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Generation of Terahertz radiation with two color semiconductor lasers
Author(s) -
Hoffmann S.,
Hofmann M.R.
Publication year - 2007
Publication title -
laser and photonics reviews
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.778
H-Index - 116
eISSN - 1863-8899
pISSN - 1863-8880
DOI - 10.1002/lpor.200710004
Subject(s) - terahertz radiation , laser , optoelectronics , optics , semiconductor laser theory , diode , radiation , amplifier , semiconductor , photomixing , terahertz spectroscopy and technology , materials science , physics , far infrared laser , terahertz metamaterials , cmos
We discuss and analyze concepts for the generation of tuneable continuous wave terahertz (THz) radiation with two color diode lasers. First, different geometries of two color lasers are reviewed. We show that the THz power of two color lasers in combination with external photomixers becomes sufficient for scanning THz imaging applications when optical amplification with a tapered amplifier is implemented. Then, the concept of direct emission of THz radiation out of a two‐color semiconductor laser is reviewed and the potential of this concept with respect to THz bandwidth and achievable THz power is critically analyzed.