Terahertz frequency radiation from Bloch oscillations inGaAs/Al0.3Ga0.7Assuperlattices

Autor:	Y Shimada, Kui-juan Jin, M Odnoblyudov, Kazuhiko Hirakawa, Koung-An Chao
Rok vydání:	2003
Předmět:	Physics Condensed matter physics Field (physics) Terahertz radiation Superlattice Electric field Bloch oscillations Semiclassical physics Radiation Radiant intensity
Zdroj:	Physical Review B. 68
ISSN:	1095-3795 0163-1829
DOI:	10.1103/physrevb.68.153315
Popis:	We have performed a joint theoretical and experimental study to investigate the terahertz radiation from Bloch oscillations in a GaAs/Al0.3Ga0.7As superlattice under the condition that there is no Zener tunneling. The total radiation intensity has been calculated with a semiclassical approach in the low field regime where the Wannier-Stark ladder (WSL) cannot be resolved, and with an exact numerical solution in the high field regime where the WSL is well formed. With an adjustment of the intensity units, without fitting material parameters, the calculated results agree almost perfectly with the measured data given in arbitrary units. Consequently, our work gives convincing evidence that the measured THz radiation is due to the Bloch oscillations.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8fe07d028ee0ca973df5659e1ec7bb01 https://doi.org/10.1103/physrevb.68.153315 Zobrazit plný text záznamu