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Prof. Sheng Wang: Scanning Probe Microscopes: Principles and Applications in Probing Low-dimensional Materials (2021/11/30)

( 2021-11-23 )

题目

Scanning Probe Microscopes: Principles and Applications in Probing Low-dimensional Materials


报告人


Prof. Sheng Wang (王胜) 

Wuhan University


 

时间

2021年11月30日(星期二)下午2:00


地点

第五教学楼5403教室

报告人简介

王胜于2014年获中国科学技术大学理学学士学位,2020年获美国加州大学伯克利分校物理学博士学位,随后获得Director's Postdoc Fellowship在美国洛斯阿拉莫斯国家实验室从事博士后研究。2021年加入武汉大学物理科学与技术学院并开展纳米光学课题组的建设。主要研究方向是发展和结合多种前沿的先进光谱技术和扫描探针技术来表征和调控低维量子材料中一系列新奇的光学和电学特性以及探究光电特性与微观结构的复杂关联。研究对象主要包括碳纳米管、二维材料以及范德华异质结构等。

课题组主页:www.wangnanolab.com

报告摘要

Scanning probe microscopes have been a powerful tool for characterizing and manipulating low-dimensional quantum materials at the nanoscale. My talk on this topic consists of two sections. In the first section, I will give an introduction to the principles of versatile scanning probe techniques, including nanoelectrical, nanomechanical, nanooptical probing, and nanolithography. I will illustrate their capabilities and applicabilities using their applications in revealing a wealth of structure-property relationship of two-dimensional materials. In the second section, I will focus on the scanning near-field optical microscopy (SNOM), which realizes subdiffractional nano-imaging and nano-spectroscopy by integrating optical spectroscopy with scanning probe microscope. I will present our findings in carbon nanotube plasmonics using SNOM. We unravel quantum behaviors of plasmons in metallic and semiconducting carbon nanotubes, which contrasts starkly with conventional plasmons in metallic nanostructures. We further demonstrate control over carbon nanotube plasmons via their hybridization with graphene plasmons in a mixed-dimensional van der Waals heterostructure.




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