Highly tunable Terahertz filter with magneto-optical Bragg grating formed in semiconductor-insulator-semiconductor waveguides

A highly tunable terahertz (THz) filter with magneto-optical Bragg grating formed in semiconductor-insulator-semiconductor waveguides is proposed and demonstrated numerically by means of the Finite Element Method. The results reveal that a sharp peak with high Q-value presents in the band gap of Bra...

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Main Authors: Kangwen Li, Xunpeng Ma, Zuyin Zhang, Lina Wang, Haifeng Hu, Yun Xu, Guofeng Song
Format: Article
Language:English
Published: AIP Publishing LLC 2013-06-01
Series:AIP Advances
Online Access:http://link.aip.org/link/doi/10.1063/1.4812703
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spelling doaj-6a0f1f2ff2d245ea8efb3e3599ddb2a42020-11-24T20:52:22ZengAIP Publishing LLCAIP Advances2158-32262013-06-013606213006213010.1063/1.4812703Highly tunable Terahertz filter with magneto-optical Bragg grating formed in semiconductor-insulator-semiconductor waveguidesKangwen LiXunpeng MaZuyin ZhangLina WangHaifeng HuYun XuGuofeng SongA highly tunable terahertz (THz) filter with magneto-optical Bragg grating formed in semiconductor-insulator-semiconductor waveguides is proposed and demonstrated numerically by means of the Finite Element Method. The results reveal that a sharp peak with high Q-value presents in the band gap of Bragg grating waveguide with a defect, and the position of the sharp peak can be modified greatly by changing the intensity of the transverse magnetic field applied to the device. Compared to the situation without magnetic field applied, the shift of the filtered frequency (wavelength) reaches up to 36.1 GHz (11.4 μm) when 1 T magnetic field is applied. In addition, a simple model to predict the filtered frequency and an effective way to improve the Q-value of the filter are proposed by this paper.http://link.aip.org/link/doi/10.1063/1.4812703
collection DOAJ
language English
format Article
sources DOAJ
author Kangwen Li
Xunpeng Ma
Zuyin Zhang
Lina Wang
Haifeng Hu
Yun Xu
Guofeng Song
spellingShingle Kangwen Li
Xunpeng Ma
Zuyin Zhang
Lina Wang
Haifeng Hu
Yun Xu
Guofeng Song
Highly tunable Terahertz filter with magneto-optical Bragg grating formed in semiconductor-insulator-semiconductor waveguides
AIP Advances
author_facet Kangwen Li
Xunpeng Ma
Zuyin Zhang
Lina Wang
Haifeng Hu
Yun Xu
Guofeng Song
author_sort Kangwen Li
title Highly tunable Terahertz filter with magneto-optical Bragg grating formed in semiconductor-insulator-semiconductor waveguides
title_short Highly tunable Terahertz filter with magneto-optical Bragg grating formed in semiconductor-insulator-semiconductor waveguides
title_full Highly tunable Terahertz filter with magneto-optical Bragg grating formed in semiconductor-insulator-semiconductor waveguides
title_fullStr Highly tunable Terahertz filter with magneto-optical Bragg grating formed in semiconductor-insulator-semiconductor waveguides
title_full_unstemmed Highly tunable Terahertz filter with magneto-optical Bragg grating formed in semiconductor-insulator-semiconductor waveguides
title_sort highly tunable terahertz filter with magneto-optical bragg grating formed in semiconductor-insulator-semiconductor waveguides
publisher AIP Publishing LLC
series AIP Advances
issn 2158-3226
publishDate 2013-06-01
description A highly tunable terahertz (THz) filter with magneto-optical Bragg grating formed in semiconductor-insulator-semiconductor waveguides is proposed and demonstrated numerically by means of the Finite Element Method. The results reveal that a sharp peak with high Q-value presents in the band gap of Bragg grating waveguide with a defect, and the position of the sharp peak can be modified greatly by changing the intensity of the transverse magnetic field applied to the device. Compared to the situation without magnetic field applied, the shift of the filtered frequency (wavelength) reaches up to 36.1 GHz (11.4 μm) when 1 T magnetic field is applied. In addition, a simple model to predict the filtered frequency and an effective way to improve the Q-value of the filter are proposed by this paper.
url http://link.aip.org/link/doi/10.1063/1.4812703
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