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High-Q nanomechanical resonators

The quality factor (Q) is a measure of the energy loss of a resonator. The higher Q, the lower the loss of energy. A high Q is typically desired in most applications of micro and nanomechanical resonators, e.g., as mass or force sensors, as coupling element in optomechanics, or for fundamental research in quantum mechanics. We are working on minimising mechanics losses and on maximising the stress-induced damping dilution effect particularly in silicon nitride resonators.

Key Publications

  • P. Sadeghi, M. Tanzer, L. Christensen, S. Schmid:
    "Influence of Clamp-Widening on the Quality Factor of Nanomechanical Silicon Nitride Resonators";
    Journal of Applied Physics, Vol.126 (2019), Issue 16; 1651081 - 1651088.
  • P. Sadeghi and S. Schmid, "Reducing surface loss at room temperature in nanomechanical silicon nitride resonators", presented at Frontiers of Nanomechanical Systems (FNS/2019) in Palm Springs, USA, p. 105, 2019.
  • G.A. Brawley, M.R. Vanner, P. Larsen, S. Schmid, A. Boisen, W.P. Bowen, "Non-linear optomechanical measurement of mechanical motion", Nature Communications, 7 (2016).
  • T. Bagci, A. Simonsen, S. Schmid, L. Villanueva, E. Zeuthen, J. Appel, J.M. Taylor, A.S. Sorensen, K. Usami, A. Schliesser, E.S. Polzik, "Optical detection of radio waves through a nanomechanical transducer", Nature, 507 (2014), 7490; 81 - 85.
  • L. G. Villanueva and S. Schmid, "Evidence of Surface Loss as Ubiquitous Limiting Damping Mechanism in SiN Micro- and Nanomechanical Resonators," Phys. Rev. Lett. 113,  227201 (2014).
  • S. Schmid, K. D. Jensen, K. H. Nielsen, and A. Boisen. “Damping Mechanisms in high-Q Micro and Nanomechanical String Resonators.” Phys. Rev. B 84, 1 (2011).