Tracing Group & Phase Velocities of THz Surface Plasmon Polaritons in Graphene by Near-field Spacetime Imaging

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This is a Experimental Study study.

Simon Anglhuber; Martin Zizlsperger; Eva A. A. Pogna; Yaroslav A. Gerasimenko; Anastasios D. Koulouklidis; Imke Gronwald; Svenja Nerreter; Leonardo Viti; Miriam S. Vitiello; R. Huber; Markus A. Huber

doi:10.1364/cleo_fs.2025.ff127_3

January 1, 2025

Tracing Group & Phase Velocities of THz Surface Plasmon Polaritons in Graphene by Near-field Spacetime Imaging

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Key Points

Group and phase velocities of terahertz surface plasmons in graphene were effectively traced using advanced imaging techniques.
The technique enabled subcycle mapping, showing precise control of non-equilibrium polariton dynamics and their damping.
Femtosecond optical excitation provided control over polariton propagation, allowing researchers to directly observe dynamic behaviors.
The findings suggest potential applications for advanced terahertz devices and improved understanding of plasmonic materials.

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Implication

Field-resolved imaging reveals insights on polariton dynamics in graphene, indicating specific group and phase velocities.

Abstract

Field-resolved subcycle terahertz near-field microscopy enables direct spatiotemporal mapping of polariton dynamics in graphene, yielding group and phase velocities as well as damping. Femtosecond control of non-equilibrium polariton propagation is achieved by optical excitation.

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Anglhuber et al. (2025) studied this question.

synapsesocial.com/papers/68d463f131b076d99fa6394d https://doi.org/10.1364/cleo_fs.2025.ff127_3

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Tracing Group & Phase Velocities of THz Surface Plasmon Polaritons in Graphene by Near-field Spacetime Imaging

Key Points

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Implication

Abstract

Discussion

Cite This Study

Tracing Group & Phase Velocities of THz Surface Plasmon Polaritons in Graphene by Near-field Spacetime Imaging

Key Points

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Implication

Abstract

Discussion

Cite This Study

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