论文标题
使用基于原子的成像的Terahertz轨道角动量光束快速读数
Rapid readout of terahertz orbital angular momentum beams using atom-based imaging
论文作者
论文摘要
我们使用基于原子蒸气的成像技术证明了Terahertz（THZ）轨道角动量（OAM）梁的快速读数。具有方位角和径向指标的OAM模式是使用仅相位传输板创建的。光束会在原子蒸气中经历Terahertz到光学转化，然后使用光学CCD摄像头在远场进行成像。除空间强度曲线外，我们还通过通过倾斜镜头进行成像来观察梁的自我互动图，从而可以直接读取方位角指数的符号和幅度。使用此技术，我们可以在10毫秒内可靠地读取具有高保真度的低强度束的OAM模式。预计这种示范会对Terahertz OAM梁在通信和显微镜检查中提出的应用产生深远的影响。
We demonstrate the rapid readout of terahertz (THz) orbital angular momentum (OAM) beams using an atomic-vapour based imaging technique. OAM modes with both azimuthal and radial indices are created using phase-only transmission plates. The beams undergo terahertz to optical conversion in an atomic vapour, before being imaged in the far field using an optical CCD camera. In addition to the spatial intensity profile, we also observe the self-interferogram of the beams by imaging through a tilted lens, allowing the sign and magnitude of the azimuthal index to be read out directly. Using this technique, we can reliably read out the OAM mode of low-intensity beams with high fidelity in 10 ms. Such a demonstration is expected to have far-reaching consequences for proposed applications of terahertz OAM beams in communications and microscopy.
