Spoof Surface Plasmon Polariton Delay Lines for Terahertz Phase Shifters

Unutmaz, Muhammed Abdullah; Ünlü, Mehmet

doi:10.1109/jlt.2021.3059416

Cited by 15 publications

(1 citation statement)

References 48 publications

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“…Mehmet Unlu et al demonstrated delay lines based on sSPP waveguide which have various phase differences by designing different corrugation depths for the microwave and terahertz range. 10,11) However, these delay lines do not allow tuning the corrugation depths on one device by using switches for the realization of a phase shifter or modulator in the microwave range.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and characterization of delay lines with spoof surface plasmon polariton waveguide coupled with C-shaped metamaterials for microwave integrated circuits

Nguyen,

Kikuchi,

Kodama

et al. 2024

Jpn. J. Appl. Phys.

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Here, we proposed two delay lines consisting of spoof Surface Plasmon Polariton (sSPP) waveguides and C-shaped metamaterials (C-MMs). The delay lines, namely OFF and ON devices, were designed and fabricated. On the OFF device, an sSPP waveguide is capacitively coupled to the C-MMs via an air gap on a high-resistivity silicon substrate. On the ON device, a connection is established between the C-MMs and the sSPP waveguide by metal connectors. The difference in the electrical properties in the coupling between the C-MMs and the sSPP waveguide creates a large phase contrast between the ON and OFF delay lines. The structural design was performed using a numerical calculation based on a commercial finite element solver. We successfully fabricated and characterized delay lines with phase differences equal to tens of degrees between the ON and OFF devices in the target frequency range of 2-6 GHz, while maintaining the original transmittance properties. The promising applications of the delay lines are a phase shifter or modulator when integrating with suitable switches.

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Section: Introductionmentioning

confidence: 99%