Intersubband semiconductor light sources: history, status, and future
Intersubband semiconductor light sources: history, status, and future
Helm, M.
After the first theoretical proposal in 1971, it took more than two decades until the first laser based on intersubband transitions in semiconductor quantum structures was demonstrated. The progress since then has indeed been spectacular with lasers now spanning the range from 3.5 to 140 microns. The physics of these devices will be elucidated and some crucial achievements will be highlighted. Finally the perspectives for closing the still existing wavelength gap (25-60 microns) and extending the covered range to even longer as well as shorter wavelength will be discussed.
Keywords: intersubband transitions; quantum cascade laser; semiconductor light emitters; infrared
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Lecture (Conference)
Plenary talk at The Joint 29th International Conference on Infrared and Millimeter Waves and 12th International Conference on Terahertz Electronics (IRMMW 2004/THz 2004), Karlsruhe, Germany -
Contribution to proceedings
Infrared and Millimeter Waves, 2004 and 12th International Conference on Terahertz Electronics, 2004. Conference Digest of the 2004 Joint 29th International Conference on 27 Sept.-1 Oct. 2004 Page(s): 57 - 58
Permalink: https://www.hzdr.de/publications/Publ-6367
