Department of Physics, Korean Advanced Institute of Science and Technology, Daejeon 305-701, Korea.
Opt Lett. 2010 Feb 15;35(4):508-10. doi: 10.1364/OL.35.000508.
Single-point imagery of 2D objects is proposed by exploiting the extreme broadband nature of an ultrafast terahertz wave. In the proposed imagery, a collimated terahertz beam is illuminated on an object, and the scattered fields are measured through a hole at the Fourier plane in a conventional terahertz time-domain spectroscope. This arrangement allows conversion of radial spatial frequencies of the object to the temporal spectrum of the pulse. Hence, a 2D image can be readily obtained by rotating a hole around the optical axis. Experimental results confirm that a complicated object can be reliably imaged using only 30 waveform measurements.
本文提出了一种利用太赫兹波的极宽带特性进行二维物体单点成像的方法。在该成像方法中，将平行的太赫兹光束照射到物体上，并通过传统太赫兹时域光谱仪傅里叶平面上的一个孔来测量散射场。这种布置方式可以将物体的径向空间频率转换为脉冲的时域光谱。因此，通过绕光轴旋转孔，即可方便地获得二维图像。实验结果证实，仅需 30 次波形测量即可可靠地对复杂物体进行成像。
