Nanolaminate-based design for UV laser mirror coatings

Meiping Zhu; Nuo Xu; Behshad Roshanzadeh; S.T.P. Boyd; Wolfgang Rudolph; Yingjie Chai; Jianda Shao

doi:10.1038/s41377-020-0257-4

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Nanolaminate-based design for UV laser mirror coatings

Letter

- Nanolaminate-based design for UV laser mirror coatings
- Light: Science & Applications Vol. 9, Issue 1, Pages: 12-17(2020)
- Affiliations：
  
  1.Laboratory of Thin Film Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
  2.Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China Full list of author information is available at the end of the article
  3.Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China
  4.Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
  5.Department of Physics and Astronomy, University of New Mexico, Albuquerque, NM 87131, USA
  6.CREOL, The College of Optics and Photonics, University of Central Florida, Orlando, FL 32816, USA
- Author bio：
  
  Meiping Zhu (bree@siom.ac.cn)
  Wolfgang Rudolph (wrudolph@unm.edu)
  Jianda Shao (jdshao@siom.ac.cn)
- Funds：
- DOI：10.1038/s41377-020-0257-4
  CLC：
- Published：2020，
  
  Published Online：11 February 2020，
  
  Received：01 November 2019，
  
  Revised：13 January 2020，
  
  Accepted：01 February 2020
- Accepted：
Scan QR Code
Zhu, M. P. et al. Nanolaminate-based design for UV laser mirror coatings. Light: Science & Applications, 9, 12–17 (2020).
DOI：

Zhu, M. P. et al. Nanolaminate-based design for UV laser mirror coatings. Light: Science & Applications, 9, 12–17 (2020). DOI： 10.1038/s41377-020-0257-4.

摘要

Abstract

With ever-increasing laser power

the requirements for ultraviolet (UV) coatings increase continuously. The fundamental challenge for UV laser-resistant mirror coatings is to simultaneously exhibit a high reflectivity with a large bandwidth and high laser resistance. These characteristics are traditionally achieved by the deposition of laser-resistant layers on highly reflective layers. We propose a preflectivity and laser resistance in oneq design by using tunable nanolaminate layers that serve as an effective layer with a high refractive index and a large optical bandgap. An Al

-HfO

nanolaminate-based mirror coating for UV laser applications is experimentally demonstrated using e-beam deposition. The bandwidth

over which the reflectance is

99.5%

is more than twice that of a traditional mirror with a comparable overall thickness. The laser-induced damage threshold is increased by a factor of ~1.3 for 7.6 ns pulses at a wavelength of 355 nm. This tunable

nanolaminate-based new design strategy paves the way toward a new generation of UV coatings for high-power laser applications.

关键词

Keywords

references

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