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Title: Glancing-angle-deposited magnesium oxide films for high-fluence applications

Here, Birefringent magnesium oxide thin films are formed by glancing angle deposition to perform as quarter-wave plates at a wavelength of 351 nm. These films are being developed to fabricate a large aperture distributed-polarization rotator for use in vacuum, with an ultimate laser-damage–threshold goal of up to 12 J/cm2 for a 5-ns flat-in-time pulse. The laser-damage threshold, ease of deposition, and optical film properties are evaluated. While the measured large-area laser-damage threshold is limited to ~4 J/cm2 in vacuum, initial results based on small-spot testing in air (>20 J/cm2) suggest MgO may be suitable with further process development.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [2] ;  [2] ;  [2] ;  [2]
  1. Univ. of Rochester, Rochester, NY (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Grant/Contract Number:
NA0001944; DE NA0001944
Type:
Published Article
Journal Name:
Optical Materials Express
Additional Journal Information:
Journal Volume: 6; Journal Issue: 7; Journal ID: ISSN 2159-3930
Publisher:
Optical Society of America (OSA)
Research Org:
Univ. of Rochester, Rochester, NY (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; deposition and fabrication; polarization; other optical properties; subwavelength structures; nanostructures
OSTI Identifier:
1257292
Alternate Identifier(s):
OSTI ID: 1264254