We present a free-standing terahertz metasurface supercell that consists of four complementary mirrored asymmetric split-rectangular resonators. The quality factor of the excited resonance of this supercell has been significantly improved by 250% when compared to its counterpart nonmirrored supercell. The mirroring of the resonators leads to an enhanced out-of-phase oscillating current in each neighboring resonators of the supercell. In turn, this leads to a suppression of the dipole moments and its corresponding scattered fields. Moreover, this design can be realized by utilizing a simple laser machining technique. Furthermore, we numerically evaluate the performance of this design as a label-free biosensor for thin-film analytes and biomolecules such as double-stranded DNA and single-stranded RNA viruses. A sensitivity level of 1.14 × 10⁵ nm/refractive index unit (RIU) can be achieved using this design. Therefore, this design has the potential to be used as an effective label-free biomedical sensor for in-situ detection of various biomolecules.

中文翻译：

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具有独立式互补超级细胞太赫兹超颖表面的生物医学传感

我们提出了一个独立的太赫兹超表面超级电池，它由四个互补的镜像非对称分裂矩形谐振器组成。与它的同类非镜像超级电池相比，该超级电池的激发共振的品质因数已显着提高了250％。谐振器的镜像导致超级电池的每个相邻谐振器中的异相振荡电流增加。反过来，这导致偶极矩及其相应的散射场受到抑制。而且，可以通过利用简单的激光加工技术来实现该设计。此外，我们在数字上评估了这种设计作为薄膜分析物和生物分子（例如双链DNA和单链RNA病毒）的无标记生物传感器的性能。灵敏度为1.14×10使用此设计可以实现⁵ nm /折射率单位（RIU）。因此，该设计有可能用作有效的无标记生物医学传感器，用于各种生物分子的原位检测。