com/

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