Direct Visualization of Deforming Atomic Wavefunction in Ultraintense High-Frequency Laser Pulses

Abstract

Interaction of intense laser fields with atoms distorts the bound-state electron cloud. Tracing the temporal response of the electron cloud to the laser field is of fundamental importance for understanding the ultrafast dynamics of various nonlinear phenomena of matter, but it is particularly challenging. Here, we show that the ultrafast response of the atomic electron cloud to the intense high-frequency laser pulses can be probed with the attosecond time-resolved photoelectron holography. In this method, an infrared laser pulse is employed to trigger tunneling ionization of the deforming atom. The shape of the deforming electron cloud is encoded in the hologram of the photoelectron momentum distribution. As a demonstration, by solving the time-dependent Schrödinger equation, we show that the adiabatic deforming of the bound-state electron cloud, as well as the nonadiabatic transition among the distorted states, is successfully tracked with attosecond resolution. Our work films the formation process of the metastable Kramers-Henneberger states in the intense high-frequency laser pulses. This establishes a novel approach for time-resolved imaging of the ultrafast bound-state electron processes in intense laser fields.

Ultrasensitive Detection and Cellular Photothermal Therapy via a Self‐Photothermal Modulation Biosensor

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Nonsequential double ionization of atoms driven by spatially inhomogeneous laser fields

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“…空间非均 匀激光场驱动下返回的高能电子不仅可能被母核 离子再俘获诱导高次谐波的产生, 也可能与母核离 子发生弹性碰撞诱导阈上电离, 还可能与母核离子 发生非弹性碰撞诱导NSDI. 然而, 空间非均匀激 光场下原子NSDI的研究还较少 [26,27] .…”

The Coulomb effect in nonsequential double ionization by counter-rotating two-color elliptical polarization fields

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