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.

中文翻译：

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使用生物功能化锗风扇谐振器的太赫兹亚波长传感

基于高掺杂半导体微结构（如天线）的局部表面等离子体共振（LSPR）可以设计为在太赫兹频率下表现出共振特征。在这项工作中，我们展示了具有从 Fano 耦合到暗模式的品质因数 LSPR 增加的等离子体天线。我们还讨论了用于特定蛋白质固定和细胞接口的 n 掺杂 Ge 天线的生物功能化进展。最后，使用厚度为几百纳米的白蛋白生物层来展示风扇耦合 n-Ge 天线作为传感器的性能。由于生物层的存在，传输中超过 10% 的共振变化可以在仅 20 的带宽内检测到千兆赫。