000141162 001__ 141162
000141162 005__ 20180913055422.0
000141162 0247_ $$2doi$$a10.1103/PhysRevB.68.085207
000141162 02470 $$2ISI$$a000185287500029
000141162 037__ $$aARTICLE
000141162 245__ $$aResonant Rayleigh scattering dynamics of excitons in single quantum wells
000141162 269__ $$a2003
000141162 260__ $$c2003
000141162 336__ $$aJournal Articles
000141162 520__ $$aThe resonant Rayleigh scattering dynamics of excitons in single GaAs quantum wells is investigated. The deviation of the measured intensity from the ideal ensemble average is analyzed as a function of the speckle ensemble size. The influence of the amplitude and correlation length of the exciton disorder potential is traced using a series of samples with varying inhomogeneous broadening and interface island sizes. The experimental data are compared with theoretical predictions using exciton states of spatially uncorrelated energies, as well as full calculations of the exciton polarization dynamics using a more realistic disorder potential including the formation of monolayer islands. Deviations from the dynamics of uncorrelated states are found at early times after excitation. They are reproduced by the calculations possessing a state correlation due to quantum mechanical level repulsion and a finite correlation length for the disorder potential. Additionally, the presence of a long-range disorder potential in the micrometer range is suggested. Changing the disorder potential by varying the island size influences the observed dynamics systematically according to the different disorder correlation lengths.
000141162 6531_ $$aResolved Speckle Analysis
000141162 6531_ $$aInterface Roughness
000141162 6531_ $$aSecondary-Emission
000141162 6531_ $$aSystem
000141162 6531_ $$aNanostructures
000141162 6531_ $$aLuminescence
000141162 6531_ $$aCoherence
000141162 6531_ $$aDisorder
000141162 6531_ $$aStates
000141162 6531_ $$aGaas
000141162 700__ $$aLangbein, W.
000141162 700__ $$aWoggon, U.
000141162 700__ $$0240001$$aSavona, V.$$g103561
000141162 700__ $$aZimmermann, R.
000141162 700__ $$aReuter, D.
000141162 700__ $$aWieck, A.D.
000141162 700__ $$aKocherscheidt, G.
000141162 773__ $$j68$$tPhysical Review B
000141162 909C0 $$0252001$$pLTPN$$xU10570
000141162 909CO $$ooai:infoscience.tind.io:141162$$pSB$$particle
000141162 937__ $$aLTPN-ARTICLE-2003-002
000141162 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000141162 980__ $$aARTICLE