Metal-dielectric dispersive mirrors for ultraviolet lasers

We report a broadband metal-dielectric dispersive mirror (MDDM) based on Al/SiO<sub>2</sub>/HfO<sub>2</sub> thin films operating in the near-ultraviolet (UV) region. Demonstrating the combined benefits of both the wide reflective bandwidth of aluminum in the UV region and the flexible dispersion control capability of HfO<sub>2</sub>/SiO<sub>2</sub> multilayer films, the MDDM has a wide bandwidth, low total thickness, and precise dispersion compensation ability. We propose an initial design based on a shortwave reflection enhancement structure (SWRES) to prevent shortwave light from obtaining a second time-dispersion compensation in the deep metal layer. The SWRES can effectively suppress group delay dispersion (GDD) oscillations in MDDMs. The designed MDDM with low GDD oscillation, low total thickness, and a wide working band was successfully fabricated and characterized. The MDDM was used to generate 15 fs UV pulses. This study demonstrates that metal-dielectric structures can enhance the performance of UV dispersive mirrors and lays the foundation for a new generation of UV femtosecond laser equipment.

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Publication Details

Journal
Optics Express
Published
2024-10-11
DOI
https://doi.org/10.1364/oe.532817
Primary Topic
Laser Design and Applications
Type
article
Field-Weighted Citation Impact
0.00

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article

Metal-dielectric dispersive mirrors for ultraviolet lasers

Yue Yu, Yesheng lu, Tiandao Chen, Jinyu Pan et al.
Optics Express
Laser Design and Applications
article

Metal-dielectric dispersive mirrors for ultraviolet lasers

Yue Yu, Yesheng lu, Tiandao Chen, Jinyu Pan, Yuxin Leng, Meng Pang, Yukang Feng, Chang Liu, Zhihao Wang, Yu Chen, Jianda Shao, Yanzhi Wang, Zhi Yuan Huang
article en

Abstract

We report a broadband metal-dielectric dispersive mirror (MDDM) based on Al/SiO<sub>2</sub>/HfO<sub>2</sub> thin films operating in the near-ultraviolet (UV) region. Demonstrating the combined benefits of both the wide reflective bandwidth of aluminum in the UV region and the flexible dispersion control capability of HfO<sub>2</sub>/SiO<sub>2</sub> multilayer films, the MDDM has a wide bandwidth, low total thickness, and precise dispersion compensation ability. We propose an initial design based on a shortwave reflection enhancement structure (SWRES) to prevent shortwave light from obtaining a second time-dispersion compensation in the deep metal layer. The SWRES can effectively suppress group delay dispersion (GDD) oscillations in MDDMs. The designed MDDM with low GDD oscillation, low total thickness, and a wide working band was successfully fabricated and characterized. The MDDM was used to generate 15 fs UV pulses. This study demonstrates that metal-dielectric structures can enhance the performance of UV dispersive mirrors and lays the foundation for a new generation of UV femtosecond laser equipment.

Optics ExpressVol. 32(23)
Chinese Academy of Sciences (CN), Shanghai Institute of Optics and Fine Mechanics (CN), University of Chinese Academy of Sciences (CN), Center for Excellence in Education (US)
China Postdoctoral Science Foundation, Youth Innovation Promotion Association of the Chinese Academy of Sciences, National Key Research and Development Program of China
Openalex Percentile: Top 85%
Laser Design and Applications
DOIOpen Access PDFOpenAlex
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