Abstract
Given a constitutive relation of the bianisotropic medium, it is not trivial to study how light interacts with the photonic bianisotropic structure due to the limited available means of studying electromagnetic properties in bianisotropic media. In this paper, we study the electromagnetic properties of photonic bianisotropic structures using the finite element method. We prove that the vector wave equation with the presence of bianisotropic is self-adjoint under scalar inner product. we propose a balanced formulation of weak form in the practical implementation, which outperforms the standard formulation in finite element modeling. Furthermore, we benchmark our numerical results obtained from finite element simulation in three different scenarios. These are bianisotropy-dependent reflection and transmission of plane waves incident onto a bianisotropic slab, band structure of bianisotropic photonic crystals with valley-dependent phenomena, and the modal properties of bianisotropic ring resonators. The first two simulated results obtained from our modified weak form yield excellent agreements either with theoretical predictions or available data from the literature, and the modal properties in the last example, i.e., bianisotropic ring resonators as a polarization-dependent optical insulator, are also consistent with the theoretical analyses.
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Acknowledgements
The authors acknowledge the financial support from the National Key Research and Development Program of China (No. 2019YFB2203100) and the National Natural Science Foundation of China (Grant No. 11874026).
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Zhongfei Xiong received his B.S. degree in Optoelectronic Information Engineering from Huazhong University of Science and Technology, China. He is currently pursuing his Ph.D. degree in Optical Engineering at School of Optical and Electronic Information, Huazhong University of Science and Technology. His major research interests include topological photonics, symmetry in optics and thermodynamics optics.
Weijin Chen received his Bachelor degree from Harbin Institute of Technology, China, in 2015, and Ph.D. degree from Huazhong University of Science and Technology, China, in 2020. He is currently a Research Fellow in Department of Electrical and Computer Engineering (ECE), National University of Singapore, Singapore. Chen’s research focuses on the Mie scattering, scattering invariance, and coupledmode theory.
Zhuoran Wang is a research assistant in School of Optical and Electrical Information, Huazhong University of Science and Technology, China. He received the Master degree in Engineering from University of Science and Technology, China, in 2020. His research area involved computational electromagnetics, topological photonics, and Non-Hermition photonics. He proposed a new boundary condition, Non-Hermition port, so as to numerically calculate the S parameters of a Non-Hermition system. Besides, he used finite element method to calculate the eigenmodes of bianisotropic waveguide. Currently, he is focusing on developing an optical simulation software in order to replace the COMSOL, FDTD.
Jing Xu received her Ph.D. degree in Optical Engineering from Huazhong University of Science and Technology (HUST), China, in 2008. During 2009–2013, she has been a postdoctoral fellow at Technical University of Denmark (DTU), Denmark. From November 2013, Dr. Xu joined School of Optical and Electronic Information, HUST, as an associate professor. Since 2020, Dr. Xu become a full professor at HUST.
Yuntian Chen received his Ph.D. degree from Technical University of Denmark (DTU), Denmark, in 2010. During 2010–2013, he has been a postdoctoral fellow at Technical University of Denmark. From September 2013, Dr. Yuntian Chen joined School of Optical and Electronic Information in Huazhong University of Science and Technology, China, as an associate professor.
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Xiong, Z., Chen, W., Wang, Z. et al. Finite element modeling of electromagnetic properties in photonic bianisotropic structures. Front. Optoelectron. 14, 148–153 (2021). https://doi.org/10.1007/s12200-021-1213-5
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DOI: https://doi.org/10.1007/s12200-021-1213-5