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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 9 — Mar. 20, 2011
  • pp: C357–C363

Laser damage study of nodules in electron-beam-evaporated HfO 2 / SiO 2 high reflectors

Xinbin Cheng, Zhengxiang Shen, Hongfei Jiao, Jinlong Zhang, Bin Ma, Tao Ding, Jiangtao Lu, Xiaodong Wang, and Zhanshan Wang  »View Author Affiliations


Applied Optics, Vol. 50, Issue 9, pp. C357-C363 (2011)
http://dx.doi.org/10.1364/AO.50.00C357


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Abstract

A reactive electron beam evaporation process was used to fabricate 1.064 μm HfO 2 / SiO 2 high reflectors. The deposition process was optimized to reduce the nodular density. Cross-sectioning of nodular defects by a focused ion-beam milling instrument showed that the nodule seeds were the residual particles on the substrate and the particulates from the silica source “splitting.” After optimizing the substrate preparation procedure and the evaporation process, a low nodular density of 2.7 / mm 2 was achieved. The laser damage test revealed that the ejection fluences and damage growth behaviors of nodules created from deep or shallow seeds were totally different. A mechanism based on directional plasma scald was proposed to interpret observed damage growth phenomenon.

© 2011 Optical Society of America

OCIS Codes
(140.3330) Lasers and laser optics : Laser damage
(310.0310) Thin films : Thin films

History
Original Manuscript: August 2, 2010
Revised Manuscript: December 14, 2010
Manuscript Accepted: December 17, 2010
Published: February 2, 2011

Citation
Xinbin Cheng, Zhengxiang Shen, Hongfei Jiao, Jinlong Zhang, Bin Ma, Tao Ding, Jiangtao Lu, Xiaodong Wang, and Zhanshan Wang, "Laser damage study of nodules in electron-beam-evaporated HfO2/SiO2 high reflectors," Appl. Opt. 50, C357-C363 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-9-C357


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