Terahertz computed tomorgraphy with a quantum cascade laser and a quantum-well photodetector

被引：0
|
作者：
Zhou, Tao [1 ]
Gu, Li [1 ]
Tan, Zhi Yong [1 ]
Cao, Jun Cheng [1 ]
机构：
[1] Chinese Acad Sci, Key Lab Terahertz Solid State Technol, Shanghai Inst Microsyst & Informat Technol, Shanghai 200050, Peoples R China
来源：
JOURNAL OF THE KOREAN PHYSICAL SOCIETY | 2013年 / 63卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Quantum cascade laser; Quantum-well photodetector; Terahertz; Computed tomography;
D O I：
10.3938/jkps.63.185
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
In this letter, a terahertz (THz) tomography system based on a quantum cascade laser (QCL) and a quantum-well photodetector (QWP) is demonstrated. The QCL provides a relatively high power (a few microwatts) in a continuous-wave mode at 3.9 THz as a light source, and the QWP provides a narrow response range from 3 to 7 THz with a calibrated peak response of 0.5 A/W under background-limited performance. We employ the widely-used filtered back projection (FBP) and algebraic reconstruction algorithms for terahertz tomography technology. The reconstructed cross-sectional image of a sample has successfully revealed the internal and the external structures with a resolution of around 1.5 mm. This experiment demonstrates that the terahertz QCL and the photodetector are potentially useful for terahertz tomography applications.
引用
收藏
页码：185 / 188
页数：4
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