Chinese Optics Letters, Vol. 18, Issue 9, 092402 (2020)
Active formatting modulation of electromagnetically induced transparency in metamaterials
Hao Sun1, Yuhua Tang1, Yuze Hu2, Jie You3, Hengzhu Liu1, and Xin Zheng3,*
- 1College of Computer, National University of Defense Technology, Changsha 410073, China
- 2College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China
- 3National Innovation Institute of Defense Technology, Beijing 100010, China
We experimentally demonstrate for the first time an active all-optical ultrafast modulation of electromagnetically induced transparency-like effect in a hybrid device of sapphire/Si/metamaterial. From numerical simulations, it can be deducted that the tuning process is attributed to the coupling between the dark mode existing in split-ring resonators and the bright mode existing in cut wire resonators. The transmission amplitude modulation is accompanied by the slow-light effect. In addition, the ultrafast formation process is measured to be as fast as 2 ps. This work should make an important contribution to novel chip-scale photonic devices and terahertz communications.
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