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SUMMARY:Investigation of Effects of Assist Ion Bombardment and Doping on Me
 chanical Loss of Tantala Thin Films for Gravitational Wave Interferometers
LOCATION:Chemistry A101
TZID:America/Denver
DTSTART:20192201T000000
UID:2026-04-24-11-20-45@natsci.colostate.edu
DTSTAMP:20260424T112045
Description:Research Seminar Abstract\n\nReduction of Brownian thermal nois
 e due to mechanical loss in high-reflectivity mirror coatings is critical 
 for improving the sensitivity of future gravitational wave detectors. In t
 hese mirrors\, the mechanical loss at room temperature is dominated by the
  high refractive index component\, amorphous tantala (Ta2O5). Our work inv
 estigates solutions to decrease the coating\\'s mechanical loss. The use o
 f assist ion bombardment with low energy Ar+ and Xe+ during deposition was
  implemented  to identify effects on coating\\'s structural and mechanic
 al properties. Doping tantala with other oxides was also researched. 4:00 
 pm
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