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- Title
Terahertz-emission generation caused by new effects in the 6 H-SiC natural superlattice.
- Authors
Sankin, V.; Andrianov, A.; Zakhar'in, A.; Petrov, A.
- Abstract
It is demonstrated that the 6 H-SiC natural superlattice has two simultaneously electroluminescence channels in the terahertz range: narrow lines at frequencies of 1.6-2.3 THz and broader lines at frequencies of about 3.25 THz. The first channel is formed by transitions between the localized states of the Wannier-Stark ladder in the Bloch oscillation mode in the first conduction miniband at point M of the hexagonal Brillouin zone. The second channel is probably caused by transitions between Wannier-Stark ladders formed by electric-field mixing of degenerate states of the conduction band at point K of the hexagonal Brillouin zone. The conduction-band minimum at point K is higher than that at point M by 100-200 meV.
- Subjects
TERAHERTZ materials; SILICON carbide; SUPERLATTICES; WANNIER-stark effect; ELECTROLUMINESCENCE; BRILLOUIN zones
- Publication
Semiconductors, 2015, Vol 49, Issue 2, p242
- ISSN
1063-7826
- Publication type
Article
- DOI
10.1134/S1063782615020190