Fast terahertz imaging with a quantum-cascade laser and a scanning mirror
Infrared, Millimeter, and Terahertz Waves（2012）
摘要
A terahertz imaging system based on a quantum-cascade laser, a fast scanning mirror, and a Ge:Ga detector is demonstrated. Transmission images are obtained by scanning the beam of the quantum-cascade laser across an object. Images with a diameter of approximately 45 mm and a signal-to-noise ratio of approximately 25 dB were obtained within 1.1 s. The system was also used to obtain three-dimensional images by computed tomography within an acquisition time of 87 s.
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关键词
elemental semiconductors,gallium,germanium,image processing,mirrors,quantum cascade lasers,terahertz wave imaging,ge:ga,ge:ga detector,computed tomography,fast scanning mirror,fast terahertz imaging,quantum-cascade laser,signal-to-noise ratio,terahertz imaging system,three-dimensional images,time 1.1 s,time 87 s,transmission images
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