中国物理B ›› 2023, Vol. 32 ›› Issue (3): 37503-037503.doi: 10.1088/1674-1056/ac7f92

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Enhanced and tunable Imbert-Fedorov shift based on epsilon-near-zero response of Weyl semimetal

Ji-Peng Wu(伍计鹏)1,2, Yuan-Jiang Xiang(项元江)2, and Xiao-Yu Dai(戴小玉)2,†   

  1. 1 College of Railway Transportation, Hunan University of Technology, Zhuzhou 412007, China;
    2 College of Electrical and Information Engineering, Hunan University, Changsha 410082, China
  • 收稿日期:2022-05-14 修回日期:2022-07-05 接受日期:2022-07-08 出版日期:2023-02-14 发布日期:2023-02-21
  • 通讯作者: Xiao-Yu Dai E-mail:xiaoyudai@126.com
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 61875133 and 11874269).

Enhanced and tunable Imbert-Fedorov shift based on epsilon-near-zero response of Weyl semimetal

Ji-Peng Wu(伍计鹏)1,2, Yuan-Jiang Xiang(项元江)2, and Xiao-Yu Dai(戴小玉)2,†   

  1. 1 College of Railway Transportation, Hunan University of Technology, Zhuzhou 412007, China;
    2 College of Electrical and Information Engineering, Hunan University, Changsha 410082, China
  • Received:2022-05-14 Revised:2022-07-05 Accepted:2022-07-08 Online:2023-02-14 Published:2023-02-21
  • Contact: Xiao-Yu Dai E-mail:xiaoyudai@126.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 61875133 and 11874269).

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摘要： We theoretically investigate the reflected spatial Imbert-Fedorov (IF) shift of transverse-electric (TE)-polarized beam illuminating on a bulk Weyl semimetal (WSM). The spatial IF shift is enhanced significantly at two different frequencies close to the epsilon-near-zero (ENZ) frequency, where large values of reflection coefficients $|r_{\rm pp}| / | r_{\rm ss}|$ are obtained due to the ENZ response induced different rapid increasing trends of $|r_{\rm pp}|$ and $| r_{\rm ss}|$. Particularly, the tunable ENZ effect with tilt degree of Weyl cones and Fermi energy enables the enhanced spatial IF shift at different frequencies. The enhanced spatial IF shift also shows the adjustability of WSM thickness, incident angle and Weyl node separation. Our findings provide easy and available methods to enlarge and adjust the reflected IF shift of TE-polarized light with a WSM.

关键词: Imbert-Fedorov shift, Weyl semimetal, epsilon-near-zero, reflection

Abstract: We theoretically investigate the reflected spatial Imbert-Fedorov (IF) shift of transverse-electric (TE)-polarized beam illuminating on a bulk Weyl semimetal (WSM). The spatial IF shift is enhanced significantly at two different frequencies close to the epsilon-near-zero (ENZ) frequency, where large values of reflection coefficients $|r_{\rm pp}| / | r_{\rm ss}|$ are obtained due to the ENZ response induced different rapid increasing trends of $|r_{\rm pp}|$ and $| r_{\rm ss}|$. Particularly, the tunable ENZ effect with tilt degree of Weyl cones and Fermi energy enables the enhanced spatial IF shift at different frequencies. The enhanced spatial IF shift also shows the adjustability of WSM thickness, incident angle and Weyl node separation. Our findings provide easy and available methods to enlarge and adjust the reflected IF shift of TE-polarized light with a WSM.

Key words: Imbert-Fedorov shift, Weyl semimetal, epsilon-near-zero, reflection

中图分类号:  (Spin-orbit effects)

  • 75.70.Tj
78.20.Ci (Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))