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Research Article | Open Access | Just Accepted

Dielectric response of ANb2O6 (A = Zn, Co, Mn, Ni) columbite niobates: From microwave to terahertz

Weijia LuoaShun WangaSiyong ZhengaJining Lib( )Menglong WangcYongzheng WenaLingxia Lid( )Ji Zhoua( )

a State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China

b Institute of Laser and Optoelectronics, School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China

c Shandong Inspur Artificial Intelligence Research Institute Company Limited, Jinan 250013, China

d School of Microelectronics, Tianjin University, Tianjin 300072, China

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Abstract

In the upcoming 6-generation (6G) revolution, the achievement of low power consumption has become a key objective in research concerning terahertz devices. As an important component of passive devices, there are very few low-loss dielectric ceramics in the terahertz range. To elucidate the mechanism of loss and promote the application of microwave dielectric ceramics for the future 6G technology (covering microwave and terahertz frequencies), the terahertz responses of ANb2O6 (A = Zn, Co, Mn, Ni) columbite niobates were studied. The influences of magnetic loss on the Qf values in the microwave range with different transition metal ions in the A-site were reasonably analyzed. Moreover, due to the weakened magnetic relaxation properties in the terahertz range, the samples all exhibited low loss and approximately transparency, especially MnNb2O6 and NiNb2O6 (tanδ < 0.01 and absorption coefficient < 10 cm-1 below 1.2 THz), which subverted the definition of traditional low-loss microwave dielectric ceramics. Ultimately, based on Mie theory, we designed a prototypical broadband metamaterial reflector to validate the applicability of the ANb2O6 system in the terahertz band, which is highly important for the development of terahertz ceramic-based passive devices.

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Journal of Advanced Ceramics
Cite this article:
Luo W, Wang S, Zheng S, et al. Dielectric response of ANb2O6 (A = Zn, Co, Mn, Ni) columbite niobates: From microwave to terahertz. Journal of Advanced Ceramics, 2024, https://doi.org/10.26599/JAC.2024.9220928

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Received: 26 March 2024
Revised: 10 June 2024
Accepted: 11 June 2024
Available online: 12 June 2024

© The author(s) 2024

The articles published in this open access journal are distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/).

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