期刊
OPTICAL MATERIALS EXPRESS
卷 7, 期 9, 页码 3397-3407出版社
OPTICAL SOC AMER
DOI: 10.1364/OME.7.003397
关键词
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资金
- Natural Science Foundation of Shandong Province, China [ZR2016FM09, ZR2016FM32]
- National Natural Science Foundation of China [61775123]
- Qingdao city innovative leading talent plan [13-CX-25]
A numerical and theoretical study is presented on the realization of the tunable plasmon-induced transparency (PIT) effect in Dirac semimetal films (DSFs) that are known as three-dimensional graphene. The weak hybridization between the two parallel bright modes leads to the novel PIT optical response. The properties of the PIT system can be controlled by adjusting the geometric parameters of the DSF strips. Meanwhile, the resonant frequency of the PIT can be dynamically tuned by varying the Fermi energy of the DSFs instead of refabricating the structures. Correspondingly, by adjusting the Fermi energy of the DSFs, a large group delay of more than 1.86 ps is obtained in the vicinity of the transparency peaks. Such proposed DSFs-based PIT system may open up avenues for tunable terahertz switching, slow-light devices, sensing technology and some other THz devices. (C) 2017 Optical Society of America
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