袁龙  (特任教授)

                                                                                    科学问题：

1. 如何研究二维材料电荷和能量随时间和空间的动态演化过程？

2. 如何发展具有高时空分辨能力的新型表征手段？

                                                                                      超快显微成像技术

超快成像具有200 fs和300 nm的时间和空间分辨能力用于直接研究二维材料激发态随时间和空间演化的动力学过程。

利用超快泵浦探测技术直接观测到激子在不同时间尺度下的扩散情况并研究相关机制

代表性研究论文：

1. Long Yuan et al. Strong Dipolar Repulsion of One-Dimensional Interfacial Excitons in Monolayer Lateral Heterojunctions，ACS Nano 2023, 17, 16, 15379–15387

2. Long Yuan et al. Manipulation of Exciton Dynamics in Single-Layer WSe2 Using a Toroidal Dielectric Metasurface, Nano Letters, 2021, 21, 23, 9930–9938.

3. Long Yuan et al. Twist-Angle-Dependent Interlayer Exciton Diffusion in WS2-WSe2 Heterobilayers, Nature Materials, 2020, 19, 617-623.

4. Long Yuan et al. Photocarrier Generation from Interlayer Charge-Transfer Transitions in WS2-Graphene Heterostructures, Science Advances,2018, 4, e1700324.

5. Tong Zhu#, Long Yuan# et al. Highly Mobile Charge-Transfer Excitons in Two-Dimensional Tetracene-WS2 Heterostructures, Science Advances,2018, 4, eaao3104. (#co-first author)

6. Long Yuan et al. Exciton Dynamics, Transport, and Annihilation in Atomically Thin 2D Semiconductor, Journal of Physical Chemistry Letters, 2017, 8, 3371–3379

7. Long Yuan et al. Exciton Dynamics and Annihilation in WS2 2D Semiconductor, Nanoscale, 2015, 7, 7402-7408.