Radio-frequency optomechanical characterization of a silicon nitride drum

Pearson, A. N. and Khosla, Kiran and Mergenthaler, M. and Briggs, G. Andrew D. and Laird, Edward and Ares, N. (2020) Radio-frequency optomechanical characterization of a silicon nitride drum. Scientific Reports, 10. ISSN 2045-2322

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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.

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Journal Article
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Scientific Reports
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10 Feb 2020 09:50
Last Modified:
17 Sep 2023 02:45