Wigner time-frequency distribution of high-order harmonics

被引：33

作者：

Kim, JH ^{[1
]}

Lee, DG

Shin, HJ

Nam, CH

机构：

[1] Korea Adv Inst Sci & Technol, Dept Phys, Taejon 305701, South Korea

[2] Korea Adv Inst Sci & Technol, Coherent Xray Res Ctr, Taejon 305701, South Korea

来源：

PHYSICAL REVIEW A | 2001年 / 63卷 / 06期

关键词：

D O I：

10.1103/PhysRevA.63.063403

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We investigate the time-frequency characteristics of high-order harmonics generated in atomic gases by intense femtosecond laser pulses, using the Wigner distribution function. The dynamically induced chirp of high harmonics is calculated both quantum mechanically and semiclassically, and a good agreement between them is reached as long as the tunneling effect is properly taken into account. Using the time-frequency analysis, we demonstrate that the large harmonic blueshift observed experimentally is due mainly to the single-atom effect.

引用

页数：5

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