Title :
Dynamics of the collective excitations of the quantum hall ferromagnet
Author :
Dani, K.M. ; Tignon, J. ; Breit, M. ; Chemla, D.S. ; Kavousanaki, E.G. ; Karathanos, A.T. ; Perakis, L.E.
Author_Institution :
Dept. of Phys., California Univ., Berkeley, CA
Abstract :
We present a femtosecond probe of collective nanoscale excitations with three-pulse ultrafast four-wave-mixing spectroscopy. By comparing theory and experiment, we extract the dynamical and dephasing properties of the inter-Landau-level magnetoplasmons of the quantum Hall ferromagnet
Keywords :
Landau levels; ferromagnetic materials; high-speed optical techniques; multiwave mixing; plasmons; quantum Hall effect; quantum wells; collective excitations; dephasing properties; dynamical properties; femtosecond probe; four-wave-mixing spectroscopy; interLandau-level magnetoplasmons; modulation doped quantum wells; nanoscale excitations; quantum Hall ferromagnet; three-pulse spectroscopy; ultrafast spectroscopy;
Conference_Titel :
Quantum Electronics Conference, 2004. (IQEC). International
Conference_Location :
San Francisco, CA
Print_ISBN :
1-55752-778-4
