Electrically Tunable Slow Light Using Graphene Metamaterials

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Metamaterials with classical analogues of electromagnetically induced transparency open new avenues in photonics for realizing smaller, more efficient slow light devices without quantum approaches. However, most of the metamaterial-based slow light devices are passive, which limits their practical applications. Here, by combining diatomic metamaterials with a gated single-layer graphene, we demonstrate that the group delay of terahertz light can be dynamically controlled under a small gate voltage. Using a two coupled harmonic oscillators model, we show that this active control of group delay is made possible by an effective control of the dissipative loss of the radiative dark resonator by varying the graphene's optical conductivity. Our work may provide opportunities in the design of various applications such as compact slow light devices and ultrasensitive sensors and switches.
Publisher
AMER CHEMICAL SOC
Issue Date
2018-05
Language
English
Article Type
Article
Keywords

ELECTROMAGNETICALLY INDUCED TRANSPARENCY; PLASMON-INDUCED TRANSPARENCY; SPLIT-RING RESONATORS; STORAGE; ANALOG

Citation

ACS PHOTONICS, v.5, no.5, pp.1800 - 1807

ISSN
2330-4022
DOI
10.1021/acsphotonics.7b01551
URI
http://hdl.handle.net/10203/244062
Appears in Collection
ME-Journal Papers(저널논문)
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