简介：
石墨烯等离激元具有高的压缩比和极大的局域光场增强，并且具有电学可调性（从太赫兹到中红外频段可调）。但是由于石墨烯的单原子层二维结构（每一个原子都处于表面态），因此石墨烯等离激元对环境敏感，容易受支撑基底上的表面电荷杂质、光学声子等影响。我们的研究分为三个部分：
（1）通过介电环境设计来实现高性能的石墨烯等离激元，如实现长寿命、宽频率可调范围等；
（2）在高性能石墨烯等离激元的基础上，利用其高局域光场增强性质进行增强光谱检测；
（3）基于石墨烯等离激元的二维纳米材料范德华异质结构的新型光电性能研究。
（4）高空间分辨近场光学仪器及表征方法研究。
代表性论文：
1. Weiliang Ma#, Guangwei Hu#, Debo Hu#, Runkun Chen, Tian Sun, Xinliang Zhang *, Qing Dai *, Ying Zeng, Andrea Alù*, Cheng-Wei Qiu*, Peining Li*. Ghost hyperbolic surface polaritons in bulk anisotropic crystals. Nature. 2021, 596: 362-373
2. Ning Li#, Xiangdong Guo#, Xiaoxia Yang*, Ruishi Qi, Tianyu Qiao, Yifei Li, Ruochen Shi, Yuehui Li, Kaihui Liu, Zhi Xu, Lei Liu, F. Javier García de Abajo, Qing Dai*, En-Ge Wang, and Peng Gao*, Direct observation of highly confined phonon polaritons in 3 suspended monolayer hexagonal boron nitride. Nature Materials. 2021, 20(1): 43-48
3. Xiangdong Guo, Ruina Liu, Debo Hu, Hai Hu, Zheng Wei, Rui Wang, Yunyun Dai, Yang Cheng, Ke Chen, Kaihui Liu, Guangyu Zhang, Xing Zhu, Zhipei Sun,* Xiaoxia Yang,* and Qing Dai*。 Efficient All-Optical Plasmonic Modulators with Atomically Thin Van Der Waals Heterostructures, Advanced Materials, 2020.
4. Cheng Luo, Xiangdong Guo, Hai Hu, Debo Hu, Chenchen Wu, Xiaoxia Yang*, Qing Dai*. Probing Polaritons in 2D Materials, Advanced Optical Materials , 2020, 1901416.
5. Baoxin Liao, Xiangdong Guo, Debo Hu, Feng Zhai, Hai Hu, Ke Chen, Cheng Luo, Mengkun Liu, Xiaoxia Yang*, Qing Dai*. A Multibeam Interference Model for Analyzing Complex Near-Field Images of Polaritons in 2D van der Waals Microstructures. Advanced Functional Materials , 2019, 29: 1904662
6. Hai Hu#, Xiaoxia Yang#, Xiangdong Guo, Kaveh Khaliji, Sudipta Romen Biswas, F. Javier García de Abajo, Tony Low*, Zhipei Sun*, Qing Dai*. Gas identification with graphene plasmons. Nature Communications . 2019, 10: 1131
7. Debo Hu, Ke Chen, Xinzhong Chen, Xiangdong Guo, Mengkun Liu,* and Qing Dai*. Tunable Modal Birefringence in a Low-Loss Van Der Waals Waveguide. Advanced Materials . 2019, 31(27): 1807788
8. Xiangdong Guo, Hai Hu, Debo Hu, Baoxin Liao, Ke Chen, Lei Liu, Xing Zhu, Xiaoxia Yang*, Qing Dai*, High-efficiency modulation of coupling between different polaritons in an in-plane graphene/hexagonal boron nitride heterostructure, Nanoscale , 2019,11, 2703-2709
9. Wu Chen-Chen, Guo Xiang-Dong, Hu Hai, Yang Xiao-Xia*, Dai Qing*. Graphene plasmon enhanced infrared spectroscopy. Acta Physica Sinica , 2019, 68(14): 148103
10. Hu, Hai，Guo, Xiangdong，Hu, Debo，Sun, Zhipei，Yang, Xiaoxia*，Dai, Qing*. Flexible and Electrically Tunable Plasmons in Graphene-Mica Heterostructures. Advanced Science . 2018, 5(8): 1800175
11. Debo Hu, Xiaoxia Yang, Chi Li, Ruina Liu, Ziheng Yao, Hai Hu, Stephanie N. Gilbert Coeder. Jianing Chen, Zhipei Sun, Mengkun Liu*, Qing Dai*. Probing optical anisotropy of nanometer-thin van der waals microcrystals by near-field imaging. Nature Communications . 2017, 8(1): 1471
12. Hai Hu, Baoxing Liao, Xiangdong Guo, Debo Hu, Xiaofen Qiao, Ning Liu, Ruina Liu, Ke Chen, Bing Bai, Xiaoxia Yang*, and Qing Dai*. Large-Scale Suspended Graphene Used as a Transparent Substrate for Infrared Spectroscopy. Small . 2017, 13(25): 1603812
13. Xiangdong Guo, Hai Hu, Xing Zhu, Xiaoxia Yang*, Qing Dai*. Higher order Fano graphene metamaterials for nanoscale optical sensing. Nanoscale . 2017, 9(39): 14998-15004
14. Hai Hu#, Xiaoxia Yang#, Feng Zhai, Debo Hu, Ruina Liu, Kaihui Liu*, Zhipei Sun*, Qing Dai*. Far-field nanoscale infrared spectroscopy of vibrational fingerprints of molecules with graphene plasmons. Nature Communications . 2016, 7: 12334
15. Yibing Zhao, Hai Hu, Xiaoxia Yang*, Dongpeng Yan*, Qing Dai*. Tunable Electronic Transport Properties of 2D Layered Double Hydroxide Crystalline Microsheets with Varied Chemical Compositions. Small . 2016, 12(33): 4471-4476
16. Xiaoxia Yang , Feng Zhai , Hai Hu , Debo Hu , Ruina Liu , Shunping Zhang , Mengtao Sun, Zhipei Sun*, Jianing Chen*, and Qing Dai*. Far-field spectroscopy and near-field optical imaging of coupled plasmon-phonon polaritons in two-dimensional van der Waals heterostructures. Advanced Materials , 2016, 28(15): 2931-2938
