17–21 May 2021
remote
Europe/Rome timezone

Performance of Optimized Ternary Coatings at Ambient and Cryo Temperatures

19 May 2021, 07:30
5m
remote

remote

talk Coating thermal noise workshop Coating thermal noise Workshop

Speaker

Prof. Innocenzo M Pinto (University of Naples "Federico II", INFN, LVK and Centro Fermi)

Description

The structure of ternary coatings featuring minimum thermal (Brownian) noise under prescribed transmittance and absorbance constraints is investigated and found to consist of a few tapered quasi-Bragg triplets on top of an almost fixed-thickness stack of wuasi Bragg doublets using the highest contrast material pair.
The noise reduction of coatings based on aSi, TiO2::Ta2O5 and SiO2 as well as SiNx, TiO2::Ta2O5 and SiO2 at 290K, 120K and 20K is evaluated by comparison with alternative recipes.

Primary author

Prof. Innocenzo M Pinto (University of Naples "Federico II", INFN, LVK and Centro Fermi)

Co-author

Prof. Vincenzo Pierro (DING, University of Sannio at Benevento)

Presentation materials