中国物理B ›› 2021, Vol. 30 ›› Issue (8): 87802-087802.doi: 10.1088/1674-1056/abf3b6

所属专题： SPECIAL TOPIC — Optical field manipulation

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Polarized photoluminescence spectroscopy in WS2, WSe2 atomic layers and heterostructures by cylindrical vector beams

Lijun Wu(吴莉君)1, Cuihuan Ge(葛翠环)1, Kai Braun1,2, Mai He(贺迈)1, Siman Liu(刘思嫚)1, Qingjun Tong(童庆军)1, Xiao Wang(王笑)1,†, and Anlian Pan(潘安练)3   

  1. 1 Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, School of Physics and Electronics, Hunan University, Changsha, Hunan 410082, China;
    2 Institute of Physical and Theoretical Chemistry and LISA+, University of Tübingen, Auf der Morgenstelle 18, 72076, Tübingen, Germany;
    3 College of Materials Science and Engineering, Hunan University, Changsha, Hunan 410082, China
  • 收稿日期:2021-02-04 修回日期:2021-03-20 接受日期:2021-03-31 出版日期:2021-07-16 发布日期:2021-08-02
  • 通讯作者: Xiao Wang E-mail:xiao_wang@hnu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 91850116, 51772084, 52022029, and U19A2090), Hunan Provincial Natural Science Foundation of China (Grant Nos. 2018RS3051 and 2018WK4004), and the Key Program of the Hunan Provincial Science and Technology Department, China (Grant No. 2019XK2001).

Polarized photoluminescence spectroscopy in WS2, WSe2 atomic layers and heterostructures by cylindrical vector beams

Lijun Wu(吴莉君)1, Cuihuan Ge(葛翠环)1, Kai Braun1,2, Mai He(贺迈)1, Siman Liu(刘思嫚)1, Qingjun Tong(童庆军)1, Xiao Wang(王笑)1,†, and Anlian Pan(潘安练)3   

  1. 1 Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, School of Physics and Electronics, Hunan University, Changsha, Hunan 410082, China;
    2 Institute of Physical and Theoretical Chemistry and LISA+, University of Tübingen, Auf der Morgenstelle 18, 72076, Tübingen, Germany;
    3 College of Materials Science and Engineering, Hunan University, Changsha, Hunan 410082, China
  • Received:2021-02-04 Revised:2021-03-20 Accepted:2021-03-31 Online:2021-07-16 Published:2021-08-02
  • Contact: Xiao Wang E-mail:xiao_wang@hnu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 91850116, 51772084, 52022029, and U19A2090), Hunan Provincial Natural Science Foundation of China (Grant Nos. 2018RS3051 and 2018WK4004), and the Key Program of the Hunan Provincial Science and Technology Department, China (Grant No. 2019XK2001).

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摘要： Due to the large exciton binding energy, two-dimensional (2D) transition metal dichalcogenides (TMDCs) provide an ideal platform for studying excitonic states and related photonics and optoelectronics. Polarization states lead to distinct light-matter interactions which are of great importance for device applications. In this work, we study polarized photoluminescence spectra from intralayer exciton and indirect exciton in WS2 and WSe2 atomic layers, and interlayer exciton in WS2/WSe2 heterostructures by radially and azimuthally polarized cylindrical vector laser beams. We demonstrated the same in-plane and out-of-plane polarization behavior from the intralayer and indirect exciton. Moreover, with these two laser modes, we obtained interlayer exciton in WS2/WSe2 heterostructures with stronger out-of-plane polarization, due to the formation of vertical electric dipole moment.

关键词: two-dimensional transition metal dichalcogenides, optical polarization, interlayer exciton, cylindrical vector beams

Abstract: Due to the large exciton binding energy, two-dimensional (2D) transition metal dichalcogenides (TMDCs) provide an ideal platform for studying excitonic states and related photonics and optoelectronics. Polarization states lead to distinct light-matter interactions which are of great importance for device applications. In this work, we study polarized photoluminescence spectra from intralayer exciton and indirect exciton in WS2 and WSe2 atomic layers, and interlayer exciton in WS2/WSe2 heterostructures by radially and azimuthally polarized cylindrical vector laser beams. We demonstrated the same in-plane and out-of-plane polarization behavior from the intralayer and indirect exciton. Moreover, with these two laser modes, we obtained interlayer exciton in WS2/WSe2 heterostructures with stronger out-of-plane polarization, due to the formation of vertical electric dipole moment.

Key words: two-dimensional transition metal dichalcogenides, optical polarization, interlayer exciton, cylindrical vector beams

中图分类号:  (Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures)

  • 78.67.-n
42.25.Ja (Polarization) 71.35.-y (Excitons and related phenomena)