Remotely sensing an object's rotational orientation using the orbital angular momentum of light
Remotely sensing an object's rotational orientation using the orbital angular momentum of light
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DOI：
10.3788/col201715.030012
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发表时间：
2017-03-10
影响因子：
3.5
通讯作者：
Bai, Lianfa
中科院分区：
文献类型：
--
作者：
Milione, Giovanni;Wang, Ting;Bai, Lianfa
对于自动驾驶汽车等新兴技术来说，用光遥感物体是必不可少的。在这里，物体的旋转方向是利用光的轨道角动量来遥感的。物体被高斯光束照亮并部分遮挡高斯光束。利用SLM，采用类似于Stokes偏振法的方法测量了部分阻挡高斯光束各组成OAM模式之间的相位差。结果表明，相位差与物体的旋转方向成正比。讨论了与使用像素化相机的比较以及在毫米波条件下的实现。
Remotely sensing an object with light is essential for burgeoning technologies, such as autonomous vehicles. Here, an object's rotational orientation is remotely sensed using light's orbital angular momentum. An object is illuminated by and partially obstructs a Gaussian light beam. Using an SLM, the phase differences between the partially obstructed Gaussian light beam's constituent OAM modes are measured analogous to Stokes polarimetry. It is shown that the phase differences are directly proportional to the object's rotational orientation. Comparison to the use of a pixelated camera and implementation in the millimeter wave regime are discussed.