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《科学前沿报告会》 第217期

科学前沿报告会(217)

报告题目

High harmonic generation in the combined XUV and infrared laser fields

报 告 人

何峰,  上海交通大学物理系

报告地点

物理楼中212

报告时间

2013年1月2日下午3:00-5:00

联 系 人

彭良友(65027)

报告摘要

The high harmonic generation (HHG) for He+ exposed to combined XUV and infrared laser fields is studied by numerically solving the time dependent Schrodinger equation. After the electron tunnels out and gains energy from the infrared laser field, extra XUV photons may be absorbed during the electron and parent ion recombination, contributing multiple cutoffs separated by XUV photon energies in the HHG spectrum. This new scenario is authenticated by analyzing the HHG in the time-frequency representation, and the power scaling of the cutoffs’ intensities as a function of XUV intensities. This new picture is a supplement to the three-step model for HHG.

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