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Ultrafast Frequency Shift of Electromagnetically Induced Transparency in Terahertz Metaphotonic Devices
Author(s) -
Hu Yuze,
Jiang Tian,
Sun Hao,
Tong Mingyu,
You Jie,
Zheng Xin,
Xu Zhongjie,
Cheng Xiangai
Publication year - 2020
Publication title -
laser and photonics reviews
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.778
H-Index - 116
eISSN - 1863-8899
pISSN - 1863-8880
DOI - 10.1002/lpor.201900338
Subject(s) - electromagnetically induced transparency , terahertz radiation , ultrashort pulse , photonics , optoelectronics , resonance (particle physics) , transparency (behavior) , modulation (music) , frequency modulation , physics , materials science , optics , computer science , laser , radio frequency , telecommunications , acoustics , computer security , particle physics
Recently, the actively controlled meta‐atoms have been employed to manipulate terahertz (THz) waves allowing for the implementation of many functionalities operating. A salient example of such systems is the electromagnetically induced transparency (EIT) metaphotonic device, which opens up a new avenue for THz manipulations. However, these devices are currently limited to be tuned at a given frequency, which severely impedes their practical applications. Here, novel photo‐active THz meta‐atoms are proposed, whose EIT resonance is equipped with a frequency tuning functionality up to 36%. At different levels of optical pumping power, a substantial modulation of EIT resonance is realized at the fundamental and shifted frequency, respectively. Moreover, the ultrafast dynamics manifest the switching time scale of ≈1 ns. This configuration is easily extensible by other types of stimuli, which may contribute to the development of multifunctional active tuning meta‐photonic systems.