A plasmonic terahertz perfect absorber based on L-shaped graphene patches and gold rods

Korani, Nastaran; Danaie, Mohammad

doi:10.1007/s00339-023-07096-w

Appl. Phys. A

2023

DOI: 10.1007/s00339-023-07096-w

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A plasmonic terahertz perfect absorber based on L-shaped graphene patches and gold rods

Nastaran Korani,

Mohammad Danaie

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2024

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Cited by 3 publications

References 86 publications

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Sensor and slow light based on plasmon-induced transparency in carbon nanotube rectangular split-ring resonator metamaterials

Li,

Pan,

Chen

et al. 2024

Opt Quant Electron

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Sensor and slow light based on plasmon-induced transparency in carbon nanotube rectangular split-ring resonator metamaterials

Li,

Pan,

Chen

et al. 2024

Opt Quant Electron

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A Metamaterials-Based Absorber Used for Switch Applications with Dynamically Variable Bandwidth in Terahertz Regime

Liu,

2024

Materials

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A broadband absorber based on metamaterials of graphene and vanadium dioxide (VO2) is proposed and investigated in the terahertz (THz) regime, which can be used for switch applications with a dynamically variable bandwidth by electrically and thermally controlling the Fermi energy level of graphene and the conductivity of VO2, respectively. The proposed absorber turns ‘on’ from 1.5 to 5.4 THz, with the modulation depth reaching 97.1% and the absorptance exceeding 90% when the Fermi energy levels of graphene are set as 0.7 eV, and VO2 is in the metallic phase. On the contrary, the absorptance is close to zero and the absorber turns ‘off’ with the Fermi energy level setting at 0 eV and VO2 in the insulating phase. Furthermore, other four broadband absorption modes can be achieved utilizing the active materials graphene and VO2. The proposed terahertz absorber may benefit the areas of broadband switch, cloaking objects, THz communications and other applications.

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Graphene and Vanadium Dioxide-Based Terahertz Absorber with Switchable Multifunctionality for Band Selection Applications

Liu,

Hu,

Liu

2024

Nanomaterials

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This study proposes a multifunctional absorber in the terahertz (THz) regime based on vanadium dioxide (VO2) and graphene with either–or band selector applications, which can be realized by electrically and thermally controlling the Fermi energy level of graphene and vanadium dioxide, respectively. The broadband absorption can be achieved with absorptance exceeding 90%, when the VO2 film is in the metallic phase and the Fermi energy levels of the upper and lower graphene layers are simultaneously set to 0.6 and 0 eV, respectively. The double narrowband can be realized when the VO2 film is in the insulating phase and the Fermi energy levels in upper and lower graphene layers are set as 0 and 0.8 eV, respectively. By flexibly shifting between the broadband and the double narrowband, the proposed absorber can be used as an either–or band selector, corresponding optional bandwidth from 2.05 to 2.35 THz, and 3.25 to 3.6 THz. Furthermore, single narrowband absorption can be achieved by setting the conductivity of the VO2 film to appropriate values. The proposed absorber can be used in the THz regime in applications such as multifunctional devices, switches, cloaking objects, and band selectors.

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A plasmonic terahertz perfect absorber based on L-shaped graphene patches and gold rods

Cited by 3 publications

References 86 publications

Sensor and slow light based on plasmon-induced transparency in carbon nanotube rectangular split-ring resonator metamaterials

Sensor and slow light based on plasmon-induced transparency in carbon nanotube rectangular split-ring resonator metamaterials

A Metamaterials-Based Absorber Used for Switch Applications with Dynamically Variable Bandwidth in Terahertz Regime

Graphene and Vanadium Dioxide-Based Terahertz Absorber with Switchable Multifunctionality for Band Selection Applications

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