文献类型：会议论文

英文题名：Studies on electromagnetic response in arc-shaped structures in terahertz region

作者：Shi, Lan[1]; Zhou, Qingli[1]; Sun, Huijuan[2,3]; Li, Chenyu[1]; Liu, Changxiang[1]; Zhang, Cunlin[1]

第一作者：Shi, Lan

机构：[1] Beijing Key Laboratory for Terahertz Spectroscopy and Imaging, Key Laboratory of Terahertz Optoelectronics, Ministry of Education, Department of Physics, Capital Normal University, Beijing, 100048, China; [2] Basic Course Department, Beijing Union University, Beijing, 100101, China; [3] School of Optoelectronics, Beijing Institute of Technology, Beijing, 100081, China

第一机构：Beijing Key Laboratory for Terahertz Spectroscopy and Imaging, Key Laboratory of Terahertz Optoelectronics, Ministry of Education, Department of Physics, Capital Normal University, Beijing, 100048, China

会议论文集：2017 International Conference on Optical Instruments and Technology: IRMMW-THz Technologies and Their Applications

会议日期：October 28, 2017 - October 30, 2017

会议地点：Beijing, China

语种：英文

外文关键词：Finite difference time domain method - Frequency response - Metamaterials - Natural frequencies - Optical instruments - Time domain analysis - Transmissions

摘要：In this paper, we use the finite-difference time-domain (FDTD) method to simulate and study the electromagnetic response characteristics of ring and arc-shaped resonators. Firstly, we study the terahertz transmission properties of two single-ring resonators with different radii. Either the single-ring resonator with a large radius or with a small radius only has one resonance in the transmission spectra. Then, we combine those resonators into a double-ring resonator structure. The results conclude that the two resonant frequencies of the double-ring resonator are caused by the simple superposition of the resonances of the large and small radius single-ring resonators, respectively. Additionally, on the basis of a single-ring resonator, we also study the influence of the symmetrical and asymmetric arc-shaped resonators on electromagnetic response characteristics. The ring resonator is split from the middle into two symmetrical arc-shaped resonators. As the width of the middle gap gradually increases, the resonant frequency shows blueshift and the intensity of the surface current distribution gradually weakens. Finally, the direction of the current is reversed. In order to further compare the relationship between the single-ring resonators and the double-ring resonators, we study the double arc-shaped resonators. The main purpose of this paper is to study the frequency response characteristics of the ring resonator in the terahertz band and to control the terahertz spectrum by changing the symmetry of the ring resonator. In the future, we can further study the coupling response between the ring structures and the multi-frequency response modulation of the multi-ring structures. ? COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.