Observation of grating-induced intersubband emission from GaAs/AlGaAs superlattices

Helm, M.; Colas, E.; England, P.; DeRosa, F.; Allen, S. J.
October 1988
Applied Physics Letters;10/31/1988, Vol. 53 Issue 18, p1714
Academic Journal
We have observed far-infrared emission due to electronic transitions between subbands in GaAs/AlGaAs superlattices. Population of higher subbands is achieved by applying an electric field in the plane of the layers. The radiation is coupled out of the sample by a metallic grating on the surface.


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