报告题目:Optical investigation of 2D materials
报告人:于霆 教授
邀请人:程迎春 教授
报告时间:2022年6月15日(星期三)9:30
报告地点:科技D楼1903
摘要
Two-dimensional (2D) materials, such as graphene and monolayer transitional-metal-dichalcogenides (TMDs), have aroused great attention due to the underlying fundamental physics and the promising atomically-thin optoelectronic applications. Optical properties of these 2D materials are fundamentally interesting such as magneto-phonon resonance in graphene, patterned charge-phonon coupling in NbSe2 and strong excitonic emission in monolayer WS2. Meanwhile, development of practical optoelectronics based on 2D materials is very promising, which opens many opportunities for the next-generation light-emitting applications such as valley light-emitting diodes and on-chip vertical-cavity surface-emitting lasers (VCSELs). Here, we report observations of magneto-phonon coupling effects in graphene layers, collective charge density wave (CDW) phases in 2H-NbSe2, wealthy excitonic emission states of monolayer WS2, and 2D semiconductor lasing from monolayer WS2 embedded VCSELs. Overall, our studies provide many new understandings on fundamental light-matter interactions in atomically thin materials and pave ways to develop industrially attractive light-emitting applications based on 2D semiconductors.
个人简介
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于霆,武汉大学物理科学与技术学院教授,博士生导师,国家级人才项目入选者,国家重点研发计划“纳米前沿”重点专项首席科学家。2003年获新加坡国立大学博士学位,2003-2005新加坡千禧年博士后,2005年加入南洋理工,2017年获聘新加坡南洋理工大学正教授(终身职位),2020年回国加入武汉大学。于霆教授博士长期从事二维材料物性研究与性能调控,及其在微电子、光电子、光通讯和电化学储能等方面新型、高效器件的应用开发。尤其针对可用于新一代信息通信与存储的二维材料光学、光电特性等领域做出许多引领性工作。发表SCI论文300余篇,他引28,000多次,H因子93。