Active metal–graphene hybrid terahertz surface plasmon polaritons

Feng, Mengmeng; Zhang, Baoqing; Ling, Haotian; Zhang, Zihao; Wang, Yiming; Wang, Yilin; Zhang, Xijian; Hua, Ping-Rang; Wang, Qingpu; Song, Aimin; Zhang, Yifei

doi:10.1515/nanoph-2022-0189

Cited by 16 publications

(4 citation statements)

References 30 publications

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“…Finally, spin-coat an ion gel on the surface and annealing to form a thin ion gel layer. A top gate can be fabricated on the ion gel layer to tune the graphene Fermi levels [46][47][48][49].…”

Section: Resultsmentioning

confidence: 99%

Graphene metamaterial-based broadband/dual-narrowband switchable terahertz absorber with adjustable absorptivity and large phase shift

Ma,

Jiang,

Song

et al. 2023

Phys. Scr.

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We present a graphene metamaterial-based broadband/dual-narrowband switchable terahertz (THz) absorber with adjustable absorptivity and large phase shift. From top to bottom of the device, there are graphene-metal hybrid pattern, silicon dioxide layer, silicon layer and metal substrate. When the Fermi energy (EF) of graphene is equal to 0 eV, it has two narrowband absorption peaks at frequencies of 1.88 THz and 2.54 THz, respectively. However, when the EF is equal to 0.8 eV, it turns to a broadband absorber in the frequency range from 1.60 to 2.42 THz. Moreover, if the EF increases from 0.2 eV to 0.8 eV, its absorptivity can be dynamically adjusted from 60% to more than 90% in a broadband of 0.82 THz. Most importantly, the absorber can also dynamically control the phase shift. In the frequency range of 2.04 THz to 2.34 THz, a maximum dynamic phase shift of 192 degrees is achieved by changing the EF of graphene. This work provides an alternative method for constructing multifunctional integrated THz devices based on graphene metamaterial.

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Section: Resultsmentioning

confidence: 99%

Graphene metamaterial-based broadband/dual-narrowband switchable terahertz absorber with adjustable absorptivity and large phase shift

Ma,

Jiang,

Song

et al. 2023

Phys. Scr.

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“…On the other hand, the different signals can be harvested and focused into spatial regions smaller than the wavelength, and thus be readily coupled into on-chip waveguides for post-processing and intrachip/interchip communication. In addition, the field enhancements of THz plasmonic waves can boost the light–matter interaction and thus enhance on-chip detection [388,389] and modulation [390–394] of THz signals.…”

Section: Discussionmentioning

confidence: 99%

Meta-optics inspired surface plasmon devices

Lang

Jiang

et al. 2023

Photonics Insights

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Surface plasmons (SPs) are electromagnetic surface waves that propagate at the interface between a conductor and a dielectric. Due to their unique ability to concentrate light on two-dimensional platforms and produce very high local-field intensity, SPs have rapidly fueled a variety of fundamental advances and practical applications. In parallel, the development of metamaterials and metasurfaces has rapidly revolutionized the design concepts of traditional optical devices, fostering the exciting field of meta-optics. This review focuses on recent progress of meta-optics inspired SP devices, which are implemented by the careful design of subwavelength structures and the arrangement of their spatial distributions. Devices of general interest, including coupling devices, on-chip tailoring devices, and decoupling devices, as well as nascent SP applications empowered by sophisticated usage of meta-optics, are introduced and discussed.

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“…where 𝑊𝑊 𝑠𝑠𝑠𝑠𝑠𝑠1 is the width of the groove, 𝑃𝑃 𝑠𝑠𝑠𝑠𝑠𝑠 is the period of the grooves, 𝐿𝐿 𝑠𝑠𝑠𝑠𝑠𝑠 is the groove length, ℰ 𝑒𝑒𝑒𝑒𝑒𝑒 is the effective permittivity for metal grooves [26]. The cut-off frequency of SSPPs can be obtained by…”

Section: Design and Simulationmentioning

confidence: 99%

Narrowband SIW-SSPP Hybrid Bandpass Filter With Compact Profile at Ka-Band

Zhang,

Li,

Wang

et al. 2023

IEEE Access

Self Cite

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In this paper, a narrowband bandpass filter comprising substrate integrated waveguide (SIW) and spoof surface plasmon polaritons (SSPPs) is proposed, achieving miniaturization and low insertion loss at Ka-band. SIWs and SSPPs exhibit low and high cut-off responses, respectively, which can be combined for filtering functionalities. By designing I-shaped SSPP structures with large effective length, the cut-off frequencies of SIW and SSPPs can be tailed to converge at certain frequency for narrowband filter, where the SIW mode functions as a quasi-evanescent mode, and the mode impedance ramps fast. A sharp funnelshaped transition is designed to connect SIW with large impedance and 50-Ω microstrip line for low insertion loss and compact profile. In addition, no transitional SSPP structures are desired in the proposed devices, which further shortens the profile dimension. To verify our design, a hybrid filter at 30 GHz is fabricated and characterized. The measured insertion loss is as low as 1.5 dB, the 3-dB bandwidth is as narrow as 3%, which shows good consistency with the simulation. The proposed SIW-SSPP device has a low profile of 0.70λ × 0.38 λ and may find important applications in frequency division multiplexing.INDEX TERMS Bandpass filter, miniaturization, narrowband, substrate integrated waveguide (SIW), spoof surface plasmon polariton (SSPP).

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Active metal–graphene hybrid terahertz surface plasmon polaritons

Cited by 16 publications

References 30 publications

Graphene metamaterial-based broadband/dual-narrowband switchable terahertz absorber with adjustable absorptivity and large phase shift

Graphene metamaterial-based broadband/dual-narrowband switchable terahertz absorber with adjustable absorptivity and large phase shift

Meta-optics inspired surface plasmon devices

Narrowband SIW-SSPP Hybrid Bandpass Filter With Compact Profile at Ka-Band

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