Phase-Type Fresnel Zone Plate with Multi-Wavelength Imaging Embedded in Fluoroaluminate Glass Fabricated via Ultraviolet Femtosecond Laser Lithography
Herein, we report a novel optical glass material, fluoroaluminate (AlF<sub>3</sub>) glass, with excellent optical transmittance from ultraviolet to infrared wavelength ranges, which provides more options for application in optical devices. Based on its performance, the phase-type Fresnel...
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| Autores principales: | , , , , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
MDPI AG
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/6ff3160e6fb744ec80bd8fef6cf72a62 |
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| Sumario: | Herein, we report a novel optical glass material, fluoroaluminate (AlF<sub>3</sub>) glass, with excellent optical transmittance from ultraviolet to infrared wavelength ranges, which provides more options for application in optical devices. Based on its performance, the phase-type Fresnel zone plate (FZP) by ultraviolet femtosecond (fs) laser-inscribed lithography is achieved, which induces the refractive index change by fs-laser tailoring. The realization of ultraviolet fs-laser fabrication inside glass can benefit from the excellent optical performance of the AlF<sub>3</sub> glass. Compared with traditional surface-etching micro-optical elements, the phase-type FZP based on AlF<sub>3</sub> glass exhibits a clear and well-defined geometry and presents perfect environmental suitability without surface roughness problems. Additionally, optical focusing and multi-wavelength imaging can be easily obtained. Phase-type FZP embedded in AlF<sub>3</sub> glass has great potential applications in the imaging and focusing in glass-integrated photonics, especially for the ultraviolet wavelength range. |
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