超材料
太赫兹辐射
材料科学
等离子体子
光电子学
半金属
分裂环谐振器
光学
谐振器
电磁感应透明
调制(音乐)
折射率
硅
物理
声学
作者
Yong Li,Sa Yang,Qiawu Lin,Shuang Li,Ming‐Yang Su,Liangpo Tang
出处
期刊:Applied Optics
[Optica Publishing Group]
日期:2023-08-29
卷期号:62 (27): 7139-7139
被引量:2
摘要
We numerically investigate a tunable plasmon-induced transparency based on bulk Dirac semimetal (BDS) metamaterial in the terahertz band. In the unit cell, the prominent transparent peak appears to be due to the interference between the cut wires (CWs) and split-ring resonators (SRRs). An active modulation via near-field coupling is obtained by varying the Fermi level of the BDS. Introducing photoactive silicon, it will be found that once the intensity of the pump light is adjusted, a tunable transparent peak will appear. Furthermore, by shifting the coupling distance between CWs and SRRs, the depth of the transparent peak will change accordingly. Finally, we place the structure in environments with different refractive indices, which will exhibit excellent sensitivity and facilitate the application of biochemical sensors. This simple and easy-to-fabricate metamaterial structure will have excellent potential applications in modulation, filters, and detection.
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