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9 November 2018 A new regular hexagonal THz wave modulator based on metamaterials and vanadium oxide phase-change materials
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Abstract
In this paper, a novel terahertz modulator using the phase transition characteristics of vanadium dioxide to achieve both band-pass and band-stop filter states is proposed. The regular hexagonal split-ring is used as a unit structure, and the center frequency can be changed by changing the size of the regular hexagon. The simulation results show that any frequency between 0.1~1THz can be used as its center frequency. In the case of 140 um regular hexagon cell, the band-pass filter state shows that the -3dB bandwidth reaches to 100 GHz, and the band-stop filter state shows that the -20dB bandwidth reaches to 75 GHz. Furthermore, a mirror-type regular hexagonal structure is designed as unit cell, which can improve the modulator performance in both states.
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Jinhua Jin, Wei Wang, Zhe Chen, Zhenhua Du, and Zhaoxiang Guo "A new regular hexagonal THz wave modulator based on metamaterials and vanadium oxide phase-change materials", Proc. SPIE 10826, Infrared, Millimeter-Wave, and Terahertz Technologies V, 108261B (9 November 2018); https://doi.org/10.1117/12.2501197
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