Abstract
Impulsively excited Bloch oscillations in semiconductor superlattices are attractive for the generation of coherent terahertz (THz) electromagnetic radiation tunable with a dc bias field over the wide frequency range from 0.2 to 10 THz. So far, only the emission characteristics at low density of the photo-excited charge carriers (1-3×109 cm-2 per well) have been investigated.1 For technical acceptable emission, the carrier density must be increased. According to the standard theory of emission from coherent ensembles (superradiant emission)2, the radiation power should scale quadratically with excitation density. For the signal decay rate, however a linear density dependence is expected.
© 1996 Optical Society of America
PDF ArticleMore Like This
R Martini, G Klose, HG Roskos, H Kurtz, R Hey, HT Grahn, and K Ploog
WL12 International Quantum Electronics Conference (IQEC) 1996
T. Dekorsy, A.M.T. Kim, H. Kurz, and K. Köhler
WC.1 International Conference on Ultrafast Phenomena (UP) 1996
Christian Waschke, Ralf Schwedler, Youssef Dhaibi, Hartmut G. Roskos, Heinrich Kurz, and Klaus Köhler
QWB1 European Quantum Electronics Conference (EQEC) 1994