Volume Fresnel zone plates fabricated by femtosecond laser direct writing

2007 ◽  
Vol 90 (1) ◽  
pp. 011104 ◽  
Author(s):  
Pornsak Srisungsitthisunti ◽  
Okan K. Ersoy ◽  
Xianfan Xu
Keyword(s):  
Femtosecond Laser ◽  
Fresnel Zone ◽  
Direct Writing ◽  
Laser Direct Writing ◽  
Fresnel Zone Plates ◽  
Zone Plates

Laser direct writing of volume modified Fresnel zone plates

2007 ◽  
Vol 24 (9) ◽  
pp. 2090 ◽  
Author(s):  
Pornsak Srisungsitthisunti ◽  
Okan K. Ersoy ◽  
Xianfan Xu
Keyword(s):  
Fresnel Zone ◽  
Direct Writing ◽  
Laser Direct Writing ◽  
Fresnel Zone Plates ◽  
Zone Plates

Fabrication of TiO2 Thin Film-Based Fresnel Zone Plates by Nanosecond Laser Direct Writing

2017 ◽  
Vol 6 (1) ◽  
Author(s):  
Tahseen Jwad ◽  
Sunan Deng ◽  
Haider Butt ◽  
Stefan Dimov
Keyword(s):  
Film Thickness ◽  
Phase Shifter ◽  
Fresnel Zone ◽  
Scanning Speed ◽  
Phase Shifting ◽  
Nanosecond Laser ◽  
Direct Writing ◽  
Tio2 Thin Films ◽  
Fresnel Zone Plates ◽  
Zone Plates

Fresnel zone plates (FZPs) have been gaining a significant attention by industry due to their compact design and light weight. Different fabrication methods have been reported and used for their manufacture but they are relatively expensive. This research proposes a new low-cost one-step fabrication method that utilizes nanosecond laser selective oxidation of titanium coatings on glass substrates and thus to form titanium dioxide (TiO2) nanoscale films with different thicknesses by controlling the laser fluence and the scanning speed. In this way, phase-shifting FZPs were manufactured, where the TiO2 thin-films acted as a phase shifter for the reflected light, while the gain in phase depended on the film thickness. A model was created to analyze the performance of such FZPs based on the scalar theory. Finally, phase-shifting FZPs were fabricated for different operating wavelengths by varying the film thickness and a measurement setup was built to compare experimental and theoretical results. A good agreement between these results was achieved, and an FZP efficiency of 5.5% to 20.9% was obtained when varying the wavelength and the oxide thicknesses of the zones.

Optimization of the focusing characteristics of Fresnel zone plates fabricated with a femtosecond laser

2021 ◽  
Vol 68 (2) ◽  
pp. 100-107
Author(s):  
Fang Zhou ◽  
Xiaoyan Sun ◽  
Hongmin Zhong ◽  
Lian Duan ◽  
Youwang Hu ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Fresnel Zone ◽  
Fresnel Zone Plates ◽  
Zone Plates

Sapphire-Based Fresnel Zone Plate Fabricated by Femtosecond Laser Direct Writing and Wet Etching

2016 ◽  
Vol 28 (12) ◽  
pp. 1290-1293 ◽  
Author(s):  
Qian-Kun Li ◽  
Yan-Hao Yu ◽  
Lei Wang ◽  
Xiao-Wen Cao ◽  
Xue-Qing Liu ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Fresnel Zone ◽  
Wet Etching ◽  
Zone Plate ◽  
Fresnel Zone Plate ◽  
Direct Writing ◽  
Laser Direct Writing
Sign in / Sign up

Export Citation Format

Share Document