Many-body effects in the gain spectra of highly excited quantum-dot lasers
Many-body effects in the gain spectra of highly excited quantum-dot lasers
复制标题
高激发量子点激光器增益光谱中的多体效应
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
S. Koch
中科院分区：
文献类型：
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作者：
H. Schneider;W. Chow;S. Koch
计算了量子点在高激发条件下的光学增益谱，其中量子点周围存在不可忽略的二维载流子密度。用屏蔽的Hartree-Fock理论描述库仑相互作用的影响，我们发现点和量子阱跃迁有不同的自能位移。此外，与量子阱和体系统的结果相比，计算的量子点跃迁处的峰值增益（包括库仑效应）从其自由载流子值减小。
Optical gain spectra are computed for quantum dots under high excitation conditions, where there is a non-negligible two-dimensional carrier density surrounding the dots. Using a screened Hartree-Fock theory to describe the influence of the Coulomb interaction, we find different self-energy shifts for the dot and quantum-well transitions. Furthermore, in contrast to the result for quantum-well and bulk systems, the peak gain at the quantum-dot transition computed including Coulomb effects is reduced from its free carrier value.