Journal
IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY
Volume 3, Issue 5, Pages 617-624Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TTHZ.2013.2273226
Keywords
Computed tomography; imaging; quantum-cascade laser (QCL); scanning mirror; terahertz (THz)
Funding
- Investitionsbank Berlinunder Grants within EFRE program of the European Union [10146488, 10146490]
- Helmholtz Research School on Security Technologies
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A terahertz imaging system based on a quantum-cascade laser (QCL), a fast scanning mirror, and a sensitive Ge:Ga detector is demonstrated. Transmission images are obtained by scanning the beam of the QCL across an object. Images with a diameter of approximately 40 mm and a signal-to-noise ratio of up to 28 dB were obtained within 1.1 s. The system was also used to obtain three-dimensional images of objects in an ellipsoidal volume with axes of approximately 40 mm by computed tomography within 87 s.
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