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Simulation and analysis of microring electric field sensor based on a lithium niobate-on-insulator

Wu, Zhenlin, Lin, Yumeng, Han, Shaoshuai, Yin, Xiong, Ding, Menghan, Guo, Lei, Yang, Xin and Zhao, Mingshan 2021. Simulation and analysis of microring electric field sensor based on a lithium niobate-on-insulator. Crystals 11 (4) , 359-.. 10.3390/cryst11040359

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Abstract

With the increasing sensitivity and accuracy of contemporary high-performance electronic information systems to electromagnetic energy, they are also very vulnerable to be damaged by high-energy electromagnetic fields. In this work, an all-dielectric electromagnetic field sensor is proposed based on a microring resonator structure. The sensor is designed to work at 35 GHz RF field using a lithium niobate-on-insulator (LNOI) material system. The 2.5-D variational finite difference time domain (varFDTD) and finite difference eigenmode (FDE) methods are utilized to analyze the single-mode condition, bending loss, as well as the transmission loss to achieve optimized waveguide dimensions. In order to obtain higher sensitivity, the quality factor (Q-factor) of the microring resonator is optimized to be 106 with the total ring circumference of 3766.59 μm. The lithium niobate layer is adopted in z-cut direction to utilize TM mode in the proposed all-dielectric electric field sensor, and with the help of the periodically poled lithium niobate (PPLN) technology, the electro-optic (EO) tunability of the device is enhanced to 48 pm·μm/V.

Item Type: Article
Date Type: Published Online
Status: Published
Schools: Engineering
Publisher: MDPI
ISSN: 2073-4352
Date of First Compliant Deposit: 8 April 2021
Date of Acceptance: 26 March 2021
Last Modified: 09 Apr 2021 09:55
URI: https://orca.cardiff.ac.uk/id/eprint/140397

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