Study on a tunable narrow-band filter based on magnetic defects in photonic crystal in the terahertz region

被引：7
|
作者：
Zhang, Hui [1 ]
Xu, Xian-feng [1 ]
Fan, Fei [2 ]
Chang, Sheng-jiang [2 ]
机构：
[1] China Univ Petr East China, Coll Sci, Dept Phys & Optoelect Engn, Qingdao 266580, Peoples R China
[2] Nankai Univ, Inst Modern Opt, Tianjin 300071, Peoples R China
来源：
OPTICAL ENGINEERING | 2015年 / 54卷 / 04期
基金：
中国国家自然科学基金;
关键词：
terahertz narrow-band filter; ferrite defect in photonic crystal; finite difference time domain method; FLUORESCENCE; MODULATOR; ULTRAFAST; SILICON; SWITCH; GASES;
D O I：
10.1117/1.OE.54.4.047104
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A narrow-band filter with a broad tuning range is designed based on a magnetic field controlled ferrite defect in photonic crystal for a terahertz (THz) wave. The resonance defect modes of a ferrite defect in photonic crystal in the THz region are studied by using the finite difference time domain method. Detailed calculations on the shifts of the defect mode frequency and transmission properties reveal that the peak frequency of transmission spectra can continuously vary from 0.77 to 0.95 THz under the external magnetic field and the bandwidth of the filter is about 0.015 THz. (C) 2015 Society of Photo-Optical Instrumentation Engineers (SPIE)
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页数：5
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