利用带隙边缘法诺共振的 GHz 表面波声子晶体生物传感器

IF 1.5 4区物理与天体物理 Q3 PHYSICS, APPLIED

Japanese Journal of Applied Physics Pub Date : 2023-12-28 DOI:10.35848/1347-4065/ad193a

Wenlou Yuan, A. Nagakubo, Oliver Wright, H. Ogi

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引用次数: 0

摘要

我们提出了一种基于 GHz 表面声波纳米柱声波晶体的超高灵敏度生物传感器，它利用了带隙边缘的法诺共振。通过数值模拟，我们发现由局部纳米柱共振和表面声波之间的模式耦合引起的法诺共振在声波晶体带隙边缘产生的非对称、尖锐和可控的透射凹陷可以对附着的生物分子进行超灵敏检测。对这种质量负载的影响进行了研究，结果表明检测极限为阿托克，每个金纳米柱的 "开-关 "触发都在亚微克级。这项研究为声波晶体和超高频表面声波器件的生物传感应用开辟了前沿领域。

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

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 of the phononic crystal 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.

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来源期刊

Japanese Journal of Applied Physics 物理-物理：应用

CiteScore

3.00

自引率

26.70%

发文量

818

审稿时长

3.5 months

期刊介绍： The Japanese Journal of Applied Physics (JJAP) is an international journal for the advancement and dissemination of knowledge in all fields of applied physics. JJAP is a sister journal of the Applied Physics Express (APEX) and is published by IOP Publishing Ltd on behalf of the Japan Society of Applied Physics (JSAP). JJAP publishes articles that significantly contribute to the advancements in the applications of physical principles as well as in the understanding of physics in view of particular applications in mind. Subjects covered by JJAP include the following fields: • Semiconductors, dielectrics, and organic materials • Photonics, quantum electronics, optics, and spectroscopy • Spintronics, superconductivity, and strongly correlated materials • Device physics including quantum information processing • Physics-based circuits and systems • Nanoscale science and technology • Crystal growth, surfaces, interfaces, thin films, and bulk materials • Plasmas, applied atomic and molecular physics, and applied nuclear physics • Device processing, fabrication and measurement technologies, and instrumentation • Cross-disciplinary areas such as bioelectronics/photonics, biosensing, environmental/energy technologies, and MEMS