Hexagonal boron nitride nanosheets incorporated antireflective silica coating with enhanced laser-induced damage threshold  

作　　者：Jing Wang Chunhong Li Wenjie Hu Wei Han Qihua Zhu Yao Xu 

机构地区：[1]Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001,China [2]Research Center of Laser Fusion,China Academy of Engineering Physics,Mianyang 621900,China [3]State Key Laboratory of Transient Optics and Photonics,Xi'an Institute of Optics and Precision Mechanics,Chinese Academy ofSciences,Xi'an 710119,China [4]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《High Power Laser Science and Engineering》2018年第2期92-97,共6页高功率激光科学与工程（英文版）

基　　金：supported by National Natural Science Foundation of China(Nos.U1530148 and 61605188)

摘　　要：Boron nitride(BN) nanosheets incorporated silica antireflective(AR) coating was successfully prepared on fused silica substrate to improve the antilaser-damage ability of transmissive optics used in high-power laser systems. The BN nanosheets were obtained by urea assisted solid exfoliation, and then incorporated into basic-catalyzed silica sols without any further treatment. The transmission electron microscope(TEM) images indicated that the BN nanosheets generally consisted of 2–10 layers. The antireflective BN/SiO_2 coating exhibited excellent transmittance as high as 99.89% at351 nm wavelength on fused silica substrate. The thermal conductivity 0.135 W · m^(-1)· K^(-1) of the BN/SiO_2 coating with 10% BN addition was about 23% higher than 0.11 W · m^(-1)· K^(-1) of the pure SiO_2 AR coating. The laser-induced damage threshold(LIDT) of that BN/SiO_2 coating is also 23.1% higher than that of pure SiO_2 AR coating. This research provides a potential application of BN/SiO_2 coatings in high-power laser systems.Boron nitride （BN） nanosheets incorporated silica antireflective （AR） coating was successfully prepared on fused silica substrate to improve the antilaser-damage ability of transmissive optics used in high-power laser systems. The BN nanosheets were obtained by urea assisted solid exfoliation, and then incorporated into basic-catalyzed silica sols without any further treatment. The transmission electron microscope （TEM） images indicated that the BN nanosheets generally consisted of 2-10 layers. The antireflective BN/SiO2 coating exhibited excellent transmittance as high as 99.89% at 351 nm wavelength on fused silica substrate. The thermal conductivity 0.135 W · m-1 · K-1 of the BN/SiO2 coating with 10% BN addition was about 23% higher than 0.11 W· m-1 · K-1 of the pure SiO2 AR coating. The laser-induced damage threshold （LIDT） of that BN/SiO2 coating is also 23.1% higher than that of pure SiO2 AR coating. This research provides a potential application of BN/SiO2 coatings in high-power laser systems.

关 键 词：hexagonal boron nitride laser-induced damage silica antireflective coating thermal conductivity 

分 类 号：D4[政治法律—政治学]