Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11851/7491
Title: Spoof Surface Plasmon Polariton Delay Lines for Terahertz Phase Shifters
Authors: Unutmaz, Muhammed Abdullah
Ünlü, Mehmet
Keywords: Hafnium
Delay lines
phase shifters
single conductor waveguides
spoof surface plasmon polaritons
terahertz
Issue Date: 2021
Publisher: IEEE-Inst Electrical Electronics Engineers Inc
Abstract: The terahertz gap attracted interest of researchers with its captivating properties such as its potential for ultrawideband communication and high-resolution imaging applications, which require robust and efficient terahertz components and circuits. Terahertz spoof surface plasmon polaritons are perfect alternatives to implement terahertz integrated circuits. We present the first-time demonstration of the terahertz spoof surface plasmon polariton delay lines for terahertz phase shifters, which present an unprecedented insertion phase versus loss performance. The electrical lengths of the proposed delay lines are tuned just by changing the corrugation depths, which allows the designer to keep the physical length of the delay lines constant. In order to verify the proposed idea, four different delay lines having the same length of 1052.5 mu m are designed, where the electrical lengths of the delay lines are selected to represent the four different phase states of a 2-bit phase shifter. The measurement results of the fabricated terahertz delay lines show almost perfect phase accuracy and very good agreement with the simulations, having an ultra-low average phase error of 0.6%, and average insertion and return losses of -2.3 and -18 dB, respectively. These measurements result in, to the best of our knowledge, a record-high figure-of-merit of 90 degrees/dB compared to all other kinds of planar waveguides at 0.3 THz. The proposed delay lines emerge as a very high-performance and promising candidate for all the waveguide-based components that are crucial for the terahertz integrated circuits.
URI: https://doi.org/10.1109/JLT.2021.3059416
https://hdl.handle.net/20.500.11851/7491
ISSN: 0733-8724
1558-2213
Appears in Collections:Elektrik ve Elektronik Mühendisliği Bölümü / Department of Electrical & Electronics Engineering
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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