Quantum kinetic effects in the optical absorption of semiconductor quantum-dot systems
Quantum kinetic effects in the optical absorption of semiconductor quantum-dot systems
复制标题
半导体量子点系统光吸收中的量子动力学效应
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
F. Jahnke
中科院分区：
文献类型：
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作者：
M. Lorke;T. Nielsen;J. Seebeck;P. Gartner;F. Jahnke
用微观理论研究了半导体量子点的光学性质。由量子动力学方程确定了载流子-载流子库仑相互作用和载流子-声子相互作用引起的相干偏振的退相。我们调查的密度依赖性的退相机制，并比较各种相互作用过程的相关性。经常使用的近似的基础上GKBA与自由单粒子能量的失败证明纯退相过程只涉及本地化的量子点状态。
A microscopic theory is used to study the optical properties of semiconductor quantum dots. The dephasing of the coherent polarization due to carrier-carrier Coulomb interaction and carrier-phonon interaction is determined from quantum kinetic equations. We investigate the density dependence of the dephasing mechanisms, and compare the relevance of various interaction processes. The failure of frequently used approximations based on the GKBA with free single-particle energies is demonstrated for pure dephasing processes involving only the localized quantum-dot states.