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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 24 — Aug. 20, 2011
  • pp: 4720–4727

Laser damage properties of TiO 2 / Al 2 O 3 thin films grown by atomic layer deposition

Yaowei Wei, Hao Liu, Ouyang Sheng, Zhichao Liu, Songlin Chen, and Liming Yang  »View Author Affiliations


Applied Optics, Vol. 50, Issue 24, pp. 4720-4727 (2011)
http://dx.doi.org/10.1364/AO.50.004720


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Abstract

Research on thin film deposited by atomic layer deposition (ALD) for laser damage resistance is rare. In this paper, it has been used to deposit TiO 2 / Al 2 O 3 films at 110 ° C and 280 ° C on fused silica and BK7 substrates. Microstructure of the thin films was investigated by x-ray diffraction. The laser-induced damage threshold (LIDT) of samples was measured by a damage test system. Damage morphology was studied under a Nomarski differential interference contrast microscope and further checked under an atomic force microscope. Multilayers deposited at different temperatures were compared. The results show that the films deposited by ALD had better uniformity and transmission; in this paper, the uniformity is better than 99% over 100 mm Φ samples, and the transmission is more than 99.8% at 1064 nm . Deposition temperature affects the deposition rate and the thin film microstructure and further influences the LIDT of the thin films. As to the TiO 2 / Al 2 O 3 films, the LIDTs were 6.73 ± 0.47 J / cm 2 and 6.5 ± 0.46 J / cm 2 at 110 ° C on fused silica and BK7 substrates, respectively. The LIDTs at 110 ° C are notably better than 280 ° C .

© 2011 Optical Society of America

OCIS Codes
(140.3330) Lasers and laser optics : Laser damage
(310.1210) Thin films : Antireflection coatings
(310.1860) Thin films : Deposition and fabrication

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: February 22, 2011
Revised Manuscript: March 28, 2011
Manuscript Accepted: March 28, 2011
Published: August 10, 2011

Citation
Yaowei Wei, Hao Liu, Ouyang Sheng, Zhichao Liu, Songlin Chen, and Liming Yang, "Laser damage properties of TiO2/Al2O3 thin films grown by atomic layer deposition," Appl. Opt. 50, 4720-4727 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-24-4720

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