0

Full Content is available to subscribers

Subscribe/Learn More  >
Proceedings Article

Modeling of electric-field enhancement at nodular defects in dielectric mirror coatings

[+] Author Affiliations
J. F. DeFord, Mark R. Kozlowski

Lawrence Livermore National Lab. (USA)

Proc. SPIE 1848, 24th Annual Boulder Damage Symposium Proceedings -- Laser-Induced Damage in Optical Materials: 1992, 455 (June 24, 1993); doi:10.1117/12.147414
Text Size: A A A
From Conference Volume 1848

  • 24th Annual Boulder Damage Symposium Proceedings -- Laser-Induced Damage in Optical Materials: 1992
  • Harold E. Bennett; Lloyd L. Chase; Arthur H. Guenther; Brian E. Newnam; M. J. Soileau
  • Boulder, CO | September 28, 1992

abstract

In dielectric multilayer optical coatings, laser induced damage is often associated with micrometers -scale surface defects such as the well known nodule defect. The interaction mechanism of the laser light with the coating defects is not understood, however. Historically, laser damage has been associated with peaks in the standing-wave electric-field distribution within the multilayer films. In the present work we use a finite-difference time-domain electromagnetic modeling code to study the influence of 3-D nodule defects on the E-field distribution. The coating studied is a dielectric multilayer HR consisting of alternating quarter- wave layers of HfO2 and SiO2 at 1.06 micrometers . The nodule is modeled as a parabolic defect initiated at a spherical seed. The modeling results show that E-field enhancements as large as a factor of 4 can be present at the defects. The enhancement shows a complex dependence on the size, depth, and dielectric constant of the seed material. In general, defects initiated by large, shallow seeds produce the largest E-fields. Voids at the nodule boundary influence the E-field distribution, but have a small effect on the peak field.

© (1993) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

J. F. DeFord and Mark R. Kozlowski
"Modeling of electric-field enhancement at nodular defects in dielectric mirror coatings", Proc. SPIE 1848, 24th Annual Boulder Damage Symposium Proceedings -- Laser-Induced Damage in Optical Materials: 1992, 455 (June 24, 1993); doi:10.1117/12.147414; http://dx.doi.org/10.1117/12.147414


Access This Article
Sign In to Access Full Content
Please Wait... Processing your request... Please Wait.
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
 

Figures

Tables

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

Advertisement


Buy this article ($18 for members, $25 for non-members).
Sign In