Systematic design of high-Q prestressed micro membrane resonators

Wenjun Gao*, Fengwen Wang, Ole Sigmund

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

Quality factor (Q) and frequency-quality factor (Qf) of prestressed membrane resonators are enhanced by topology optimization. The optimization targets the fundamental mode which is more easily identified in physical experiments compared to high-order modes embedded in possibly dense frequency ranges. Both intrinsic and extrinsic losses are considered in the optimization process. With different combinations of the two damping sources, topology optimization yields distinct designs, which reveals that damping mechanisms significantly affect the optimal geometry of micro resonators. For optimized designs, the Qf in the fundamental mode exceeds the minimum requirement for room-temperature quantum optomechanics (6.2×1012 Hz) and reaches 1013 Hz in numerical experiments.
Original languageEnglish
Article number112692
JournalComputer Methods in Applied Mechanics and Engineering
Volume361
ISSN0045-7825
DOIs
Publication statusPublished - 2020

Keywords

  • Topology optimization
  • Prestressed membranes
  • Resonators
  • Quality factor
  • Frequency-quality factor

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