Tunable terahertz graphene metamaterial optical switches and sensors based on plasma-induced transparency

Zhu, Jun; Xiong, Jiayuan

doi:10.1016/j.measurement.2023.113302

Cited by 31 publications

(1 citation statement)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In order to prove the sensing performance of PIT structure in terahertz sensing applications, the sensitivity parameters of PIT at 1.2 eV Fermi level are discussed in detail. The sensitivity is expressed as = D D S f n(THz/ Bright-bright and bright-dark Three-frequency 81.40% (maximum) - [46] Bright-bright and bright-dark Single-frequency 95.60% 0.315 [47] Bright-dark Four-frequency 94.30% (maximum) 10.90% (minimum) [48] Bright-bright Eight-frequency, six-frequency 87.50% (maximum) 6.95 (minimum) Our work Bright-bright Five-frequency, four-frequency, threefrequency 96% (maximum) 0.01 (minimum)…”

Section: Sensing Partmentioning

confidence: 99%

Multi-channel switch and sensing applications based on multilayered annular graphene metamaterials at terahertz frequency

Yu,

Cui,

Wen

et al. 2024

Phys. Scr.

View full text Add to dashboard Cite

In this study, a novel silica-graphene-silica periodic graphene structure consisting of six graphene semi-rings is proposed. The structure is based on a three-layer graphene metamaterial with a semicircular ring that achieves a tunable double plasmon-induced transparency (PIT) effect. In the proposed structure, the double-PIT window can be switched simultaneously at multiple frequencies through the dynamic tunability of graphene. Besides, the sensitivities of the refractive index for the PIT windows are investigated with the maximum values of 1.42 THz/RIU and 1.09 THz/RIU, respectively, indicating the structure’s performance as a terahertz sensor. Overall, it shows the potential of PIT effect in graphene metamaterials in controlling electromagnetic field responses. It has made positive contributions to the development of terahertz technology and related fields.

show abstract

Section: Sensing Partmentioning

confidence: 99%

Multi-channel switch and sensing applications based on multilayered annular graphene metamaterials at terahertz frequency

Yu,

Cui,

Wen

et al. 2024

Phys. Scr.

View full text Add to dashboard Cite

show abstract

A Terahertz Metamaterial Sensor Based on Dual Resonant Mode and Enhancement of Sensing Performance

Guo,

Li,

Wang

et al. 2023

Plasmonics

View full text Add to dashboard Cite

Dynamic Tunable Liquid-Core Photonic Crystal Fiber Sensor Based on Graphene Plasmon

Luo,

Abbasi,

et al. 2024

Plasmonics

View full text Add to dashboard Cite

The combination of photonic crystal fiber (PCF) and graphene-supporting surface plasmon polaritons (SPP) presents a new approach to achieving a plasmonic sensor with adjustable properties in the terahertz (THz) frequency range. In this study, we investigate a liquid-core PCF-based graphene plasmonic sensor, where the analyte to be detected is located on both the sensing layer surface and the fiber core. As a result, the dispersion relations of both graphene plasmon (GP) and core-guide mode can be influenced by the analyte, leading to a negative refractive index (RI) wavelength sensitivity. This unique performance is attributed to the higher modulation degree of the core mode on the analyte RI (Δneff.core) compared to that of the GP mode (Δneff.GP). By reducing the graphene Fermi energy, a positive sensibility is achieved with the modulation relationship of Δneff.core < Δneff.GP. Subsequently, the geometry dependence is explored to optimize the sensing capabilities. Furthermore, we demonstrate the sensor’s tunability by dynamically varying the graphene Fermi energy (Ef). By adjusting the Ef from 0.6 to 0.9 eV, the detection range can be artificially shifted from 0.554–0.574 THz to 0.686–0.724 THz, obtaining a tunability of 0.44 THz/eV and a higher sensitivity of 1.2667 THz/RIU. This design facilitates the efficient utilization of the limited bandwidth to detect various RIs and provides a flexible approach to constructing multiple sensing channels. To the best of our knowledge, this is the first report of graphene plasmonic sensing based on core-filled PCF in the THz frequency range. The novel analysis method of modulation degree and dispersion matching has the potential to be widely applied in THz plasmonic sensing and could lead to various nanoscience applications.

show abstract

Tunable terahertz graphene metamaterial optical switches and sensors based on plasma-induced transparency

Cited by 31 publications

References 50 publications

Multi-channel switch and sensing applications based on multilayered annular graphene metamaterials at terahertz frequency

Multi-channel switch and sensing applications based on multilayered annular graphene metamaterials at terahertz frequency

A Terahertz Metamaterial Sensor Based on Dual Resonant Mode and Enhancement of Sensing Performance

Dynamic Tunable Liquid-Core Photonic Crystal Fiber Sensor Based on Graphene Plasmon

Contact Info

Product

Resources

About