Gigahertz-frequency Lamb-wave resonator cavities on suspended lithium niobate for quantum acoustics
Abstract
Phononic nanodevices offer a promising route toward quantum technologies, as phonons combine strong confinement within matter with broad coupling capabilities to various quantum systems. In particular, the piezoelectric response of materials, such as lithium niobate, enables coupling between superconducting qubits and gigahertz-frequency phonons. However, bulk lithium niobate phononic devices typically rely on surface acoustic waves and are therefore inherently subject to leakage from the surface into the bulk substrate. Here, we explore the acoustic behavior of resonator cavities supporting GHz-frequency Lamb waves in a 200-nm-thick suspended lithium niobate layer. We characterize the acoustic response at both room and millikelvin temperatures. We find that our resonator cavities with strong confinement reach intrinsic quality factors of approximately 6000 at the single phonon level. We use the measured parameters of the resonators to model their coupling to a superconducting transmon qubit, allowing us to evaluate their potential as quantum acoustic devices.
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BibTeX
@article{diego2026gigahertzfrequency,
title = {{Gigahertz-frequency Lamb-wave resonator cavities on suspended lithium niobate for quantum acoustics}},
author = {Michele Diego and Hong Qiao and Byunggi Kim and Minseok Ryu and Shiheng Li and Gustav Andersson and Masahiro Nomura and Andrew Cleland},
journal = {Physical Review Applied},
year = {2026},
month = jul,
doi = {10.1103/xt9r-h1q9},
eprint = {2601.13509},
archivePrefix = {arXiv},
url = {https://hal.science/hal-05736534v1},
note = {CC BY},
}
RIS
TY - JOUR
TI - Gigahertz-frequency Lamb-wave resonator cavities on suspended lithium niobate for quantum acoustics
AU - Michele Diego
AU - Hong Qiao
AU - Byunggi Kim
AU - Minseok Ryu
AU - Shiheng Li
AU - Gustav Andersson
AU - Masahiro Nomura
AU - Andrew Cleland
PY - 2026
DA - 2026/07/15
JO - Physical Review Applied
DO - 10.1103/xt9r-h1q9
UR - https://hal.science/hal-05736534v1
AB - Phononic nanodevices offer a promising route toward quantum technologies, as phonons combine strong confinement within matter with broad coupling capabilities to various quantum systems. In particular, the piezoelectric response of materials, such as lithium niobate, enables coupling between superconducting qubits and gigahertz-frequency phonons. However, bulk lithium niobate phononic devices typically rely on surface acoustic waves and are therefore inherently subject to leakage from the surface into the bulk substrate. Here, we explore the acoustic behavior of resonator cavities supporting GHz-frequency Lamb waves in a 200-nm-thick suspended lithium niobate layer. We characterize the acoustic response at both room and millikelvin temperatures. We find that our resonator cavities with strong confinement reach intrinsic quality factors of approximately 6000 at the single phonon level. We use the measured parameters of the resonators to model their coupling to a superconducting transmon qubit, allowing us to evaluate their potential as quantum acoustic devices.
SN - 2331-7019
ER -