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

Kangwen Li | Zendy; Xunpeng Ma | Zendy; Zuyin Zhang | Zendy; Lina Wang | Zendy; Haifeng Hu | Zendy; Yun Xu | Zendy; Guofeng Song | Zendy

Open Access

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

Author(s) -

Kangwen Li,

Xunpeng Ma,

Zuyin Zhang,

Lina Wang,

Haifeng Hu,

Yun Xu,

Guofeng Song

Publication year - 2013

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4812703

Subject(s) - terahertz radiation , materials science , grating , optics , semiconductor , fiber bragg grating , waveguide , optoelectronics , magnetic field , insulator (electricity) , optical filter , filter (signal processing) , wavelength , physics , quantum mechanics , computer science , computer vision

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

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