Università Cattolica del Sacro Cuore

Crystalline oxides for mirror coatings

 9 giugno 2022 Immagine.png

Aula 21, ore 14.00.       
via Garzetta 48, Brescia


Jean-Pierre LOCQUET

Dept. of Physics and Astronomy, KU Leuven, Leuven, Belgium



Reflective coatings on mirror bodies are key elements of gravitational wave detectors and are a topic of 
intense research in the community. Two classes of coatings are currently studied namely a broad range of 
amorphous compounds and a few crystalline materials. The latter group consists  of AlGaAs / GaAs and 
AlGaP / GaP. 
In this presentation, the potential of crystalline oxides coatings is explored. Considering the many crystalline 
oxide substrates that are commercially available in high quality grade, it is a clear that several of these can 
be used to build up optically reflective heterostructures.  
A first selection is proposed based on a number of criteria that will be reviewed. These include: i) substrate 
considerations, ii) structural parameters, iii) solid state chemistry, iv) thermodynamics, v) elastic properties, vi) 
coating methodology and vii) coating tool design.