Title :
Coherent coupling in inhomogeneously broadened exciton ensembles
Author :
Finger, E. ; Kraft, Silke ; Euteneuer, A. ; Hofmann, Martin ; Stolz, Wolfgang ; Meier, T. ; Thomas, Paul ; Koch, S.W. ; Ruhle, W.W.
Author_Institution :
Fachbereich Phys., Philipps-Univ., Marburg, Germany
Abstract :
Summary form only given. Inhomogeneous broadening is the most obvious consequence of disorder, and an inhomogeneously broadened exciton line might be considered as a superposition of homogeneously broadened subensembles of excitons. However, a possible coherent coupling in inhomogeneously broadened exciton ensemble structures leads to effects like disorder induced dephasing. We study the excitonic structure of various semiconductor quantum wells with different types and strengths of disorder by means of coherent excitation spectroscopy.
Keywords :
excitons; light coherence; semiconductor quantum wells; spectroscopy; coherent coupling; coherent excitation spectroscopy; disorder induced dephasing; homogeneously broadened exciton subensemble; inhomogeneously broadened exciton ensemble structures; inhomogeneously broadened exciton ensembles; inhomogeneously broadened exciton line; semiconductor quantum wells; Diffusion processes; Excitons; Fingers; Four-wave mixing; Length measurement; Polarization; Resonance;
Conference_Titel :
Quantum Electronics Conference, 2000. Conference Digest. 2000 International
Conference_Location :
Nice, France
Print_ISBN :
0-7803-6318-3
DOI :
10.1109/IQEC.2000.908097
