P37 - Detection of nm-Scale Displacements at Frequencies down to 1 mHz by Differential Laser Doppler Vibrometry
- Event
- SMSI 2023
2023-05-08 - 2023-05-11
Nürnberg - Band
- Poster
- Chapter
- Poster
- Author(s)
- D. Kohlmann, H. Wulfmeier, H. Fritze - Technical University of Clausthal, Goslar (Germany), M. Schewe, C. Rembe - Technikal University of Clausthal, Clausthal-Zellerfeld, (Germany)
- Pages
- 352 - 353
- DOI
- 10.5162/SMSI2023/P37
- ISBN
- 978-3-9819376-8-8
- Price
- free
Abstract
The displacement of the surface of a sample is detected contact-less by Differential Laser Doppler Vibrometry (D-LDV) at elevated temperatures. The time signal contains the phase difference of the measurement and reference laser beams, already greatly reducing noise from, e.g., length fluctuations, heat haze, and mechanical vibrations. In postprocessing of the data, anharmonic signal contributions are identified and extracted to show the correct thickness changes of thin films and related sample bending. The approach is demonstrated on a Pr0.1Ce0.9O2–δ (PCO10) thin film sample.