论文标题
测量光学机械涡流束的轨道角动量
Measuring orbital angular momentum of vortex beams in optomechanics
论文作者
论文摘要
由于理论上无界和正交模式，测量涡流束的轨道角动量（OAM）具有良好的应用前景。在这里，提出了光学机械的可区分的签名OAM测量，该测量是通过在双Laguerre-Gaussian（LG）旋转式载体系统中监视探针场的传输频谱的变化来实现的。与传统的单个LG旋转腔相比，我们的系统中可能会发生不对称的光机电诱导的透明度窗口。同时，共振谷的位置与OAM的大小和符号有很强的相关性。这最初来自以下事实：从驾驶场上的腔模式的有效失呼可以随注意到的大小和符号而变化，这会导致光谱移动对于不同体征的不同符号。我们的方案解决了无法区分光学机械oAM符号的缺点，并且适用于具有拓扑电荷值$ \ pm 45 $的高阶涡流梁，这是基于腔光磁机械系统的OAM的重大改进。
Measuring the orbital angular momentum (OAM) of vortex beams, including the magnitude and the sign, has great application prospects due to its theoretically unbounded and orthogonal modes. Here, the sign-distinguishable OAM measurement in optomechanics is proposed, which is achieved by monitoring the shift of the transmission spectrum of the probe field in a double Laguerre-Gaussian (LG) rotational-cavity system. Compared with the traditional single LG rotational cavity, an asymmetric optomechanically induced transparency window can occur in our system. Meanwhile, the position of the resonance valley has a strong correlation with the magnitude and sign of OAM. This originally comes from the fact that the effective detuning of the cavity mode from the driving field can vary with the magnitude and sign of OAM, which causes the spectral shift to be directional for different signs of OAM. Our scheme solves the shortcoming of the inability to distinguish the sign of OAM in optomechanics, and works well for high-order vortex beams with topological charge value $\pm 45$, which is a significant improvement for measuring OAM based on the cavity optomechanical system.
