GHz surface-wave phononic crystal biosensor using a Fano resonance at the bandgap edge

被引：1

作者：

Yuan, Wenlou ^{[1
]}

Nagakubo, Akira ^{[1
]}

Wright, Oliver B. ^{[1
,2
]}

Ogi, Hirotsugu ^{[1
]}

机构：

[1] Osaka Univ, Grad Sch Engn, Yamadaoka 2-1, Suita, Osaka 5650871, Japan

[2] Hokkaido Univ, Sapporo, Hokkaido 0600808, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2024年 / 63卷 / 01期

关键词：

phononic crystal; Fano resonance; bandgap; biosensor; MICROBALANCE; ADSORPTION;

D O I：

10.35848/1347-4065/ad193a

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We propose an ultrahigh-sensitivity biosensor based on a GHz surface-acoustic-wave nanopillar phononic crystal using a Fano resonance at the bandgap edge. By means of numerical simulations, we find that the asymmetric, sharp and controllable transmission dip at the bandgap edge arising from the Fano resonance, which is caused by mode coupling between a local nanopillar resonance and the surface acoustic waves, allows ultrasensitive detection of attached biomolecules. The effect of such mass loading is studied, showing an attogram detection limit, and a unique "on-off" triggering at the sub-femtogram level for each individual Au nanopillar. This study opens up frontiers for biosensing applications of phononic crystals and ultrahigh-frequency surface acoustic wave devices.

引用

页数：6

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