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Previously negative differential conductivity caused by Bloch oscillations of electrons was demonstrated in SiC natural superlattice for bipolar n++ — π — n+ structures at T=300 K. Here we investigate THz emission and electrical characteristics of the similar structures at 7 K and show common nature of both phenomena (the THz emission and the negative differential conductivity) caused by the Bloch...
Studies of strong terahertz (THz) electroluminescence in several SiC natural superlattices allowed us to reveal changes in the emission spectra, which are in well consistency with the theory of electron Bloch oscillations, and to discover new channels of intensive THz electroluminescence.
We report on injection induced terahertz electroluminescence from SiC p-n junctions. The emission is assigned to intracenter optical transitions in shallow donors, initiated by the injection.
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