Adaptive feedback control of ultrafast semiconductor nonlinearities
Adaptive feedback control of ultrafast semiconductor nonlinearities
复制标题
超快半导体非线性的自适应反馈控制
DOI：
10.1063/1.1288603
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
U. Keller
中科院分区：
文献类型：
--
作者：
J. Kunde;B. Baumann;S. Arlt;F. Morier;U. Siegner;U. Keller
实验证明，自适应反馈光脉冲整形可以用来控制超快半导体非线性。该控制方案是基于进化算法，它直接调制的光谱相位的20 fs激光脉冲。该算法优化了差分传输实验中测量的宽带半导体连续非线性。我们的研究结果表明，洞察光半导体相互作用是从最佳的激光脉冲形状，即使相互作用是太复杂，预测这种形状的先验。此外，我们证明，自适应反馈控制可以大大提高超快半导体非线性几乎4倍。
We experimentally demonstrate that adaptive feedback optical pulse shaping can be used to control ultrafast semiconductor nonlinearities. The control scheme is based on an evolutionary algorithm, which directs the modulation of the spectral phase of 20 fs laser pulses. The algorithm has optimized the broadband semiconductor continuum nonlinearity measured in differential transmission experiments. Our results show that insight into light–semiconductor interaction is obtained from the optimum laser pulse shape even if the interaction is too complex to predict this shape a priori. Moreover, we demonstrate that adaptive feedback control can substantially enhance ultrafast semiconductor nonlinearities by almost a factor 4.