Terahertz semiconductor-heterostructure laser

@article{Khler2002TerahertzSL,
  title={Terahertz semiconductor-heterostructure laser},
  author={R. K{\"o}hler and A. Tredicucci and F. Beltram and H. Beere and E. Linfield and A. Davies and D. Ritchie and R. Iotti and F. Rossi},
  journal={Nature},
  year={2002},
  volume={417},
  pages={156-159}
}
Semiconductor devices have become indispensable for generating electromagnetic radiation in everyday applications. Visible and infrared diode lasers are at the core of information technology, and at the other end of the spectrum, microwave and radio-frequency emitters enable wireless communications. But the terahertz region (1–10 THz; 1 THz = 1012 Hz) between these ranges has remained largely underdeveloped, despite the identification of various possible applications—for example, chemical… Expand
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