TY - JOUR

T1 - Terahertz Surface Plasmon Refractometry of Composite Graphene Nanoparticle Films

AU - Gerasimov, Vasily V.

AU - Khasanov, Ildus Sh

AU - Kukotenko, Valeria D.

AU - Lemzyakov, Alexey G.

AU - Ivanov, Artem I.

AU - Antonova, Irina V.

AU - Cherevko, Aleksandr G.

N1 - The study was supported in part by the Ministry of Science and Higher Education of the Russian Federation under State contracts No. FFNS-2022-0009, FWGW-2022-0014 and state assignments No. 071-03-2023-001 (dated January 19, 2023) and No. 121-05260-00-74-4.

PY - 2025/1

Y1 - 2025/1

N2 - Graphene is one of the most promising materials for terahertz (THz) plasmonics. Composite layers composed of graphene nanoparticles are easier to fabricate, and their composition variability allows for customization of desired optical surface characteristics. This study is the first to apply THz surface plasmon refractometry methods to investigate composite films of graphene nanoparticles (with PEDOT:PSS additive) with thicknesses of 35 and 400 nm. The Novosibirsk Free-Electron Laser (NovoFEL), generating monochromatic wavelength-tunable coherent radiation, was used as a THz radiation source. The measurement of the effective dielectric permittivity of the layers at wavelengths of 141 and 197 μm indicated their good conductive properties. Results of comparison of permittivity for different thicknesses of graphene layers have revealed a complex mechanism of conductivity of the composite material, which differs significantly from the Drude model estimations. So, further thorough experimental research of this material is required. The main results suggest the potential application of composite graphene films hundreds of nanometers thick in plasmonic integrated circuits and THz frequency range communication lines.

AB - Graphene is one of the most promising materials for terahertz (THz) plasmonics. Composite layers composed of graphene nanoparticles are easier to fabricate, and their composition variability allows for customization of desired optical surface characteristics. This study is the first to apply THz surface plasmon refractometry methods to investigate composite films of graphene nanoparticles (with PEDOT:PSS additive) with thicknesses of 35 and 400 nm. The Novosibirsk Free-Electron Laser (NovoFEL), generating monochromatic wavelength-tunable coherent radiation, was used as a THz radiation source. The measurement of the effective dielectric permittivity of the layers at wavelengths of 141 and 197 μm indicated their good conductive properties. Results of comparison of permittivity for different thicknesses of graphene layers have revealed a complex mechanism of conductivity of the composite material, which differs significantly from the Drude model estimations. So, further thorough experimental research of this material is required. The main results suggest the potential application of composite graphene films hundreds of nanometers thick in plasmonic integrated circuits and THz frequency range communication lines.

KW - 6G systems

KW - Conductivity

KW - Free-Electron Lasers

KW - Graphene Nanocomposites

KW - Interferometers

KW - Nanoparticles

KW - Plasmonic Integrated Circuits

KW - Surface Plasmon Polaritons

KW - Terahertz Radiation

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85207907241&origin=inward&txGid=79f941a62aec24e0112ccab52d4632b3

UR - https://elibrary.ru/item.asp?id=79716049

UR - https://www.mendeley.com/catalogue/c55a9014-ea96-3d93-bf42-a970c34ce30b/

U2 - 10.1109/TTHZ.2024.3485870

DO - 10.1109/TTHZ.2024.3485870

M3 - Article

VL - 15

SP - 61

EP - 68

JO - IEEE Transactions on Terahertz Science and Technology

JF - IEEE Transactions on Terahertz Science and Technology

SN - 2156-342X

IS - 1

ER -