Neukirch U, Bolton S R, Fromer N A, Sham L J, Chemla D S
Department of Physics, University of California and Materials Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road MS 2-346, Berkeley, California 94720, USA.
Phys Rev Lett. 2000 Mar 6;84(10):2215-8. doi: 10.1103/PhysRevLett.84.2215.
The influence of four-particle correlations on the nonlinear optics of a semiconductor microcavity is determined by a pump-and-probe investigation. Experiments are performed on a nonmonolithic microcavity which contains a ZnSe quantum well. In this system the biexciton binding energy exceeds both the normal-mode splitting between exciton and cavity mode and all damping constants. Oscillatory spectral features below the excitonic resonance are observed in the response for counterpolarized beams. Comparison with model calculations shows that in this case the coherent nonlinearity is dominated by biexciton-exciton interactions beyond the Hartree-Fock approximation.
通过泵浦-探测研究确定了四粒子关联对半导体微腔非线性光学的影响。实验是在一个包含ZnSe量子阱的非单片微腔上进行的。在这个系统中，双激子结合能超过了激子与腔模之间的正常模式分裂以及所有的阻尼常数。在反极化光束的响应中观察到了低于激子共振的振荡光谱特征。与模型计算的比较表明，在这种情况下，相干非线性主要由超越哈特里-福克近似的双激子-激子相互作用主导。
