High-sensitivity attenuated total internal reflection continuous-wave terahertz imaging
High-sensitivity attenuated total internal reflection continuous-wave terahertz imaging
复制标题
高灵敏度衰减全内反射连续波太赫兹成像
DOI：
10.1088/1361-6463/aa7d9a
复制
发表时间：
2017-09-20
影响因子：
3.4
通讯作者：
Yao, Jianquan
中科院分区：
文献类型：
--
作者：
Liu, Hongxiang;Wang, Yuye;Yao, Jianquan
我们演示了一个衰减全内反射成像系统。通过在垂直面内移动的棱镜，以固定高度水平入射连续太赫兹波，对棱镜顶部的样品进行二维扫描，可以获得样品的表面信息。研究了该方法的原理和可行性。分析了棱镜的有效成像面积、图像分辨率和对比度增强与稳定性改善的偏振依赖性。以固体琼脂、蒸馏水和猪组织为例，说明该方法具有灵敏度高、样品制备简单等优点。实验和理论结果一致表明，p偏振有助于增强图像对比度和衰减的全内反射信号的强度更稳定。
We demonstrate an attenuated total internal reflection imaging system. The surface information of the sample on top of a prism can be acquired by two-dimensionally scanning this prism moving in the vertical plane with horizontally incident continuous terahertz waves at a fixed height. The principles and feasibility of this method are investigated. The effective imaging area on the prism, image resolution and polarization dependence of contrast enhancement and stability improvement are analyzed. Examples including solid agar, distilled water and porcine tissue are presented, demonstrating the method’s advantages of high sensitivity and simple sample preparation. The experimental and theoretical results consistently show that p-polarization contributes to enhanced image contrast and more stable intensity of the attenuated total internal reflected signal.