The intensive terahertz electroluminescence induced by Bloch oscillations in SiC natural superlattices

Nanoscale Research Letters (Impact Factor: 2.78). 10/2012; 7(1):560. DOI: 10.1186/1556-276X-7-560
Source: PubMed


We report on efficient terahertz (THz) emission from high-electric-field-biased SiC structures with a naturalsuperlattice at liquid helium temperatures. The emission spectrum demonstrates a single line, the maximum of which shifts linearly with increases in bias field. We attribute this emission to steady-state Bloch oscillations of electrons in the SiC natural superlattice. The properties of the THz emission agree fairly with the parameters of the Bloch oscillator regime, which have been proven by high-field electron transport studies of SiC structures with natural superlattices.