Direct stress optic coefficients for YTZP ceramic and PTFE at GHz frequencies

Peter Schemmel, Gilles Diederich, Andrew J. Moore

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)
118 Downloads (Pure)


We report the first measurement of the direct stress optic coefficient for yttria-partially stabilized zirconia (YTZP) ceramic, using illumination between 260 and 380 GHz with applied stresses up to 27 MPa. YTZP exhibited a linear change in refractive index as a function of stress across the entire applied stress domain. A direct stress optic coefficient was also measured for polytetrafluoroethylene (PTFE). PTFE showed viscoelastic behavior at stress values above 4.5 MPa. These results open the way for quantitative sub-surface stress measurements in structural ceramics and ceramic coating systems at GHz and THz frequencies.
Original languageEnglish
Pages (from-to)8110-8119
Number of pages10
JournalOptics Express
Issue number8
Early online date6 Apr 2016
Publication statusPublished - 18 Apr 2016


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