Cascading enables ultrafast gain recovery dynamics of quantum dot semiconductor optical amplifiers
Cascading enables ultrafast gain recovery dynamics of quantum dot semiconductor optical amplifiers
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DOI：
10.1103/physrevb.82.235301
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发表时间：
2010-12-01
影响因子：
3.7
通讯作者：
Schoell, Eckehard
中科院分区：
文献类型：
--
作者：
Majer, Niels;Luedge, Kathy;Schoell, Eckehard
在这项工作中，量子点半导体光放大器的超快增益恢复动力学的基础上的半导体布洛赫方程，包括微观计算的二维载流子库和受限的量子点基态和第一激发态之间的载流子-载流子散射率。通过分析不同的散射贡献，我们表明，级联过程作出了重大贡献的超快恢复动力学。
In this work the ultrafast gain recovery dynamics of a quantum dot semiconductor optical amplifier is investigated on the basis of semiconductor Bloch equations including microscopically calculated carrier-carrier scattering rates between the two-dimensional carrier reservoir and the confined quantum dot ground and first excited state. By analyzing the different scattering contributions we show that the cascading process makes a major contribution to the ultrafast recovery dynamics.