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Properties of femtosecond laser modified atomic layer deposition SiO2 films and their resistance to nanosecond ultraviolet lasers

  • Chengdu Fine Optical Engineering Research Center

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

The point defects exist in the SiO2 thin films can cause high absorption, which is known to be responsible for laser induced damage of the films under high power nanosecond (ns) laser irradiation. Laser conditioning of the film is beneficial to eliminate the film defects and improve the ability of films to resist ultraviolet (UV) ns laser damage. In this article, femtosecond laser is proposed to modify the SiO2 films in the hope of improving the damage resistance of films to UV lasers. After femtosecond laser conditioning, the film properties of ALD SiO2 films were characterized in terms of surface morphology, UV laser damage induced threshold (LIDT) and optical properties. The results show that significant improvement in laser damage resistance is achieved after femtosecond laser conditioning, the LIDT of the 300 nm SiO2 thin film increased from 1.55 J/cm2 to 16.69 J/cm2, and the LIDT of the 600 nm SiO2 thin film increased from 2.01 J/cm2 to 9.46

Original languageEnglish
Title of host publicationAdvanced Laser Processing and Manufacturing VI
EditorsRongshi Xiao, Minghui Hong, Jianhua Yao, Yuji Sano
PublisherSPIE
ISBN (Electronic)9781510656901
DOIs
StatePublished - 2022
Externally publishedYes
EventAdvanced Laser Processing and Manufacturing VI 2022 - Virtual, Online, China
Duration: 5 Dec 202211 Dec 2022

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume12312
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceAdvanced Laser Processing and Manufacturing VI 2022
Country/TerritoryChina
CityVirtual, Online
Period5/12/2211/12/22

Keywords

  • SiO film
  • atomic layer deposition
  • femtosecond laser conditioning
  • laser induced damage threshold

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