Nakajima Takashi, Cormier E
Institute of Advanced Energy, Kyoto University, Kyoto, Japan.
Opt Lett. 2007 Oct 1;32(19):2879-81. doi: 10.1364/ol.32.002879.
By solving the time-dependent Schrödinger equation for the Cs atom, we find that, as long as the spectral bandwidth is sufficiently broad, the asymmetry of photoelectron ejection is strongly phase dependent and persists even when the chirped pulse duration becomes more than several cycles. The asymmetry survives even after the angle integration over the hemisphere, implying that the detection efficiency can be significantly improved. This counterintuitive and robust finding provides a simple way to measure the phase for both transform-limited and chirped pulses.
通过求解铯原子的含时薛定谔方程，我们发现，只要光谱带宽足够宽，光电子发射的不对称性就强烈依赖于相位，并且即使啁啾脉冲持续时间超过几个周期，这种不对称性依然存在。即使在半球上进行角度积分后，这种不对称性仍然存在，这意味着探测效率可以显著提高。这一违反直觉且稳健的发现为测量变换极限脉冲和啁啾脉冲的相位提供了一种简单方法。
