太阳成集团tyc234cc

Layer-dependent optical properties of few-layer black phosphorus

来源:太阳成集团tyc234cc
报告题目   Layer-dependent optical properties of few-layer black phosphorus
报告人   Prof. YAN Hugen (晏湖根)
报告人单位   Department of Physics, Fudan University
报告时间   2018-12-17 10:00:00
报告地点   太阳成集团tyc234cc九楼会议室(9004)
主办单位   太阳成集团tyc234cc、国际功能材料量子设计中心(ICQD)
报告介绍
报告摘要:
  Few-layer black phosphorus is a newly emerged two-dimensional material. It has many interesting properties such as strong anisotropy and significant layer-dependence of the electronic structures. The bandgap of few-layer black phosphorus is in the infrared frequency range, bridging the gap of other 2D materials: zero bandgap graphene and visible frequency bandgap transition metal dichalcogenides. In this talk, I'll present our systematic infrared spectroscopic studies of few-layer black phosphorus, with layer thickness ranging from 2-15 layers. Each thickness black phosphorus has its characteristic IR spectrum, which can be served as a fingerprint. The layer-dependent exciton binding energies are determined from our high quality samples, which show the importance of quantum confinement and dielectric confinement. In addition, strain effect on few-layer black phosphorus will be discussed as well.
 
References:
 
G. Zhang, S. Huang, A. Chaves, C. Song, V. O. ?z?elik, T. Low and H. Yan, Infrared fingerprints of few-layer black phosphorus, Nature Communications 8, 14071 (2017)
Guowei Zhang, Andrey Chaves, Shenyang Huang, Fanjie Wang, Qiaoxia Xing, Tony Low, Hugen Yan.Determination of layer-dependent exciton binding energies in few-layer black phosphorus, Science Advances 4, eaap9977 (2018)
 
 报告人简介:
  晏湖根于2004年本科毕业于复旦大学物理系,2010年在哥伦比亚大学物理系取得博士学位,随后在IBM T. J. Watson 研究所从事博士后工作,于2015年初开始任复旦大学物理系研究员。主要擅长二维材料光谱学、等离激元学及纳米光学等方面的实验研究。

太阳成集团tyc234cc:相关文章

太阳成集团tyc234cc-44118太阳成城集团