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Radio-frequency optomechanical characterization of a silicon nitride drum

Research output: Contribution to journalJournal article

Published
  • A. N. Pearson
  • Kiran Khosla
  • M. Mergenthaler
  • G. Andrew D. Briggs
  • Edward Laird
  • N. Ares
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Article number1654
<mark>Journal publication date</mark>3/02/2020
<mark>Journal</mark>Scientific Reports
Volume10
Number of pages7
Publication statusPublished
Original languageEnglish

Abstract

On-chip actuation and readout of mechanical motion is key to characterize mechanical resonators and exploit them for new applications. We capacitively couple a silicon nitride membrane to an off resonant radio-frequency cavity formed by a lumped element circuit. Despite a low cavity quality factor (QE ≈ 7.4) and off resonant, room temperature operation, we are able to parametrize several mechanical modes and estimate their optomechanical coupling strengths. This enables real-time measurements of the membrane’s driven motion and fast characterization without requiring a superconducting cavity, thereby eliminating the need for cryogenic cooling. Finally, we observe optomechanically induced transparency and absorption, crucial for a number of applications including sensitive metrology, ground state cooling of mechanical motion and slowing of light.