Title :
Coherent control of Bloch oscillations-from breathing mode quantum beats to spatial oscillations
Author :
Sudzius, M. ; Loser, F. ; Lyssenko, V.G. ; Leo, K. ; Dignam, M.M. ; Kohler, Klaus
Author_Institution :
Inst. fur Angewandt Photophys., Tech. Univ. Dresden
Abstract :
Summary form only given. We present new results that show directly that the spatial motion of the wavepacket can be controlled by the laser excitation. For excitation below and above the center of the Wannier-Stark ladder (WSL), the wave packet performs a pronounced harmonic oscillation. In between, temporal oscillations, which are only associated with small center-of-mass amplitudes (so-called breathing modes), are observed. We shows total peak shifts of the WSL transition in a 67/17 Å GaAs-AlGaAs semiconductor superlattice (SL) as a function of the center energy of the excitation laser pulse
Keywords :
III-V semiconductors; aluminium compounds; excited states; gallium arsenide; light coherence; quantum optics; semiconductor superlattices; 17 A; 67 A; Bloch oscillations; GaAs-AlGaAs; GaAs-AlGaAs semiconductor superlattice; WSL transition; Wannier-Stark ladder; breathing mode quantum beats; center energy; excitation laser pulse; laser excitation; pronounced harmonic oscillation; small center-of-mass amplitudes; so-called breathing modes; spatial motion; spatial oscillations; temporal oscillations; total peak shifts; wave packet; wavepacket; Acoustic pulses; Atom optics; Laser excitation; Optical feedback; Optical pulse shaping; Optical pulses; Optical superlattices; Pulse amplifiers; Pulse measurements; Shape control;
Conference_Titel :
Quantum Electronics Conference, 1998. IQEC 98. Technical Digest. Summaries of papers presented at the International
Conference_Location :
San Francisco, CA
Print_ISBN :
1-55752-541-2
DOI :
10.1109/IQEC.1998.680012
