High Harmonics with Controllable Polarization by a Burst of Linearly-Polarized Driver Pulses
High Harmonics with Controllable Polarization by a Burst of Linearly-Polarized Driver Pulses
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通过线性极化驱动脉冲突发实现可控极化的高次谐波
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
O. Cohen
中科院分区：
文献类型：
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作者：
O. Neufeld;E. Bordo;Avner Fleischer;O. Cohen
本文从理论上探讨了利用旋转偏振轴的线偏振脉冲群产生明亮的圆偏振和椭圆偏振高次谐波的方案。如果脉冲串由支持N重旋转对称的N个脉冲组成，则形成圆偏振谐波，其中N > 2。旋转包括脉冲的偏振轴可以产生具有从圆形到椭圆形到线性的可共同调谐的椭圆率的椭圆谐波。该方法保留了单周期，单原子和宏观物理的“标准”线偏振高次谐波产生，具有高产率和截止能量。我们调查的方法从时域的角度来看，以及一个光子的角度来看，并制定该计划的能量和自旋角动量守恒定律。我们发现，N = 4的情况下是最佳的这种方法，从而与椭圆光子的最高转换效率。该光源的新特性为螺旋超快光谱学和椭圆偏振光谱学提供了新的应用。
We theoretically explore a scheme for generation of bright circularly and elliptically polarized high-order harmonics by bursts of linearly polarized pulses with a rotating polarization axis. Circularly polarized harmonics are formed if the bursts are comprised of N pulses that uphold an N-fold rotational symmetry, for N > 2. Rotating the polarization axes of the comprising pulses can generate elliptical harmonics with a collectively tunable ellipticity, from circular through elliptic to linear. The method preserves the single-cycle, single-atom and macroscopic physics of ‘standard’ linearly polarized high harmonic generation, with a high yield and cutoff energy. We investigate the method from a time-domain perspective, as well as a photonic perspective, and formulate the energy and spin-angular momentum conservation laws for this scheme. We find that the case of N = 4 is optimal for this method, resulting with the highest conversion efficiency of elliptical photons. The new features of this source offer new applications to helical ultrafast spectroscopy and ellipsometry.
高次谐波产生率对驱动激光椭圆率的依赖性
影响因子：
2.9
作者：
M. Möller;Y. Cheng;S. D. Khan;B. Zhao;K. Zhao;M. Chini;G. G. Paulus;Z. Chang
通讯作者：
Z. Chang
用于产生圆偏振高次谐波的旋光准相位匹配。
影响因子：
3.6
作者：
Liu LZ
通讯作者：
Liu LZ