Ultrafast Modulation of THz Waves Based on MoTe2-Covered Metasurface
Abstract
:1. Introduction
2. Materials and Methods
2.1. MoTe2-Covered EIT Metasurface
2.2. Optical Pump and Terahertz Probe (OPTP) Measurement
3. Results
3.1. Simulation
3.2. Experimental Results
3.2.1. Pump-Fluence Controlled THz Transmission and Slow Light Behavior
3.2.2. Ultrafast Dynamics of the Switching
4. Conclusions and Perspective
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Material | Thickness (nm) | Switching Time (ps) | Pump Threshold (μJ/cm2) | Simulated Photoconductivity (S/m) | Modulation Depth |
---|---|---|---|---|---|
[33] Si | 500 | 780 (half-recovery state) | 200 | 600 | 100% |
[57] Ge | 200 | 15 | 2200 | 1000 | 100% |
[55] WSe2 | 40 | 8 | 800 | 4800 | 43% |
MoTe2 | 10 | <300 (half-recovery state) | 3200 | >2 × 104 | 77% |
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Xu, X.; Lou, J.; Gao, M.; Wu, S.; Fang, G.; Huang, Y. Ultrafast Modulation of THz Waves Based on MoTe2-Covered Metasurface. Sensors 2023, 23, 1174. https://doi.org/10.3390/s23031174
Xu X, Lou J, Gao M, Wu S, Fang G, Huang Y. Ultrafast Modulation of THz Waves Based on MoTe2-Covered Metasurface. Sensors. 2023; 23(3):1174. https://doi.org/10.3390/s23031174
Chicago/Turabian StyleXu, Xing, Jing Lou, Mingxin Gao, Shiyou Wu, Guangyou Fang, and Yindong Huang. 2023. "Ultrafast Modulation of THz Waves Based on MoTe2-Covered Metasurface" Sensors 23, no. 3: 1174. https://doi.org/10.3390/s23031174