| WTe2 在室温下的红外纳米成像 |
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| 引用本文： | 罗国语,代珍兵,李志强,王冲,晏湖根,于白茹. WTe2 在室温下的红外纳米成像[J]. 四川大学学报(自然科学版), 2019, 56(6): 1093-1096 |
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| 作者姓名： | 罗国语 代珍兵 李志强 王冲 晏湖根 于白茹 |
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| 作者单位： | 四川大学物理学院,四川大学物理学院,四川大学物理科学与技术学院,复旦大学应用表面物理国家重点实验室,复旦大学应用表面物理国家重点实验室,四川大学物理学院 |
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| 摘 要： | 本文用扫描散射近场光学显微镜(s-SNOM)在室温下研究了碲化钨(WTe_2)的近场光学响应,利用有限偶极模型计算了WTe_2样品与金刚石基底的近场散射信号比,发现观测结果并不能完全由块材所描述,从而推测出样品表面具有与块材无耦合作用的WTe_2纳米薄层,并对在样品边缘发现的很强的亮纹做出了可能的解释.这个工作为今后对拓扑材料的光学研究提供了参考.
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| 关 键 词： | 碲化钨；拓扑材料；近场光学；边缘态 |
| 收稿时间： | 2019-04-07 |
| 修稿时间： | 2019-04-17 |
Infrared nanoimaging of WTe2 at room temperature |
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| LUO Guo-Yu,DAI Zhen-Bing,LI Zhi-Qiang,WANG Chong,YAN Hu-Gen and YU Bai-Ru. Infrared nanoimaging of WTe2 at room temperature[J]. Journal of Sichuan University (Natural Science Edition), 2019, 56(6): 1093-1096 |
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| Authors: | LUO Guo-Yu DAI Zhen-Bing LI Zhi-Qiang WANG Chong YAN Hu-Gen YU Bai-Ru |
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| Affiliation: | College of Physics, Sichuan University,College of Physics, Sichuan University,College of Physics, Sichuan University,State Key Laboratory of Applied Surface Physics, Fudan University,State Key Laboratory of Applied Surface Physics, Fudan University,College of Physics, Sichuan University |
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| Abstract: | We use scattering scanning near field optical microscopy to investigate the near field response of tungsten ditelluride(WTe2). By using finite-dipole model we calculate the scattered signal ratio of sample to substrate and found that it can not be fully described by bulk property. This difference is most likely contributed to the decoupled layer on the bulk WTe2.Then we give possible explanations to the bright fringe at the sample edge. This work provides a reference for the optical research of topological materials in the future. |
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