理学院“科学沙龙”系列学术报告
报告题目：Polaritons in van der Waals material α-MoO
报 告 人：Qiaoliang Bao （Institute of Energy Materials Science (IEMS), University of Shanghai for Science and Technology, Shanghai 200093, China; Department of Materials Science and Engineering, Monash University, Clayton, Victoria 3800, Australia）
报告地点：理科楼202物理系会议室
报告时间：2024年11月7日15:00
报告摘要：Here we update our recent progress on the observation of anisotropic and ultra-low-loss polariton propagation along the natural vdW material α-MoO3.[1] We will also present how the hyperbolic polaritons in α-MoO3 thin slabs are delicately manipulated by controlling the interlayer twist angle.[2] We experimentally observed tunable topological transitions from open (hyperbolic) to closed (elliptical) dispersion contours in twisted α-MoO3 bilayers at a photonic magic twist angle. We further demonstrated the manipulation and steering of the hyperbolic polaritons in this exotic material by chemical intercalation [3] and edge orientation [4], an important step for building polaritonic circuitry[5]. We also present our most recent progress on deep subwavelength imaging with a high resolution based on a biaxial van der Waals canalization lens.
References
[1]Nature, 2018, 562: 557.
[2]Nature, 2020, 582: 209.
[3]Nature Commun., 2020,11 :2646.
[4]Nature Commun., 2020,11:6086
[5]Nature Rev. Phys., 2022, 4 (9), 578-594.
报告人简介：
Dr. Qiaoliang Bao received his Ph. D degree from Department of Physics, Wuhan University. He has ever studied at Nanyang Technological University and worked as a postdoctoral fellow in National University of Singapore (2008-2012). He was appointed as a tenured Associate Professor at Department of Materials Science and Engineering, Monash University, Australia upon the award of ARC Future Fellowship in 2016. He was one of the 20 lead Chief Investigators of the ARC COE FLEET. He has published more than 270 refereed journal articles with more than 46,000 total citations and an H-index of 96 (Google Scholar). Dr. Bao was listed as Highly Cited (HiCi) researcher by Clarivate Analytics from 2018 to 2023. His research involves the investigation of waveguide-coupled 2D materials and devices, focusing on the effect of confined-space light-matter interactions on the transport of polaritons and the construction of emerging photonic circuitries for neuromorphic hardware.
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理学院
2024年11月6日
