Nakajima Takashi, Watanabe Shuntaro
Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan.
Phys Rev Lett. 2006 Jun 2;96(21):213001. doi: 10.1103/PhysRevLett.96.213001.
We theoretically investigate the effects of the carrier-envelope phase of few-cycle laser pulses in the multiphoton ionization regime. For atoms with low ionization potential, total ionization yield barely exhibits phase dependence, as expected. However, population of some bound states clearly shows phase dependence. This implies that the measurement of the carrier-envelope phase would be possible through the photoemission between bound states without energy-and-angle-resolved photoelectron detection. The considered scheme could be particularly useful to measure the carrier-envelope phase for a light source without an amplifier, such as a laser oscillator, which cannot provide sufficient pulse energy to induce tunneling ionization.
我们从理论上研究了少周期激光脉冲的载波包络相位在多光子电离 regime 中的影响。对于电离势较低的原子，正如预期的那样，总电离产率几乎不表现出相位依赖性。然而，一些束缚态的布居明显表现出相位依赖性。这意味着通过束缚态之间的光发射，无需进行能量和角度分辨光电子检测，就有可能测量载波包络相位。所考虑的方案对于测量没有放大器的光源（如激光振荡器）的载波包络相位可能特别有用，因为激光振荡器不能提供足够的脉冲能量来诱导隧穿电离。
