中国物理B ›› 2022, Vol. 31 ›› Issue (4): 44204-044204.doi: 10.1088/1674-1056/ac3ed0

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Orientation and ellipticity dependence of high-order harmonic generation in nanowires

Fan Yang(杨帆)1,2, Yinghui Zheng(郑颖辉)1,†, Luyao Zhang(张路遥)1, Xiaochun Ge(葛晓春)1, and Zhinan Zeng(曾志男)1,‡   

  1. 1 State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;
    2 Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
  • 收稿日期:2021-09-27 修回日期:2021-11-08 接受日期:2021-12-01 出版日期:2022-03-16 发布日期:2022-03-10
  • 通讯作者: Yinghui Zheng, Zhinan Zeng E-mail:yhzheng@siom.ac.cn;zhinan_zeng@mail.siom.ac.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 91950203, 11874374, 61690223, and 11774363), the Youth Innovation Promotion Association of the Chinese Academy Sciences, and the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB16).

Orientation and ellipticity dependence of high-order harmonic generation in nanowires

Fan Yang(杨帆)1,2, Yinghui Zheng(郑颖辉)1,†, Luyao Zhang(张路遥)1, Xiaochun Ge(葛晓春)1, and Zhinan Zeng(曾志男)1,‡   

  1. 1 State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;
    2 Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2021-09-27 Revised:2021-11-08 Accepted:2021-12-01 Online:2022-03-16 Published:2022-03-10
  • Contact: Yinghui Zheng, Zhinan Zeng E-mail:yhzheng@siom.ac.cn;zhinan_zeng@mail.siom.ac.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 91950203, 11874374, 61690223, and 11774363), the Youth Innovation Promotion Association of the Chinese Academy Sciences, and the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB16).

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摘要： It has been predicted that high-order harmonic generation (HHG) in nanowires has the potential to scale up photon energy and harmonic yield. However, studies on HHG in nanowires are still theoretical and no relevant experimental results have been reported as yet. Our experimental observation of the high-order harmonic in cadmium sulfide nanowires (CdS NWs) excited by a mid-infrared laser is, to our knowledge, the first of such study, and it verifies some of the theoretical results. Our experimental results show that the observed harmonics are strongest when a pump laser is parallel to the nanowires. Therefore, the theoretical prediction that harmonics are strongest under the nanowires parallel to the laser field is confirmed experimentally, and this can be used to determine the orientation of the nanowire. In addition, harmonics are sensitive to the variation of pump light ellipticities. This orientation dependence opens new opportunities to access the ultrafast and strong-field physics of nanowires.

关键词: high-order harmonic generation, orientation dependence, ellipticity dependence, nanowires

Abstract: It has been predicted that high-order harmonic generation (HHG) in nanowires has the potential to scale up photon energy and harmonic yield. However, studies on HHG in nanowires are still theoretical and no relevant experimental results have been reported as yet. Our experimental observation of the high-order harmonic in cadmium sulfide nanowires (CdS NWs) excited by a mid-infrared laser is, to our knowledge, the first of such study, and it verifies some of the theoretical results. Our experimental results show that the observed harmonics are strongest when a pump laser is parallel to the nanowires. Therefore, the theoretical prediction that harmonics are strongest under the nanowires parallel to the laser field is confirmed experimentally, and this can be used to determine the orientation of the nanowire. In addition, harmonics are sensitive to the variation of pump light ellipticities. This orientation dependence opens new opportunities to access the ultrafast and strong-field physics of nanowires.

Key words: high-order harmonic generation, orientation dependence, ellipticity dependence, nanowires

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

  • 42.65.Ky
78.67.Uh (Nanowires)