Enhancement of the second plateau in solid high-order harmonic spectra by the two-color fields

被引：73

作者：

Li, Jin-Bin ^{[1
,2
]}

Zhang, Xiao ^{[3
,4
]}

Yue, Sheng-Jun ^{[1
,2
]}

Wu, Hong-Mei ^{[1
,2
]}

Hu, Bi-Tao ^{[1
,2
]}

Du, Hong-Chuan ^{[1
,2
]}

机构：

[1] Lanzhou Univ, Sch Nucl Sci & Technol, Lanzhou 730000, Peoples R China

[2] Lanzhou Univ, Minist Educ, Key Lab Special Funct Mat & Struct Design, Lanzhou 730000, Peoples R China

[3] Lanzhou Univ, Ctr Interdisciplinary Studies, Lanzhou 730000, Peoples R China

[4] Lanzhou Univ, Key Lab Magnetism & Magnet Mat MoE, Lanzhou 730000, Peoples R China

来源：

OPTICS EXPRESS | 2017年 / 25卷 / 16期

基金：

中国国家自然科学基金;

关键词：

GENERATION; PULSES; STATE;

D O I：

10.1364/OE.25.018603

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We theoretically investigate high-order harmonic generation (HHG) from solids in two-color fields. It is found that under the premise of maintaining the same amplitude, the intensity of the second plateau can be enhanced by two to three orders in a proper two-color field compared with the result in the monochromatic field with the same frequency as the driving pulse of the two-color field. This can be attributed to the fact that most excited electrons can be driven to the top of the first conduction band due to the larger vector potential of the two-color fields, which leads to the higher electron population of upper conduction bands. Moreover, we also find that isolated attosecond pulses can be generated from solids by choosing a proper two-color field that allows the electrons to reach the top of the first conduction band only once. This work provides a promising method for extending the range of solid HHG spectra in experiments. (C) 2017 Optical Society of America

引用

页码：18603 / 18613

页数：11

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