基于二氧化钒和光敏硅的可切换可调谐太赫兹超材料

Zhang Xin, Wang Guan, Liu Jia, Zuo Shiyi, Li Meichen, Yang Shuang, Jia Yang, Gao Yachen

Electronic Engineering College, Heilongjiang University, Harbin 150080, China.

College of Communication and Electronic Engineering, Qiqihar University, Qiqihar 161000, China.

Nanomaterials (Basel). 2023 Jul 24;13(14):2144. doi: 10.3390/nano13142144.

A switchable and tunable terahertz (THz) metamaterial based on photosensitive silicon and Vanadium dioxide (VO) was proposed. By using a finite-difference time-domain (FDTD) method, the transmission and reflective properties of the metamaterial were investigated theoretically. The results imply that the metamaterial can realize a dual electromagnetically induced transparency (EIT) or two narrow-band absorptions depending on the temperature of the VO. Additionally, the magnitude of the EIT and two narrow-band absorptions can be tuned by varying the conductivity of photosensitive silicon (PSi) via pumping light. Correspondingly, the slow-light effect accompanying the EIT can also be adjusted.

提出了一种基于光敏硅和二氧化钒（VO₂）的可切换且可调谐的太赫兹（THz）超材料。通过使用时域有限差分（FDTD）方法，从理论上研究了该超材料的透射和反射特性。结果表明，根据VO₂的温度，该超材料可以实现双电磁诱导透明（EIT）或两个窄带吸收。此外，通过泵浦光改变光敏硅（PSi）的电导率，可以调节EIT的幅度和两个窄带吸收。相应地，伴随EIT的慢光效应也可以得到调整。