Fractional high-order harmonic combs and energy tuning by attosecond-precision split-spectrum pulse control
Fractional high-order harmonic combs and energy tuning by attosecond-precision split-spectrum pulse control
复制标题
通过阿秒精度分谱脉冲控制进行分数高阶谐波梳和能量调谐
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
T. Pfeifer
中科院分区：
文献类型：
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作者：
P. Raith;C. Ott;Christopher P. Anderson;A. Kaldun;K. Meyer;M. Laux;Yizhu Zhang;T. Pfeifer
我们通过应用一种通用的几周期脉冲波形控制方法对高次谐波的产生进行了实验控制：将单个宽带连续激光光谱分成两段，并施加亚飞秒相对时间延迟。对于一定的时间延迟，会产生分数高次谐波(非整数次谐波)，我们发现这是由于两个阿秒脉冲列的受控干扰造成的。对于由强分量和弱分量组成的非对称分裂谱，我们还观察到高次谐波随时滞变化的能量可调谐性。通过对整形激光脉冲峰值处的瞬时驱动频率的受控调制，可以定量地理解调谐机制。
We experimentally control high-order harmonic generation by applying a versatile few-cycle pulse-shape control method: splitting up a single broadband continuous laser spectrum into two sections and applying sub-femtosecond relative time delays. For certain time delays, fractional high-harmonic combs (noninteger harmonics) are generated which we find to result from the controlled interference of two attosecond pulse trains. We also observe time-delay-dependent energy-tunability of the high-order harmonics for an asymmetrically split spectrum consisting of a strong and a weak component. The tuning mechanism is quantitatively understood by the controlled modulation of the instantaneous driver frequency at the peak of the shaped laser pulse.
影响因子：
56.9
作者：
Wirth, A.;Hassan, M. Th.;Goulielmakis, E.
通讯作者：
Goulielmakis, E.