Mode coupling in a terahertz multi-mode whispering-gallery-mode resonator

被引：11
|
作者：
Yuan, Shixing [1 ,2 ]
Chen, Liao [1 ,2 ]
Wang, Ziwei [1 ,2 ]
Wang, Ruolan [1 ,2 ]
Wu, Xiaojun [3 ]
Zhang, Xinliang [1 ,2 ]
机构：
[1] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Hubei, Peoples R China
[2] Huazhong Univ Sci & Technol, Sch Opt & Elect Informat, Wuhan 430074, Hubei, Peoples R China
[3] Beihang Univ, Sch Elect & Informat Engn, Beijing 100191, Peoples R China
来源：
OPTICS LETTERS | 2019年 / 44卷 / 08期
关键词：
D O I：
10.1364/OL.44.002020
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We investigate mode-coupling effects of terahertz whispering-gallery modes (WGMs) in a multi-mode resonator using an extended transfer matrix method. Coupling effects between two WGMs are successfully observed on a well-designed high-Q terahertz Teflon ring resonator that supports low-order WGMs. The extended transmission matrix method is adopted to model, analyze, and reproduce terahertz single-band resonance and asymmetric dual-band resonances caused by mode coupling. Moreover, the terahertz splitting effect based on coupling of two modes in a multi-mode resonator is theoretically illustrated. This detailed analysis not only contributes to understanding physical phenomena, such as mode splitting, but also helps in identifying parameters when designing terahertz devices, such as dual-band filters. (C) 2019 Optical Society of America
引用
收藏
页码：2020 / 2023
页数：4
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