Tunable far-infrared photovoltaic response in semiconductor field-effect devices

Batke, E.; Kaminsky, J.; Kotthaus, J. P.; Spector, J.
January 1989
Applied Physics Letters;1/9/1989, Vol. 54 Issue 2, p131
Academic Journal
In semiconductor field-effect devices with quasi-two-dimensional electron channels we observe a novel resonant photovoltaic response to the high-power radiation of a far-infrared free-electron laser. A fast photovoltaic signal occurs when a laser pulse is resonantly absorbed by a plasmon in the two-dimensional electron system. The plasmon frequency and hence the resonant photovoltaic response can be voltage tuned via field effect.


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