Terahertz subwavelength sensing with bio-functionalized germanium fano-resonators

IF 1 4区工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

Frequenz Pub Date : 2022-08-15 DOI:10.1515/freq-2022-0078

C. Chavarin, E. Hardt, O. Skibitzki, T. Voß, Mohammed Eissa, Davide Spirito, G. Capellini, L. Baldassarre, J. Flesch, J. Piehler, C. You, Sönke Grüssing, F. Römer, B. Witzigmann

引用次数: 0

Abstract

Abstract Localized Surface Plasmon Resonances (LSPR) based on highly doped semiconductors microstructures, such as antennas, can be engineered to exhibit resonant features at THz frequencies. In this work, we demonstrate plasmonic antennas with increased quality factor LSPRs from Fano coupling to dark modes. We also discuss the advances in the biofunctionalization of n-doped Ge antennas for specific protein immobilization and cell interfacing. Finally, albumin biolayers with a thickness of a few hundred nanometers are used to demonstrate the performance of the fano-coupled n-Ge antennas as sensors. A resonant change of over 10% in transmission, due to the presence of the biolayer, can be detected within a bandwidth of only 20 GHz.

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生物功能化锗共振器的太赫兹亚波长传感

摘要基于高掺杂半导体微结构（如天线）的局域表面等离子体共振（LSPR）可以被设计为在太赫兹频率下表现出共振特征。在这项工作中，我们展示了从Fano耦合到暗模式的具有增加的质量因子LSPR的等离子体天线。我们还讨论了n-掺杂锗天线在特定蛋白质固定化和细胞界面连接方面的生物功能化进展。最后，使用厚度为几百纳米的白蛋白生物层来证明fano耦合n-Ge天线作为传感器的性能。由于生物层的存在，可以在仅20GHz的带宽内检测到传输中超过10%的谐振变化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Frequenz 工程技术-工程：电子与电气

CiteScore

2.40

自引率

18.20%

发文量

审稿时长

3 months

期刊介绍： Frequenz is one of the leading scientific and technological journals covering all aspects of RF-, Microwave-, and THz-Engineering. It is a peer-reviewed, bi-monthly published journal. Frequenz was first published in 1947 with a circulation of 7000 copies, focusing on telecommunications. Today, the major objective of Frequenz is to highlight current research activities and development efforts in RF-, Microwave-, and THz-Engineering throughout a wide frequency spectrum ranging from radio via microwave up to THz frequencies. RF-, Microwave-, and THz-Engineering is a very active area of Research & Development as well as of Applications in a wide variety of fields. It has been the key to enabling technologies responsible for phenomenal growth of satellite broadcasting, wireless communications, satellite and terrestrial mobile communications and navigation, high-speed THz communication systems. It will open up new technologies in communications, radar, remote sensing and imaging, in identification and localization as well as in sensors, e.g. for wireless industrial process and environmental monitoring as well as for biomedical sensing.