Self-sustained current oscillation above 100 GHz in a GaAs/AlAs superlattice

DOI to cite this document:: 10.5283/epub.10889

Schomburg, Ekkehard ; Henini, M. ; Chamberlain, J. M. ; Steenson, D. P. ; Brandl, S. ; Hofbeck, K. ; Renk, Karl Friedrich ; Wegscheider, Werner

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Date of publication of this fulltext: 09 Nov 2009 13:32

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Abstract

A GaAs/AlAs superlattice with a large miniband (120 meV) showed self-sustained current oscillation at a frequency of 103 GHz giving rise to microwave emission (power 0.5 mW). The emission line had a linewidth of about 1 MHz and was tuneable by about 800 MHz. An analysis suggests that the transport in the superlattice was mainly due to electrons in the lowest miniband and that the oscillation was ...