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Published on: May 29, 2014
Fractal-like Mechanical Resonators with a Soft-Clamped Fundamental Mode
S A Fedorov1, A Beccari1, N J Engelsen1
1Institute of Physics (IPHYS), École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland.
Abstract:
Self-similar structures occur naturally and have been employed to engineer exotic physical properties. We show that acoustic modes of a fractal-like system of tensioned strings can display increased mechanical quality factors due to the enhancement of dissipation dilution. We describe a realistic resonator design in which the quality factor of the fundamental mode is enhanced by as much as 2 orders of magnitude compared to a simple string with the same size and tension. Our findings can open new avenues in force sensing, cavity quantum optomechanics, and experiments with suspended test masses.
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