Bulletin of the American Physical Society
2024 APS March Meeting
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session F53: Quantum Optomechanics and Transducers
8:00 AM–10:48 AM,
Tuesday, March 5, 2024
Room: 202AB
Sponsoring
Units:
DQI DCMP
Chair: Changqing Wang, Fermilab
Abstract: F53.00006 : Wide-band, tunable and high-efficiency microwave-to-acoustics transduction on lithium niobate
9:00 AM–9:12 AM
Presenter:
Abel Hugot
(Univ. Grenoble Alpes, CNRS, Institut Néel)
Authors:
Abel Hugot
(Univ. Grenoble Alpes, CNRS, Institut Néel)
Quentin A Greffe
(Univ. Grenoble Alpes, CNRS, Institut Néel)
Franck Balestro
(Univ. Grenoble Alpes, CNRS, Institut Néel)
Jérémie J Viennot
(Univ. Grenoble Alpes, CNRS, Institut Néel)
We propose a wide-band high-efficiency transducer to perform microwave-to-acoustics transduction where an interdigital transducer (IDT) is used to couple to Lamb waves in suspended Lithium Niobate. By using a SQUID array, we design a magnetic flux tunable impedance matching network that optimizes power conversion at the IDT despite its frequency dependent impedance.
Measurements at cryogenic temperatures show that this bi-directional transducer can reach high efficiencies over large bandwidths (typically 400 MHz) and can be tuned over a wide frequency band (4-8GHz). This device is a building block for quantum acoustics experiments and could be used to perform the acoustic spectroscopy of quantum objects or couple superconducting qubits to mechanical degrees of freedom.
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