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MM: Fachverband Metall- und Materialphysik

MM 19: Poster Session

MM 19.41: Poster

Dienstag, 10. März 2026, 18:00–20:00, P5

Perturbation theory for light-induced frequency shifts of thin quartz acoustic resonators — •Marinus Lehmann, Marek Bekir, and Carsten Henkel — Universität Potsdam, Institut für Physik und Astronomie, Germany

Quartz microbalance devices (QCM) are widely used for high precision mass measurements and the characterisation of liquid overlayers. In addition, QCMs are sensitive to various environmental changes like heating due to light irradiation. A light-induced shift of the acoustic resonance frequency has been shown by various groups [1,2]. Its explanation requires a combination of acoustic theory [3] with calculations for heat conduction [4] to model the cross-coupling between static thermal strain and the acoustic resonance. We try to clarify the mechanism by focussing on the time constants of the frequency shift transients.

[1] L. H. Goodman, E. S. Bililign, B. W. Keller, S. G. Kenny, and J. Krim, J. Appl. Phys. 124 (2018) 024502
[2] Ph. Ortner, M. Umlandt, N. Lomadze, S. Santer, and M. Bekir, Analyt. Chem. 95 (2023) 15645
[3] H. F. Tiersten, J. Acoust. Soc. Am. 59 (1976) 879
[4] J. P. Valentin, J. Appl. Phys. 57 (1985) 492

Keywords: quartz microbalance; acoustic resonator; heat conduction; anisotropic elastic constants