Independently tunable quint band electromagnetically induced transparency windows for multifunctional terahertz device

Independent tunability of electromagnetically induced transparent (EIT) multi-channels is highly desirable for multi-functional THz devices like multi-channel selective switching, multi-wavelength biosensing, filters, and slow light. We report independently tunable, graphene-based quint-EIT THz meta...

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Bibliographic Details
Published in:Applied physics. A, Materials science & processing Materials science & processing, 2023-06, Vol.129 (6), Article 436
Main Authors: Bhati, Ruchi, Jewariya, Mukesh, Malik, Anil K.
Format: Article
Language:English
Subjects:
Applied physics
Characterization and Evaluation of Materials
Condensed Matter Physics
Electromagnetic wave filters
Graphene
Machines
Manufacturing
Materials science
Nanotechnology
Optical and Electronic Materials
Physics
Physics and Astronomy
Processes
Spectral bands
Surfaces and Interfaces
Terahertz frequencies
Thin Films
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Summary:Independent tunability of electromagnetically induced transparent (EIT) multi-channels is highly desirable for multi-functional THz devices like multi-channel selective switching, multi-wavelength biosensing, filters, and slow light. We report independently tunable, graphene-based quint-EIT THz metasurface, made of closed kite-shaped square ring resonators (CKSSRR). In our simulations, we consider three concentric CKSSRR, which offer quint band EIT-like transmission features. The metastructure is polarization insensitive for THz frequencies. We observe that the number of EIT bands can be increased by adding outer kite rings, which can further extend the spectral range of operation of the device. We also propose an analytical model for ‘ n ’ operational EIT spectral bands. The EIT-like behavior is well supported by the distribution of induced current and group delays. The proposed novel method can open new doors to design multi-purpose terahertz (THz) meta-devices with a large number of EIT bands.
ISSN:0947-8396
1432-0630
DOI:10.1007/s00339-023-06685-z