Imperial College London
Portrait Picture

Dr Ali K. Yetisen

Faculty of Engineering, Department of Chemical Engineering

Senior Lecturer
 
 
 
//

Contact

 

+44 (0)20 7594 5562a.yetisen Website

 
 
//

Location

 

507ACE ExtensionSouth Kensington Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Alqurashi:2017:10.1039/c7ra00109f,
author = {Alqurashi, T and Penchev, P and Yetisen, AK and Sabouri, A and Ameen, RM and Dimov, S and Butt, H},
doi = {10.1039/c7ra00109f},
journal = {RSC ADVANCES},
pages = {18019--18023},
title = {Femtosecond laser directed fabrication of optical diffusers},
url = {http://dx.doi.org/10.1039/c7ra00109f},
volume = {7},
year = {2017}
}
Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Optical diffusers are widely used in filament lamps, imaging systems, display technologies, lasers, and Light Emitting Diodes (LEDs). Here, a method for the fabrication of optical diffusers through femtosecond laser machining is demonstrated. Float glass surfaces were ablated with femtosecond laser light to form nanoscale ripples with dimensions comparable to the wavelength of visible light. These structures produce highly efficient and wide field of view diffusers. The machined patterns altered the average surface roughness, with the majority of particles in the range of a few hundred nanometers. The optical diffusion characteristic and a maximum diffusion angle of near 172° was achieved with optimum machining parameters. The transmission performance of the diffusers was measured to be ∼30% across the visible spectrum. The demonstrated technique has potential for producing low-cost large area optical devices. The process benefits from the flexibility of the laser writing method and enables the production of custom optical diffusers.
AU  - Alqurashi,T
AU  - Penchev,P
AU  - Yetisen,AK
AU  - Sabouri,A
AU  - Ameen,RM
AU  - Dimov,S
AU  - Butt,H
DO  - 10.1039/c7ra00109f
EP  - 18023
PY  - 2017///
SN  - 2046-2069
SP  - 18019
TI  - Femtosecond laser directed fabrication of optical diffusers
T2  - RSC ADVANCES
UR  - http://dx.doi.org/10.1039/c7ra00109f
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000399005200056&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://pubs.rsc.org/en/content/articlelanding/2017/RA/C7RA00109F
UR  - http://hdl.handle.net/10044/1/96873
VL  - 7
ER  -
Download