Reflector‐Free, Highly Confined Love‐Like SAWs Enabled by a Phononic Metasurface for Real‐Time Monitoring of Cell Dynamics
Abstract
Surface acoustic wave (SAW) devices are widely used in sensing and biosensing but generally suffer from strong attenuation in liquid environments. Conventional approaches rely on reflectors to reduce these losses, yet these components remain difficult to optimize: limited device miniaturization and increased fabrication complexity. Here, we introduce an innovative design strategy that integrates a phononic metasurface with tailored electromechanical properties of the substrate to generate a type of shear‐horizontal (SH) surface resonance modes that exhibit strong lateral confinement and extremely low radiation into both the substrate bulk and the free surface, eliminating the need for reflectors. This approach enables highly tailorable surface acoustic resonances with distinctive enhanced dynamic strain‐energy confinement leading to significantly high‐quality factors, particularly in water‐loaded conditions. We show the fabrication and experimental validation of the proposed phononic metasurface‐based SAW resonator and showcase its biosensing capabilities through real‐time monitoring of cellular death.
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BibTeX
@article{monaldi2026reflectorfree,
title = {{Reflector‐Free, Highly Confined Love‐Like SAWs Enabled by a Phononic Metasurface for Real‐Time Monitoring of Cell Dynamics}},
author = {Jessica Monaldi and Julio A Iglesias Martínez and Francis Kosior and Laurent Badie and Halima Alem and Frédéric Sarry and Mourad Oudich},
journal = {Advanced Functional Materials},
year = {2026},
month = oct,
doi = {10.1002/adfm.78711},
eprint = {2604.24436},
archivePrefix = {arXiv},
url = {https://hal.science/hal-05791094v1},
note = {CC BY-NC-ND 4.0},
}
RIS
TY - JOUR
TI - Reflector‐Free, Highly Confined Love‐Like SAWs Enabled by a Phononic Metasurface for Real‐Time Monitoring of Cell Dynamics
AU - Jessica Monaldi
AU - Julio A Iglesias Martínez
AU - Francis Kosior
AU - Laurent Badie
AU - Halima Alem
AU - Frédéric Sarry
AU - Mourad Oudich
PY - 2026
DA - 2026/10/10
JO - Advanced Functional Materials
DO - 10.1002/adfm.78711
UR - https://hal.science/hal-05791094v1
AB - Surface acoustic wave (SAW) devices are widely used in sensing and biosensing but generally suffer from strong attenuation in liquid environments. Conventional approaches rely on reflectors to reduce these losses, yet these components remain difficult to optimize: limited device miniaturization and increased fabrication complexity. Here, we introduce an innovative design strategy that integrates a phononic metasurface with tailored electromechanical properties of the substrate to generate a type of shear‐horizontal (SH) surface resonance modes that exhibit strong lateral confinement and extremely low radiation into both the substrate bulk and the free surface, eliminating the need for reflectors. This approach enables highly tailorable surface acoustic resonances with distinctive enhanced dynamic strain‐energy confinement leading to significantly high‐quality factors, particularly in water‐loaded conditions. We show the fabrication and experimental validation of the proposed phononic metasurface‐based SAW resonator and showcase its biosensing capabilities through real‐time monitoring of cellular death.
SN - 1616-301X
SN - 1616-3028
ER -