论文标题
通过子循环干扰调制侧带
Sideband Modulation by Sub-Cycle Interference
论文作者
论文摘要
我们在实验上和理论上表明，电子能光谱在高度强，圆形极化的两色激光场中的相对螺旋性很大程度上取决于一个意外的发现。所采用的反旋转两色（CRTC）场和共旋转的两色（Cortc）场都是在390 nm和780 nm的中心波长的循环极化激光脉冲的叠加（强度为780 nm）（强度$ I_ {390}/i_ {390}/i_ {7880}。对于CRTC场，测得的电子能谱由3.18 eV间隔的峰支配（对应于在390 nm的波长下光的光子能量）。对于Cortc场，我们观察到其他能量峰（边带）。使用我们的半古典轨迹模型，我们得出结论，侧带强度是由亚周期干扰调节的，该模型敏感地取决于圆形极化的两色场中的相对螺旋性。
We experimentally and theoretically show that the electron energy spectra strongly depend on the relative helicity in highly intense, circularly polarized two-color laser fields which is an unexpected finding. The employed counter-rotating two-color (CRTC) fields and the co-rotating two-color (CoRTC) fields are both a superposition of circularly polarized laser pulses at a central wavelength of 390 nm and 780 nm (intensitiy ratio $I_{390}/I_{780}\approx 250$). For the CRTC field, the measured electron energy spectrum is dominated by peaks that are spaced by 3.18 eV (corresponds to the photon energy of light at a wavelength of 390 nm). For the CoRTC field, we observe additional energy peaks (sidebands). Using our semi-classical, trajectory-based models, we conclude that the sideband intensity is modulated by a sub-cycle interference, which sensitively depends on the relative helicity in circularly polarized two-color fields.
