Title :
Terahertz radiation from spin coherence in diluted magnetic semiconductors
Author :
Rungsawang, R. ; Perez, F. ; Oustinov, D. ; Gomez, J. ; Kolkovsky, V. ; Karczewski, G. ; Wojtowicz, T. ; Madéo, J. ; Jukam, N. ; Dhillon, S.S. ; Tignon, J.
Author_Institution :
Ecole Normale Super., Univ. Paris P. et M. Curie, Paris, France
Abstract :
The transient terahertz radiation emitted by a spin coherence optically generated in CdMnTe two-dimensional electron gases is directly measured in the time domain using electro-optic sampling. The spin radiation decays in a few ps at high magnetic fields. We also provide a full theoretical description within first principle calculations of both the generation of spin waves, precession and emission of THz radiation.
Keywords :
cadmium compounds; magnetic semiconductors; spin waves; terahertz waves; 2D electron gases; CdMnTe; diluted magnetic semiconductors; electrooptic sampling; spin coherence; spin radiation decays; spin waves; terahertz radiation; Coherence; Magnetic fields; Magnetic semiconductors; Optical pulses; Stimulated emission; Transient analysis; Ultrafast optics;
Conference_Titel :
Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2012 37th International Conference on
Conference_Location :
Wollongong, NSW
Print_ISBN :
978-1-4673-1598-2
Electronic_ISBN :
2162-2027
DOI :
10.1109/IRMMW-THz.2012.6380354
