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PIER PIER B PIER C PIER M PIER Letters
2011-08-18
Terahertz Metamaterial Modulators Based on Absorption
By
Hao Zhou,

    Dr. Hao Zhou

    Zhejiang University

    China

    Homepage

Fei Ding,

    Prof. Fei Ding

    Centre for Nano Optics

    University of Southern Denmark

    Denmark

    Homepage

Yi Jin,

    Dr. Yi Jin

    Centre for Optical and Electromagnetic Research

    Zhejiang University

    China

    Homepage

Sailing He

    Prof. Sailing He

    Department of Electromagnetic Theory

    Royal Institute of Technology

    Sweden

    Homepage

Progress In Electromagnetics Research, Vol. 119, 449-460, 2011
doi:10.2528/PIER11061304
Abstract
Metamaterial absorbers can perfectly absorb an incident wave in a narrow frequency band. In this paper, metamaterial absorbers are used to construct a terahertz modulator. By controlling the carrier density in the n-doped semiconductor spacer between a patterned metallic superstructure and a metallic ground with different applied voltage bias, the absorption varies sensitively, and the reflected wave amplitude acting as the modulated signal can be strongly modulated. Two types of modulators are investigated, one of which possesses an array of metallic crosses as the superstructure, and the other has a complementary superstructure. Compared with the former, the latter may give a better modulation performance.
Citation
Hao Zhou, Fei Ding, Yi Jin, and Sailing He, "Terahertz Metamaterial Modulators Based on Absorption," Progress In Electromagnetics Research, Vol. 119, 449-460, 2011.
doi:10.2528/PIER11061304
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