Dynamic manipulation of strongly confined terahertz surface waves on meta-surfaces, Goubau lines and wire pairs
Final Report Abstract
In this project, a polarization-sensitive, imaging terahertz near-field time-domain spectroscope with subwavelength spatial resolution has been built, which allows the experimental study of the temporal dynamics of the spatio-spectral properties of spoof surface plasmon polaritons on meta-surfaces and Goubau lines, as well as hybrid systems of both, at high field strengths. Similarly, the dynamics of surface polaritons in actively tunable systems can be studied. For example, both directionally and frequency selective couplers for spoof surface plasmon polaritons have been implemented in the project and these have been studied in terms of their spatial-spectral dynamics during propagation. As further exemplary studies, spatio-spectral propagation properties of surface polaritons on metasurface paths with widths in the subwavelength range were investigated in detail with respect to their applicability as a plasmonic terahertz network and the potential for use in sensor technology was evaluated. In addition, meta-surfaces with hyperbolic dispersion relation were designed and fabricated, on which nearly diffraction-free propagation and targeted deflection of terahertz spoof surface plasmon polaritons is possible.
Publications
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Metasurface pathways for surface guiding of confined terahertz spoof surface plasmon polaritons on routes with subwavelength width. 2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 1-2. IEEE.
Becker, S.; Fip, T. & Rahm, M.
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Routing of strongly confined terahertz spoof surface plasmon polaritons on metasurfaces along straight and curved pathways with subwavelength width. Optics Express, 28(5), 6766.
Becker, Sven; Fip, Tassilo & Rahm, Marco
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Patch antenna arrays for efficient coupling of terahertz spoof surface plasmon polaritons to free space modes and for substance monitoring. Conference on Lasers and Electro-Optics, STh2C.3. Optica Publishing Group.
Becker, Sven & Rahm, Marco
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“On-chip guiding of spoof terahertz surface plasmon polaritons on metasurface pathways,” The 11th International Conference on Metamaterials, Photonic Crystals and Plasmonics (META ’21), Warsaw (Poland), July 20-23, 2021 (Invited Talk).
S. Becker, T. Fip & M. Rahm
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Diffraction-free propagation of terahertz spoof surface plasmon polaritons on metasurfaces with hyperbolic dispersion. Conference on Lasers and Electro-Optics, SW4G.5. Optica Publishing Group.
Becker, Sven; Walla, Frederik; Roskos, Hartmut G. & Rahm, Marco
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Propagation-invariant channels on terahertz metasurfaces with hyperbolic dispersion. 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), 1-2. IEEE.
Becker, S.; Klingel, S.; Walla, F.; Roskos, H. & Rahm, M.
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Spoof terahertz surface plasmon polaritons on metasurface pathways and networks. Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XV, 32. SPIE.
Becker, Sven; Fip, Tassilo & Rahm, Marco
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“Dispersion-engineered metasurfaces for spoof surface plasmon polaritons at terahertz frequencies,” SPIE Photonics Europe 2022, Strasbourg (France)), April 3-7, 2022 (Invited Talk).
S. Becker, T. Fip & M. Rahm
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“Spoof terahertz surface plasmon polaritons on metasurface pathways for network and sensing applications,” American Association for Advances in Functional Materials/Materials for Life 2023, Los Angeles (USA), Aug 10-12, 2023 (Invited Talk).
S. Becker, T. Fip & M. Rahm
