| Autor: |
Liu C, Wang Y, Chen Y, Lu Y, Wang Z, Feng Y, Chen T, Yu Y, Pan J, Huang Z, Pang M, Leng Y, Shao J |
| Jazyk: |
angličtina |
| Zdroj: |
Optics express [Opt Express] 2024 Nov 04; Vol. 32 (23), pp. 40165-40174. |
| DOI: |
10.1364/OE.532817 |
| Abstrakt: |
We report a broadband metal-dielectric dispersive mirror (MDDM) based on Al/SiO 2 /HfO 2 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 2 /SiO 2 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. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
|
