Resonant Secondary Emission from Two-Dimensional Excitons: Femtosecond Time Evolution of the Coherence Properties
Resonant Secondary Emission from Two-Dimensional Excitons: Femtosecond Time Evolution of the Coherence Properties
复制标题
二维激子的共振二次发射：相干性的飞秒时间演化
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
J. Shah
中科院分区：
文献类型：
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作者：
M. Woerner;J. Shah
利用一种新颖的技术，我们同时研究了砷化镓量子阱谐振二次发射的振幅和相干性的飞秒动力学。两个锁相脉冲共振激发半导体中的激子，随后发射的辐射通过飞秒上转换检测。在激发脉冲之间的不同延迟和相位的实验中，我们确定了三种不同的二次发射贡献，它们在时间上具有不同的相干性。
Using a novel technique, we simultaneously study the femtosecond dynamics of the amplitude and the coherence of resonant secondary emission from GaAs quantum wells. Two phase-locked pulses resonantly excite excitons in the semiconductor and the subsequently emitted radiation is detected by femtosecond up-conversion. In experiments at various delays and phases between the excitation pulses we identify three different contributions to the secondary emission with different coherence properties in time.