We present a numerical investigation on the impact of the Coulomb interaction in the spiderlike photoelectron momentum distributions (PMDs) of a hydrogen atom ionized by an intense laser pulse. We have shown, by integrating analytical correction terms into the standard semiclassical rescattering model (SRM) to formulate the Coulomb analytically-corrected SRM (AC-SRM), that the interference fringes manifest a systematic shift along the transverse momentum direction upon considering the Coulomb action. A Coulomb correction to the SRM model has rarely been reported before. Analyses are made by varying physical quantities such as the carrier frequency and initial transverse velocity of the ionized electron. In particular, we decipher the impact of the Coulomb interaction with the classical-action phase map scheme, and demonstrate that this effect is more pronounced for smaller momenta in the spiderlike PMDs. It is proven that the presented AC-SRM is simple and effective in accounting for the Coulomb effect, as an alternative correction due to the Coulomb interaction to the standard SRM theory. Also, our phase map scheme is shown to be more powerful than the plain interference fringes in interrogating the Coulomb effect, especially for the first interference minimum. We anticipate that the present AC-SRM can be useful in investigating other strong field processes where the Coulomb interaction is considered.

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Cascade reactions have always had an irreplaceable position in biocatalysis. In this work, we are inspired by the cascade reactions catalyzed by natural enzymes and combining the peroxidase mimetic activity of metal organic frameworks (MOF) nanosheets and the glucose oxidation mimetic enzyme activity of gold nanoparticles (AuNPs) constitutes a dual nanozyme mimetic cascade reaction. AuNPs/Zn-TCPP nanosheets with dual mimetic enzyme activities were prepared by in situ reduction to generate AuNPs on the surface of 2D MOF. And used to further detect the content of hydrogen peroxide or glucose.

Tunneling ionization of atoms is the basis of many phenomena and techniques, which requires people of a comprehensive understanding of this crucial physical process. Recent experiments have proved the existence of the nonzero initial longitudinal momentum spread at the tunnel exit. However, the initial longitudinal velocity was usually set to zero in the adiabatic regime. In this article, we numerically study the mapping of the initial longitudinal velocity to the spiderlike photoelectron momentum distributions in hydrogen atom by deploying the semiclassical rescattering model and the time-dependent Schrödinger equation. Nonzero longitudinal initial velocity, either an offset or an offset distribution, is considered in the semiclassical rescattering model. Longitudinal and transverse cut-plots of the photoelectron momentum distributions are employed for discussion. The final longitudinal momentum of the electron is found to be sensitive to the initial longitudinal velocity, which offers us a method of determining the information of the initial longitudinal velocity from a photoelectron momentum distribution according to this linear relationship. We unveil that either an offset or an offset distribution for the initial longitudinal velocity can perfectly reproduce the same spiderlike PMDs. The semiclassical results are backed by the full quantum simulation. It is anticipated that more precise investigation is mandatory in deepening the knowledge of the initial longitudinal velocity in strong field ionization of atoms.