Terahertz aperture SNOM mapping of metamaterial coupled resonators
Terahertz aperture SNOM mapping of metamaterial coupled resonators
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DOI：
10.1117/12.2568045
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发表时间：
2020-08
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影响因子：
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通讯作者：
N. Almond;R. Hermans;L. Hale;S. Kindness;W. Michailow;B. Wei;X. Romain;Sheng Ye;R. Young-
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文献类型：
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作者：
N. Almond;R. Hermans;L. Hale;S. Kindness;W. Michailow;B. Wei;X. Romain;Sheng Ye;R. Young-
由于超材料的多功能性和强的光-物质相互作用，超材料已经成为在太赫兹（THz）范围内工作的新型光电平台的基础。高效调制器和检测器的必要设计需要详细研究超材料共振及其与活性介质（例如石墨烯）的相互作用。利用基于皮秒太赫兹脉冲的孔径超近场光学（a-SNOM）系统研究了一组光刻调谐超材料耦合谐振器的光谱特性。这种方法允许每个谐振器的支持的E-场的映射从设备平面几微米，产生键合和反键合模式，让人想起电磁感应透明。
Metamaterials have emerged as the basis of a novel optoelectronic platform operating in the terahertz (THz) range, due to their versatility and strong light-matter interaction. The necessary design of efficient modulators and detectors requires a detailed investigation of metamaterial resonances and their interplay with an active medium, e.g. graphene. An aperture-SNOM (a-SNOM) system based on picosecond THz pulses was used to investigate the spectral characteristics of a set of lithographically tuned metamaterial coupled resonators. This approach allowed the mapping of the supported E-field of each resonator a few microns from the device plane, yielding bonding and antibonding modes reminiscent of electromagnetic induced transparency.