access icon free Reflection imaging with terahertz quantum-cascade laser and quantum-well photodetector

A reflection imaging system based on the terahertz quantum-well photodetector is presented. Reflected terahertz imaging of a logo on a universal serial bus (USB) flash disk is demonstrated. A spatial resolution better than 0.4 mm is achieved. This experiment demonstrates that the quantum-well photodetector is potentially useful for reflection imaging applications.

Inspec keywords: quantum well devices; quantum cascade lasers; terahertz wave imaging; reflectivity; photodetectors; disc storage

Other keywords: terahertz quantum-cascade laser; universal serial bus flash disk; USB; reflected terahertz imaging; terahertz quantum- well photodetector

Subjects: Lasing action in semiconductors; Microwave measurement techniques; Photodetectors; Digital storage; Detection of radiation (bolometers, photoelectric cells, i.r. and submillimetre waves detection); Design of specific laser systems; Semiconductor lasers

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http://iet.metastore.ingenta.com/content/journals/10.1049/el.2013.4079
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