Damping of metallized bilayer nanomechanical resonators at room temperature

Seitner, Maximilian; Gajo, Katrin; Weig, Eva M.

Damping of metallized bilayer nanomechanical resonators at room temperature

Dateien

Seitner_0-268181.pdfGröße: 682.42 KBDownloads: 978

Datum

2014

Open Access-Veröffentlichung

Open Access Gold

Sammlungen

Physik

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Applied Physics Letters. 2014, 105(21), 213101. ISSN 0003-6951. eISSN 1077-3118. Available under: doi: 10.1063/1.4902430

Zusammenfassung

We investigate the influence of gold thin-films subsequently deposited on a set of initially bare, doubly clamped, high-stress silicon nitride string resonators at room temperature. Analytical expressions for resonance frequency, quality factor and damping for both in- and out-of-plane flexural modes of the bilayer system are presented, which allows for the determination of effective elastic parameters of the composite structure from our experimental data. We find the inverse quality factor to scale linearly with the gold film thickness, indicating that the overall damping is governed by losses in the metal. Correspondingly, the mechanical linewidth increases by more than one order of magnitude compared to the bare silicon nitride string resonator. Furthermore, we extract mechanical quality factors of the gold film for both flexural modes and show that they can be enhanced by complete deposition of the metal in a single step, suggesting that surface and interface losses play a vital role in metal thin-films.

Fachgebiet (DDC)

530 Physik

Schlagwörter

Metallic thin films, Gold, Optical resonators, Dielectric nitrides, String theory

Zitieren

ISO 690

SEITNER, Maximilian, Katrin GAJO, Eva M. WEIG, 2014. Damping of metallized bilayer nanomechanical resonators at room temperature. In: Applied Physics Letters. 2014, 105(21), 213101. ISSN 0003-6951. eISSN 1077-3118. Available under: doi: 10.1063/1.4902430

BibTex

@article{Seitner2014Dampi-29597,
  year={2014},
  doi={10.1063/1.4902430},
  title={Damping of metallized bilayer nanomechanical resonators at room temperature},
  number={21},
  volume={105},
  issn={0003-6951},
  journal={Applied Physics Letters},
  author={Seitner, Maximilian and Gajo, Katrin and Weig, Eva M.},
  note={Article Number: 213101}
}

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