Fano resonances in a high-Q terahertz whispering-gallery mode resonator coupled to a multi-mode waveguide.
Fano resonances in a high-Q terahertz whispering-gallery mode resonator coupled to a multi-mode waveguide.
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DOI：
10.1364/ol.42.004359
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发表时间：
2017-11
期刊：
影响因子：
3.6
通讯作者：
D. Vogt;R. Leonhardt
中科院分区：
文献类型：
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作者：
D. Vogt;R. Leonhardt
我们报告了在太赫兹（THz）频率范围内耦合到多模波导的高质量（Q）回音壁模式（WGM）球形谐振器中的Fano谐振。相干连续波（CW）太赫兹光谱测量检测到的Fano共振的非对称线形和相位与分析模型非常吻合。在0.35 THz附近观察到非常高的Q因子1600和临界耦合处的精细度22。据我们所知，这是有史以来报道的太赫兹WGM谐振器的最高Q因子。
We report on Fano resonances in a high-quality (Q) whispering-gallery mode (WGM) spherical resonator coupled to a multi-mode waveguide in the terahertz (THz) frequency range. The asymmetric line shape and phase of the Fano resonances detected with coherent continuous-wave (CW) THz spectroscopy measurements are in excellent agreement with the analytical model. A very high Q factor of 1600, and a finesse of 22 at critical coupling is observed around 0.35 THz. To the best of our knowledge this is the highest Q factor ever reported for a THz WGM resonator.