Amorphous dielectric optical coatings deposited by plasma ion-assisted electron beam evaporation for gravitational wave detectors
Carlos Garcia Nuñez, Gavin Wallace, Lewis Fleming, Kieran Craig, Shigeng Song, Sam Ahmadzadeh, Caspar Clark, Simon Tait, Iain Martin, Stuart Reid, Sheila Rowan, and Des Gibson
Carlos Garcia Nuñez,1,*
Gavin Wallace,2
Lewis Fleming,1
Kieran Craig,2
Shigeng Song,1,3
Sam Ahmadzadeh,1
Caspar Clark,1,4
Simon Tait,5
Iain Martin,5
Stuart Reid,2
Sheila Rowan,5
and Des Gibson3
1Institute of Thin Films, Sensors and Imaging, University of the West of Scotland, SUPA, Paisley PA1 2BE, Scotland, UK
2University of Strathclyde, SUPA Glasgow G1 1XQ, Scotland, UK
3Helia Photonics Ltd., Rosebank Park, Livingston West Lothian EH54 7EJ, Scotland, UK
4University of Glasgow, SUPA Glasgow G12 8QQ, Scotland, UK
Carlos Garcia Nuñez, Gavin Wallace, Lewis Fleming, Kieran Craig, Shigeng Song, Sam Ahmadzadeh, Caspar Clark, Simon Tait, Iain Martin, Stuart Reid, Sheila Rowan, and Des Gibson, "Amorphous dielectric optical coatings deposited by plasma ion-assisted electron beam evaporation for gravitational wave detectors," Appl. Opt. 62, B209-B221 (2023)
Coating thermal noise (CTN) in amorphous coatings is a drawback hindering their application in precision experiments such as gravitational wave detectors (GWDs). Mirrors for GWDs are Bragg’s reflectors consisting of a bilayer-based stack of high- and low-refractive-index materials showing high reflectivity and low CTN. In this paper, we report the characterization of morphological, structural, optical, and mechanical properties of high-index materials such as scandium sesquioxide and hafnium dioxide and a low-index material such as magnesium fluoride deposited by plasma ion-assisted electron beam evaporation. We also evaluate their properties under different annealing treatments and discuss their potential for GWDs.
Shigeng Song, Sijia Cai, Daxing Han, Carlos García Nuñez, Gong Zhang, Gavin Wallace, Lewis Fleming, Kieran Craig, Stuart Reid, Iain W. Martin, Sheila Rowan, and Des Gibson Appl. Opt. 62(7) B73-B78 (2023)
M. Granata, A. Amato, G. Cagnoli, M. Coulon, J. Degallaix, D. Forest, L. Mereni, C. Michel, L. Pinard, B. Sassolas, and J. Teillon Appl. Opt. 59(5) A229-A235 (2020)
Olaf Stenzel, Steffen Wilbrandt, Shan Du, Christian Franke, Norbert Kaiser, Andreas Tünnermann, Mathias Mende, Henrik Ehlers, and Mario Held Opt. Mater. Express 4(8) 1696-1707 (2014)
Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.
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