Terahertz Plasmons in Periodic Structures of Epitaxial Graphene
2023 48th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)(2023)
Abstract
THz surface plasmon excitation and the ultrafast-light induced plasmon dynamics have been studied in lithographically prepared nanoribbons of epitaxial graphene via combined near-and far-field THz spectroscopic probes. The measured nonlinear dynamics of plasmons are entirely controlled by the chemical potential of laser-excited hot carriers through their temperature. Indeed, the transient spectra on subpicosecond(ps) to hundred ps timescale are described by a two-temperature Drude-Lorentz model revealing the ultrafast evolution of the chemical potential.
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Key words
C/el,chemical potential,Drude-Lorentz model,epitaxial graphene,far-field terahertz spectroscopy,laser-excited hot carriers,nanoribbons,near-field terahertz spectroscopy,nonlinear dynamics,periodic structures,terahertz surface plasmon excitation,transient spectra,ultrafast-light induced plasmon dynamics
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