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Fabrication of 1-D Photonic Crystal Cavity on a Nanofiber Using Femtosecond Laser-induced Ablation
Published on: February 25, 2017
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Femtosecond laser directed fabrication of optical diffusers
Tawfiq Alqurashi1,2, Pavel Penchev1, Ali K Yetisen3
1Nanotechnology Laboratory, School of Engineering, University of Birmingham, Birmingham, B15 2TT, UK. Email: h.butt@bham.ac.uk; Tel: +44(0) 1214158623.
RSC Advances
|September 4, 2018
Summary
Femtosecond laser machining creates efficient optical diffusers on glass by forming nanoscale ripples. This flexible method produces wide field-of-view diffusers for various applications like LEDs and displays.
Area of Science:
- Materials Science
- Optics
- Nanotechnology
Background:
- Optical diffusers are crucial components in diverse technologies, including lighting, imaging, displays, lasers, and Light Emitting Diodes (LEDs).
- Existing fabrication methods may have limitations in cost, scalability, or customization for specific optical diffuser requirements.
Purpose of the Study:
- To demonstrate a novel method for fabricating high-performance optical diffusers using femtosecond laser machining.
- To characterize the optical properties and fabrication parameters of laser-machined diffusers.
Main Methods:
- Femtosecond laser ablation was employed to machine float glass surfaces, creating nanoscale surface ripples.
- Surface topography and optical diffusion characteristics, including diffusion angle and transmission, were analyzed.
Main Results:
- Nanoscale ripples comparable to visible light wavelengths were formed, resulting in highly efficient diffusers.
- A maximum diffusion angle approaching 172° was achieved with optimized machining parameters.
- The diffusers exhibited approximately 30% transmission across the visible spectrum.
Conclusions:
- Femtosecond laser machining offers a flexible and effective technique for producing custom optical diffusers with wide fields of view.
- This method holds potential for the low-cost, large-area fabrication of optical devices for various technological applications.
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