Langbein Wolfgang, Hvam Jørn M
Experimentelle Physik EIIb, Universität Dortmund, Otto-Hahn-Strasse 4, D-44227 Dortmund, Germany.
Phys Rev Lett. 2002 Jan 28;88(4):047401. doi: 10.1103/PhysRevLett.88.047401. Epub 2002 Jan 15.
The directional dynamics of the resonant Rayleigh scattering from a semiconductor microcavity is investigated. When optically exciting the lower polariton branch, the strong dispersion results in a directional emission on a ring. The coherent emission ring shows a reduction of its angular width for increasing time after excitation, giving direct evidence for the time-energy uncertainty in the dynamics of the scattering by disorder. The ring width converges with time to a finite value, a direct measure of an intrinsic momentum broadening of the polariton states localized by multiple disorder scattering.
研究了半导体微腔中共振瑞利散射的定向动力学。当光学激发下极化激元分支时，强烈的色散导致在环上产生定向发射。相干发射环在激发后随时间增加其角宽度减小，这直接证明了无序散射动力学中的时间-能量不确定性。环宽度随时间收敛到一个有限值，这是由多次无序散射局域化的极化激元态固有动量展宽的直接量度。
