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Abstract
The coupling between acoustic vibrations in a lithium niobate bulk acoustic wave resonator and microwave photons of a re-entrant microwave cavity was investigated at a temperature close to 4 K. Coupling was achieved by placing the acoustic resonator in the location of the re-entrant cavity electric field maxima in a symmetric “split-post” configuration with a large overlap between the microwave field and the acoustic mode, allowing acoustic modulations of the microwave frequency. We show that the acoustic modes in this setup retain large inherent quality factors of greater than 106. A maximum optomechanical coupling rate was determined to be g0 = 0.014 mHz, four orders of magnitude larger than previous results obtained using a quartz BAW at 4 K in a similar experimental setup but using a single post-re-entrant cavity resonator.
Original language | English |
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Article number | 111304 |
Number of pages | 8 |
Journal | APL Photonics |
Volume | 9 |
Issue number | 11 |
DOIs | |
Publication status | Published - 14 Nov 2024 |
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Centre of Excellence for Dark Matter Particle Physics
Barberio, E. (Investigator 01), Williams, A. (Investigator 02), Bell, N. (Investigator 03), Stuchbery, A. (Investigator 04), Tobar, M. (Investigator 05), Boehm, C. (Investigator 06) & Wallner, A. (Investigator 07)
ARC Australian Research Council
1/01/20 → 31/12/26
Project: Research
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Wideband Tuneable Low Phase Noise Oscillators for 5G
Tobar, M. (Investigator 01), Goryachev, M. (Investigator 02) & Ivanov, E. (Investigator 03)
ARC Centre of Excellence for Engineered Quantum Systems
1/01/21 → 31/12/21
Project: Research