Dissipative acousto-mechanical parametric interface between high-overtone acoustics and flexural phonons
Abstract
High-overtone bulk acoustic wave resonators (HBARs) promise advanced phononics, yet achieving nonlinearity remains challenging. We demonstrate a radiation-pressure-type parametric interaction between GHz HBARs and low-frequency flexural modes in a suspended silicon nitride membrane, where mechanical displacement modulates the external dissipation rate to enable dissipative acousto-mechanical coupling. Benefiting from the high quality factor, the system enters the resolved-sideband regime at room temperature, yielding acousto-mechanically induced transparency. We observe tunable Kerr nonlinearity and generate coherent HBAR frequency combs via two-tone driving. Notably, our dissipative coupling strength is 20 times larger than the dispersive coupling, the highest ratio among reported hybrid dissipative-dispersive coupling systems, resulting in the experimental observation of amplification in the reflection spectra under red-sideband driving. The ability to interface dense HBAR modes with a common mechanical resonator provides a scalable on-chip platform for multimode phononic information processing, with quantum phononics potentially achievable at sub-Kelvin temperatures.
Versions
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BibTeX
@misc{ji2026dissipative,
title = {{Dissipative acousto-mechanical parametric interface between high-overtone acoustics and flexural phonons}},
author = {Xun Ji and Huanying Sun and Longhao Wu and Qichun Liu and Yulong Liu and Mika A. Sillanpää and Tiefu Li},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2605.24581},
eprint = {2605.24581},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2605.24581},
note = {CC BY-NC-ND 4.0},
}
RIS
TY - UNPB
TI - Dissipative acousto-mechanical parametric interface between high-overtone acoustics and flexural phonons
AU - Xun Ji
AU - Huanying Sun
AU - Longhao Wu
AU - Qichun Liu
AU - Yulong Liu
AU - Mika A. Sillanpää
AU - Tiefu Li
PY - 2026
DA - 2026/09/17
PB - arXiv
DO - 10.48550/arxiv.2605.24581
UR - https://arxiv.org/abs/2605.24581
AB - High-overtone bulk acoustic wave resonators (HBARs) promise advanced phononics, yet achieving nonlinearity remains challenging. We demonstrate a radiation-pressure-type parametric interaction between GHz HBARs and low-frequency flexural modes in a suspended silicon nitride membrane, where mechanical displacement modulates the external dissipation rate to enable dissipative acousto-mechanical coupling. Benefiting from the high quality factor, the system enters the resolved-sideband regime at room temperature, yielding acousto-mechanically induced transparency. We observe tunable Kerr nonlinearity and generate coherent HBAR frequency combs via two-tone driving. Notably, our dissipative coupling strength is 20 times larger than the dispersive coupling, the highest ratio among reported hybrid dissipative-dispersive coupling systems, resulting in the experimental observation of amplification in the reflection spectra under red-sideband driving. The ability to interface dense HBAR modes with a common mechanical resonator provides a scalable on-chip platform for multimode phononic information processing, with quantum phononics potentially achievable at sub-Kelvin temperatures.
ER -