中国物理B ›› 2019, Vol. 28 ›› Issue (11): 114205-114205.doi: 10.1088/1674-1056/ab47f7

所属专题: SPECIAL TOPIC — Strong-field atomic and molecular physics

• SPECIAL TOPIC—Strong-field atomic and molecular physics • 上一篇    下一篇

Role of Bloch oscillation in high-order harmonic generation from periodic structure

Lu Liu(刘璐), Jing Zhao(赵晶), Jian-Min Yuan(袁建民), Zeng-Xiu Zhao(赵增秀)   

  1. 1 Graduate School of China Academy of Engineering Physics, Beijing 100193, China;
    2 Department of Physics, College of Liberal Arts and Science, National University of Defense Technology, Changsha 410073, China
  • 收稿日期:2019-07-30 修回日期:2019-09-23 出版日期:2019-11-05 发布日期:2019-11-05
  • 通讯作者: Zeng-Xiu Zhao E-mail:zhaozengxiu@nudt.edu.cn
  • 基金资助:
    Project supported by the NSAF, China (Grant No. U1730449) and the National Natural Science Foundation of China (Grant Nos. 11904341, 11774322, 91850201, and 11874066).

Role of Bloch oscillation in high-order harmonic generation from periodic structure

Lu Liu(刘璐)1, Jing Zhao(赵晶)2, Jian-Min Yuan(袁建民)1,2, Zeng-Xiu Zhao(赵增秀)2   

  1. 1 Graduate School of China Academy of Engineering Physics, Beijing 100193, China;
    2 Department of Physics, College of Liberal Arts and Science, National University of Defense Technology, Changsha 410073, China
  • Received:2019-07-30 Revised:2019-09-23 Online:2019-11-05 Published:2019-11-05
  • Contact: Zeng-Xiu Zhao E-mail:zhaozengxiu@nudt.edu.cn
  • Supported by:
    Project supported by the NSAF, China (Grant No. U1730449) and the National Natural Science Foundation of China (Grant Nos. 11904341, 11774322, 91850201, and 11874066).

摘要: The high-order harmonic generation from a model solid structure driven by an intense laser pulse is investigated using the semiconductor Bloch equations (SBEs). The main features of harmonic spectrum from SBEs agree well with the result of the time-dependent Schrödinger equation (TDSE), and the cut-off energy can be precisely estimated by the recollision model. With increasing the field strength, the harmonic spectrum shows an extra plateau. Based on the temporal population of electron and the time-frequency analysis, the harmonics in the extra plateau are generated by the Bloch oscillation. Due to the ultrafast time response of the Bloch electron, the generated harmonics provide a potential source of shorter isolated attosecond pulse.

关键词: high-order harmonic generation, attosecond pulse, semiconductor Bloch equations, time-dependent Schrö, dinger equation

Abstract: The high-order harmonic generation from a model solid structure driven by an intense laser pulse is investigated using the semiconductor Bloch equations (SBEs). The main features of harmonic spectrum from SBEs agree well with the result of the time-dependent Schrödinger equation (TDSE), and the cut-off energy can be precisely estimated by the recollision model. With increasing the field strength, the harmonic spectrum shows an extra plateau. Based on the temporal population of electron and the time-frequency analysis, the harmonics in the extra plateau are generated by the Bloch oscillation. Due to the ultrafast time response of the Bloch electron, the generated harmonics provide a potential source of shorter isolated attosecond pulse.

Key words: high-order harmonic generation, attosecond pulse, semiconductor Bloch equations, time-dependent Schrö, dinger equation

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)