Focusing on the realization of excellent sensing for graphene-based metasurface in the terahertz band. A planar monolayer graphene metasurface is proposed for sensing. Dual plasmon induced transparency (dual-PIT) phenomenon is realized in our proposed metasurface by use of the finite-difference time-domain (FDTD) method. This dual-PIT transmission spectrum can be effectively modulated by Fermi energies and positional parameters, and triple-PIT phenomenon can be realized. Interestingly, the excellent sensing performance can be achieved in terahertz band. The maximum sensitivity and Figure of Merit (FOM) are of 4.1884 THz/RIU and 43.31, respectively. These results may play an important role for designing excellent plasmonic graphene-based modulators and sensors in terahertz.

专注于在太赫兹波段实现基于石墨烯的超表面的卓越传感。提出了一种平面单层石墨烯超表面用于传感。通过使用有限差分时域（FDTD）方法，在我们提出的超表面中实现了双等离子体诱导透明（双 PIT）现象。这种双 PIT 传输光谱可以通过费米能量和位置参数进行有效调制，并且可以实现三重 PIT 现象。有趣的是，在太赫兹波段可以实现出色的传感性能。最大灵敏度和品质因数 (FOM) 分别为 4.1884 THz /RIU和 43.31。这些结果可能对设计优良的基于等离子体石墨烯的太赫兹调制器和传感器发挥重要作用。