Light Field Intensification in Optical Films Induced by Intercoupling of Defects and Organic Contamination

Micromachines

卷:13

Xiao-Feng Liu¹  Ji Liu²  Xin Chen²  Xiu-Lan Ling² 

[1] Key Laboratory of Material Science and Technology for High Power Lasers, Shanghai Institute of Optics and Fine Mechanics, Shanghai 201800, China;

[2] School of Information and Communication Engineering, North University of China, Taiyuan 030051, China;

关键词: optical thin film;    defect;    organic contamination;    laser-induced damage;   

DOI  :  10.3390/mi13030387

来源: DOAJ

【 摘 要 】

Based on the finite-difference time-domain method, light field intensification in optical films due to the intercoupling of defects and organic contamination was analyzed. The results show that the intercoupling between the defect and the organic contamination droplet leads to an increase in the local electric field and the coupling effect enhances with the decreasing distance between the defect and the organic contamination droplet and the increasing diameter of the organic contamination droplet. The coupling effect of the defect and the organic contamination layer depends on not only the thickness of the organic contamination layer but also the refractive index of the organic contamination layer. With the thickness and the refractive index of the organic contamination layer increasing, the peak value of the electric field decreases. This work deepens the physical understanding of the degradation mechanism of laser-induced damage in optical thin films used in vacuum.

【 授权许可】

Unknown