A graphene-based magnetoplasmonic metasurface for actively tunable transmission and polarization rotation at terahertz frequencies
A graphene-based magnetoplasmonic metasurface for actively tunable transmission and polarization rotation at terahertz frequencies
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DOI：
10.1063/5.0006448
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发表时间：
2020-06
影响因子：
4
通讯作者：
P. Padmanabhan;S. Boubanga-Tombet;H. Fukidome;T. Otsuji;R. Prasankumar
中科院分区：
文献类型：
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作者：
P. Padmanabhan;S. Boubanga-Tombet;H. Fukidome;T. Otsuji;R. Prasankumar
基于太赫兹（THz）技术的兴起引起了人们对操纵THz辐射特性的方法的浓厚兴趣。在这封信中，我们通过实验证明了一种基于石墨烯微带的超颖表面，使我们能够定制和动态调整撞击太赫兹脉冲的透射和偏振旋转光谱。这是通过控制带状图案的几何形状和所施加的DC磁场来实现的，这两者都强烈地影响超颖表面的磁等离子体响应。超颖表面的属性可以使用有效介质的方法来精确地建模，该方法考虑了太赫兹电场引起的条带的电容相互作用。我们的研究结果突出了石墨烯基THz器件的前景，该器件利用图案化产生的强烈增强的光-物质相互作用。
The rise of terahertz (THz)-based technologies has prompted intense interest in methods for manipulating the properties of THz radiation. In this Letter, we experimentally demonstrate a graphene micro-ribbon-based metasurface that allows us to tailor and dynamically tune the transmission and polarization rotation spectra of impinging THz pulses. This is achieved by controlling the geometry of the ribbon pattern and the applied DC magnetic field, both of which strongly influence the magnetoplasmonic response of the metasurface. The properties of the metasurface can be accurately modeled using an effective medium approach that considers the capacitive interaction of the ribbons resulting from the THz electric field. Our results highlight the promise of graphene-based THz devices that leverage the strongly enhanced light–matter interactions resulting from patterning.