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Enhancing light–matter interaction in cavity quantum electrodynamics has aroused widespread interests in on-chip quantum information processing. Here, we propose a hybrid nanotoroid–nanowire system to enhance photon–exciton interaction. A nanoscale gap is formed by placing a dielectric nanowire close to a dielectric nanotoroid, where the coupling coefficient between photon and emitter can achieve 5.55 times of that without nanogap. Meanwhile, the cavity loss and spontaneous emission of the emitter will remain at a small value to guarantee the realization of strong coupling. The method might hold promise for the research of nanophotonics,quantum optics, and novel optical devices. 相似文献
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由于具有易燃、易爆特性,故成品油挥发气体的温度检测具有重要的实际意义,而作为绝缘器件的光纤光栅传感器在此传感领域具有天然的优势。本文在实验上设计了一种基于腐蚀光栅(Etched Fiber Bragg Grating)的温度传感器,并将其用于空气、柴油和汽油挥发气体的温度测量。推导了腐蚀光栅的反射波长随温度变化的理论表达式,并与实验现象进行了对比。理论结论与实验结果吻合。同时实验发现,气体的温度变化与光栅波长的漂移量呈现良好的线性关系,表明FBG倏逝波传感器完全适用于测量成品油挥发气体的温度。 相似文献
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