高Q值光子晶体薄膜微腔的近场成像和频率调谐
Near-field imaging and frequency tuning of a high-Q photonic crystal membrane microcavity
摘要：
讨论了品质因数Q=55000的光子晶体薄膜谐振器与纳米物体相互作用的实验研究。通过在光子晶体的近场中控制驱动玻璃光纤尖端，我们构建了谐振腔模式及其与光纤尖端耦合的完整的空间光谱图。一方面，我们的研究结果表明，扫描探针可以深刻影响的光学特性和近场图像的光子器件。另一方面，我们表明，引入纳米级的对象提供了一个低损耗的方法按命令调谐的光子晶体谐振器频率。我们的结果是在一个非常好的协议与预测的组合数值/分析理论。
英文摘要：
We discuss experimental studies of the interaction between a nanoscopic object and a photonic crystal membrane resonator of quality factor Q=55000. By controlled actuation of a glass fiber tip in the near-field of a photonic crystal, we constructed a complete spatio-spectral map of the resonator mode and its coupling with the fiber-tip. On the one hand, our findings demonstrate that scanning probes can profoundly influence the optical characteristics and the near-field images of photonic devices. On the other hand, we show that the introduction of a nanoscopic object provides a low-loss method for on-command tuning of a photonic crystal resonator frequency. Our results are in a very good agreement with the predictions of a combined numerical/analytical theory.
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