摘要
由于硅对太赫兹的调制效果较差,所以从理论上和实验上研究了基于硅基等离子诱导透明(PIT)超表面的太赫兹调制器。研究结果发现在透射光谱中可以观察到明显的透明窗口,该透明窗口是由2个谐振器之间的近场耦合引起的。实验结果表明,随着泵浦光功率的增加,透明窗口出现了蓝移。当光泵功率从0 m W增加到700 m W时,0.70 THz处的振幅调制深度可以达到80.75%,同时研究了它的慢光效应。设计的这种新型的超表面结构增强了硅的调制效果,提供了一种实际应用的可能。
Due to the poor modulation effect of silicon on terahertz,a terahertz modulator based on silicon-based plasma induced transparency(PIT)meta-surface was studied theoretically and experimentally.We have founded that a transparent window could be clearly observed in the transmission spectrum,which was caused by the near-field coupling between two resonators.The study results showed that when the optical power increased,the transparent window appeared blue shift.When the optical pump power increases from 0 m W to 700 m W,the modulation depth in 0.70 THz can reach 80.75%,meanwhile its slow light effect has been studied.The designed new meta-surface structure enhances the modulation effect of silicon and provides a practical application possibility.
作者
陈松林
乐进
王伟俊
蒋佳明
王怀兴
余文峰
CHEN Songlin;YUE Jin;WANG Weijun;JIANG Jiaming;WANG Huaixing;YU Wenfeng(School of Optical and Electronic Information,Huazhong University of Science and Technology,Wuhan 430074,China;Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan 430074,China)
出处
《激光杂志》
北大核心
2021年第1期34-39,共6页
Laser Journal
基金
联合基金(No.Grant No.U1930117)。
关键词
等离子体
诱导透明
调制器
太赫兹
超表面
plasma
induced transparency
modulator
terahertz
meta-surface
