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7 May 2023

10 Pages

Band Broadening of Terahertz Photonic Crystals Circulator Using Two Symmetrical Hexagonal Aluminum Sheets

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1
College of Microelectronics, Shenzhen Institute of Information Technology, Shenzhen 518060, China
2
College of Electronics and Information Technology, Shenzhen University, Shenzhen 518060, China
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Shenzhen Research Institute, Xidian University, Shenzhen 518060, China
*
Author to whom correspondence should be addressed.
Crystals2023, 13(5), 779;https://doi.org/10.3390/cryst13050779
This article belongs to the Special Issue Advances in Photonic Crystals and Devices
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Abstract

Future 6G communication systems will require wideband nonreciprocal devices in the terahertz frequency domain. A novel ultra-wideband terahertz circulator is implemented by inserting a NixZn1−xFe2O4 ferrite sphere into the Al2O3 dielectric rod-array. The operating bandwidth of the circulator is broadened to 40 GHz via the external matching method through two hexagonal aluminum sheets. The three-dimensional numerical simulation suggests that the designed circulator also has an excellent insertion loss and isolation of 49.37 dB and 0.56 dB, respectively, via the finite element method. The low loss, high isolation and ultra-wideband show that the proposed scheme provides an effective path for realizing high-performance THz devices.

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