Generation of an extreme ultraviolet supercontinuum with a multicycle chirped laser and a static electric field

doi:10.1088/1674-1056/21/11/114209

中国物理B ›› 2012, Vol. 21 ›› Issue (11): 114209-114209.doi: 10.1088/1674-1056/21/11/114209

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

Generation of an extreme ultraviolet supercontinuum with a multicycle chirped laser and a static electric field

张刚台^a, 白婷婷^b, 张美光^a

a Department of Physics and Information Technology, Baoji University of Arts and Sciences, Baoji 721016, China;
b Department of Mathematics, Baoji University of Arts and Sciences, Baoji 721013, China

收稿日期:2012-04-10 修回日期:2012-05-17 出版日期:2012-10-01 发布日期:2012-10-01
基金资助:
Project supported by the Science Foundation of Baoji University of Arts and Sciences, China (Grant Nos. ZK10122, ZK11061, ZK11135, ZK11060, and ZK1032) and the Education Committee Natural Science Foundation of Shaanxi Province, China (Grant No. 2010JK405).

Generation of an extreme ultraviolet supercontinuum with a multicycle chirped laser and a static electric field

Zhang Gang-Tai (张刚台)^a, Bai Ting-Ting (白婷婷)^b, Zhang Mei-Guang (张美光 )^a

a Department of Physics and Information Technology, Baoji University of Arts and Sciences, Baoji 721016, China;
b Department of Mathematics, Baoji University of Arts and Sciences, Baoji 721013, China

Received:2012-04-10 Revised:2012-05-17 Online:2012-10-01 Published:2012-10-01
Contact: Zhang Gang-Tai E-mail:gtzhang79@163.com
Supported by:
Project supported by the Science Foundation of Baoji University of Arts and Sciences, China (Grant Nos. ZK10122, ZK11061, ZK11135, ZK11060, and ZK1032) and the Education Committee Natural Science Foundation of Shaanxi Province, China (Grant No. 2010JK405).

摘要/Abstract

摘要： We theoretically present a method for generating an ultrabroad extreme ultraviolet (XUV) supercontinuum by using the combination of a multicycle chirped laser and a static electric field. At a low laser intensity, the spectral cutoff is extended to the 495th order harmonic, and the bandwidth of the supercontinuum spectrum is broadened to 535 eV. At a high laser intensity, the harmonic cutoff is enlarged to the 667th order, and the supercontinuum covering a bandwidth of 1035 eV is generated. In these two cases, the long quantum path is removed, and the short quantum path is selected. Especially for the relatively high laser intensity, an isolated 23-attosecond pulse with a bandwidth of about 170.6 eV is directly obtained. Finally, we also analyze the influences of the chirp parameter and the duration of the chirped pulse as well as the static field strength on the supercontinuum.

关键词: high-order harmonic, attosecond pulse generation, supercontinuum, combined field

Abstract: We theoretically present a method for generating an ultrabroad extreme ultraviolet (XUV) supercontinuum by using the combination of a multicycle chirped laser and a static electric field. At a low laser intensity, the spectral cutoff is extended to the 495th order harmonic, and the bandwidth of the supercontinuum spectrum is broadened to 535 eV. At a high laser intensity, the harmonic cutoff is enlarged to the 667th order, and the supercontinuum covering a bandwidth of 1035 eV is generated. In these two cases, the long quantum path is removed, and the short quantum path is selected. Especially for the relatively high laser intensity, an isolated 23-attosecond pulse with a bandwidth of about 170.6 eV is directly obtained. Finally, we also analyze the influences of the chirp parameter and the duration of the chirped pulse as well as the static field strength on the supercontinuum.

Key words: high-order harmonic, attosecond pulse generation, supercontinuum, combined field

中图分类号: (Frequency conversion; harmonic generation, including higher-order harmonic generation)

42.65.Ky

32.80.Rm (Multiphoton ionization and excitation to highly excited states) 42.65.Re (Ultrafast processes; optical pulse generation and pulse compression)

张刚台, 白婷婷, 张美光 . Generation of an extreme ultraviolet supercontinuum with a multicycle chirped laser and a static electric field[J]. 中国物理B, 2012, 21(11): 114209-114209.

Zhang Gang-Tai (张刚台), Bai Ting-Ting (白婷婷), Zhang Mei-Guang (张美光 ). Generation of an extreme ultraviolet supercontinuum with a multicycle chirped laser and a static electric field[J]. Chin. Phys. B, 2012, 21(11): 114209-114209.

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Generation of an extreme ultraviolet supercontinuum with a multicycle chirped laser and a static electric field

Generation of an extreme ultraviolet supercontinuum with a multicycle chirped laser and a static electric field

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