Optically active mechanical modes of tapered optical fibers
Optically active mechanical modes of tapered optical fibers
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锥形光纤的光学活性机械模式
DOI：
10.1103/physreva.88.061801
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发表时间：
2013
影响因子：
2.9
通讯作者：
A. Rauschenbeutel
中科院分区：
文献类型：
--
作者：
C. Wuttke;G. Cole;A. Rauschenbeutel
具有束腰的锥形光纤是广泛使用的工具，用于经由光纤的倏逝场将光有效地耦合到光子器件或量子发射器。为了确保耦合得到良好控制，纳米纤维引导光场的相位和偏振必须稳定。在这里，我们表明，在典型的锥形光纤这些量表现出高频热波动。它们起源于光机械耦合到纳米纤维引导的光的高Q扭转振荡。我们提出了一个简单的从头算理论模型，定量地解释了扭转模谱，并可用于设计定制的机械性能的锥形光纤。
Tapered optical fibers with a nanofiber waist are widely used tools for efficient coupling of light to photonic devices or quantum emitters via the nanofiber's evanescent field. In order to ensure well-controlled coupling, the phase and polarization of the nanofiber guided light field have to be stable. Here, we show that in typical tapered optical fibers these quantities exhibit high-frequency thermal fluctuations. They originate from high-Q torsional oscillations that opto-mechanically couple to the nanofiber-guided light. We present a simple ab-initio theoretical model that quantitatively explains the torsional mode spectrum and that can be used to design tapered optical fibers with tailored mechanical properties.