Optical response of van der Waals heterointerface by symmetry engineering

在过去的一年里，我专注于3R-MoS 2的体压电光伏效应。通过使3R-MoS 2应变，旋转对称性被破坏，并且我们期望出现面内偏振。因此，我们观察到了体压电光伏效应。体光伏（BPV）响应大大增强应变和BPV系数增加至少两个数量级的0.2%的应变。这项工作于2022年11月发表在Nature Nanotechnology上。去年，我还在华盛顿大学的Xiaodong Xu实验室进行了研究实习，在那里我学到了许多有用的设备制造和光学设置构建方面的技能。

In the past year, I focused on bulk piezophotovoltaic effect in 3R-MoS2. By straining 3R-MoS2, the rotational symmetry is broken, and we expect an in-plane polarization to arise. Thus, we observed the bulk piezophotovoltaic effect. The bulk photovoltaic (BPV) response is greatly enhanced by strain and the BPV coefficient increases at least two orders by 0.2% of strain. This work was published in Nature Nanotechnology in Nov 2022. Last year, I also carried out a research internship in Xiaodong Xu lab, University of Washington, where I learnt many useful skills in device fabrication and optical set-up construction.