期刊
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION
卷 38, 期 6, 页码 784-789出版社
OPTICAL SOC AMER
DOI: 10.1364/JOSAA.420743
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资金
- National Natural Science Foundation of China [11804093, 11847026, 61764005]
- Natural Science Foundation of Jiangxi Province [20192BAB212003, 20202ACBL212005, 20202BABL201019]
- Scientific Research Fund of Sichuan Provincial Science and Technology Department [2020YJ0137]
- Jiangxi Province Graduate Innovation Special Fund Project [YC2020S312]
In this research, multilayer graphene metamaterials are utilized to achieve dynamic plasmon-induced transparency, allowing for redshifts or blueshifts at different frequencies. By adjusting the Fermi level of graphene, frequency selectors and electro-optical switches can be realized.
In this study, multilayer graphene metamaterials comprising graphene blocks and graphene ribbon are proposed to realize dynamic plasmon-induced transparence (PIT). By changing the position between the graphene blocks, PIT phenomenon will occur in different terahertz bands. Furthermore, PIT with a transparent window width of 1 THz has been realized. In addition, the PIT shows redshifts or blueshifts or disappears altogether upon changing the Fermi level of graphene, and hence a frequency selector from 3.91 to 7.84 THz and an electro-optical switch can be realized. Surprisingly, the group index of this structure can be increased to 469. Compared with the complex and fixed structure of previous studies, our proposed structure is simple and can be dynamically adjusted according to demands, which makes it a valuable platform for ideas to inspire the design of novel electro-optic devices. (c) 2021
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