刘艳平

教授 博士生导师 硕士生导师

入职时间:2017-03-20

所在单位:物理学院

职务:量子物理研究所副所长

学历:博士研究生毕业

办公地点:中南大学物理学院536房

性别:男

联系方式:邮箱:liuyanping@foxmail.com 电话:0731-88879148

学位:博士学位

主要任职:1. 湖南省侨联特聘专家委员会委员. 2. 中国科协和中国教育部“英才计划 ”导师。 3. 瑞典国际先进材料会士(Fellow of IAAM)。4. Nano Research ( Young Star Editors )。5. Nano Research 编委 (Editorial Board)。6. Nano-Micro Letters 青年编委。

毕业院校:新加坡南洋理工大学(NTU)/日本理化学研究所(RIKEN)

学科:物理学
电子科学与技术

学术荣誉:

2018  当选:  学术新人奖

2020  当选:  省高端人才

曾获荣誉:

〇2017年湖南省青年百人计划

〇2018年湖南省科技创新人才(优秀人才)

〇2018年湖南省十大杰出青年海归人物

〇2019年湖南省121创新人才工程(第三层次)

〇2020年湖南省杰出青年科学基金

〇2020年"芙蓉学者奖励计划"特聘教授

〇“中学生英才计划”十周年优秀导师

〇2021年Journal of Electronics Science and Technology执行编委

〇2023年Nano Research编委团队(Editorial Board)

〇2023年Nano-Micro Letters青年编委(Youth Editorial Board Member)

Valley-polarized local excitons in WSe2/WS2 vertical heterostructures

发布时间:2020-07-11

点击次数:

DOI码:10.1364/OE.399142

发表刊物:Opt. Express

摘要:Two-dimensional van der Waals heterostructures (vdWHs) are drawing growing interest in the investigation of their valley polarization properties of localized excitons. However, most of the reported vdWHs were made by micro-mechanical peeling, limiting their large-scale production and practical applications. Furthermore, the circular polarization characters of localized excitons in WSe2/WS2 heterostructures remain elusive. Here, a bidirectional-flow physical vapor deposition technique was employed for the synthesis of the WSe2/WS2 type-II vertical heterostructures. The interfaces of such heterojunctions are sharp and clean, making the neutral excitons of the constituent layers quenched, which significantly highlights the luminescence of the local excitons. The circular polarization of localized excitons in this WSe2/WS2 heterostructure was demonstrated by circularly-polarized PL spectroscopy. The degree of the circular polarization of the localized excitons was determined as 7.17% for σ- detection and 4.78% for σ+ detection. Such local excitons play a critical role in a quantum emitter with enhanced spontaneous emission rate that could lead to the evolution of LEDs. Our observations provide valuable information for the exploration of intriguing excitonic physics and the applications of innovative local exciton devices.

论文类型:期刊论文

通讯作者:Lingkai Cao, Jiahong Zhong, Juan Yu, Cheng Zeng, Junnan Ding, Chunxiao Cong, Xiaofei Yue, Zongwen Liu, and YP. Liu(刘艳平) *

文献类型:J

卷号:28

期号:15

页面范围:22135-22143

是否译文:

发表时间:2020-07-05

收录刊物:SCI

发布期刊链接:https://www.osapublishing.org/oe/abstract.cfm?uri=oe-28-15-22135

附件:

  • oe-28-15-22135.pdf

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