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	A magnetically tunable non-Bragg defect mode in a corrugated waveguide filled with liquid crystals
	Zhang, Lu1,2; Fan, Ya-Xian1; Liu, Huan1; Han, Xu1,3; Lu, Wen-Qiang3; Tao, Zhi-Yong1,2
	2018-04-12
摘要	A magnetically tunable, non-Bragg defect mode (NBDM) was created in the terahertz frequency range by inserting a defect in the middle of a periodically corrugated waveguide filled with liquid crystals (LCs). In the periodic waveguide, non-Bragg gaps beyond the Bragg ones, which appear in the transmission spectra, are created by different transverse mode resonances. The transmission spectra of the waveguide containing a defect showed that a defect mode was present inside the non-Bragg gap. The NBDM has quite different features compared to the Bragg defect mode, which includes more complex, high-order guided wave modes. In our study, we filled the corrugated waveguide with LCs to realize the tunability of the NBDM. The simulated results showed that the NBDM in a corrugated waveguide filled with LCs can be used in filters, sensors, switches, and other terahertz integrated devices. (C) 2018 Elsevier B.V. All rights reserved.
关键词	Magnetic tunability Transverse modes Mode interactions Frequency manipulation
DOI	10.1016/j.physleta.2018.02.017
发表期刊	PHYSICS LETTERS A
ISSN	0375-9601
卷号	382期号:14页码:1000-1005
收录类别	SCI
WOS记录号	WOS:000427669100013
语种	英语