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JOURNAL OF SYNTHETIC CRYSTALS ›› 2024, Vol. 53 ›› Issue (10): 1738-1744.

• Research Articles • Previous Articles     Next Articles

Laser-Induced Damage Characteristics of VO2-SiO2 Composite Films

HAN Sun, LI Yan   

  1. School of Materials and Physics, China University of Mining and Technology, Xuzhou 221116, China
  • Received:2024-04-30 Online:2024-10-15 Published:2024-10-21

Abstract: The VO2 and VO2-SiO2 composite films were prepared by sol-gel method. The phase structure and transmittance of films were characterized by X-ray diffraction (XRD) and ultraviolet visible spectrophotometer. The results reveal that the prepared VO2 film is monoclinic phase (B), and the XRD patterns of VO2-SiO2 composite film is similar to that of VO2 film. The optical transmittance of films have reached over 90% within the range of 450 nm to 800 nm. The laser induced damage threshold (LIDT) of VO2-SiO2 composite film is 3.9 J/cm2, which is 77.3% higher than that of VO2 film. The difference in damage morphology between VO2 film and VO2-SiO2 film were studied by FESEM and step analyzer. The VO2 film exhibits melt type damage, while the VO2-SiO2 film exhibits melt type damage and stress damage. In addition, laser-induced damage models for different films were constructed and damage characteristics and underlying mechanisms were discussed.

Key words: VO2, SiO2, sol-gel method, optical transmittance, LIDT, damage characteristic

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