Research directions

Scientific Research

Graphene plasmon and 2D nanomaterial’s optical properties


    Graphene plasmons have high compression ratios, great local optical field enhancement, and are electrically tunable (tunable from terahertz to mid-infrared). However, due to the single-atom-layer two-dimensional structure of graphene (each atom is in a surface state), graphene plasmons are sensitive to the environment and are easily affected by surface charge impurities, optical phonons, etc. on the supporting substrate. Our research is divided into three parts:

(1) High-performance graphene plasmons are realized through dielectric environment design, such as long life, wide frequency adjustable range, etc.;

(2) On the basis of high-performance graphene plasmons, plasmon-enhanced infrared spectroscopy is performed by utilizing its high local optical field enhancement;

(3) Novel optoelectronic properties of two-dimensional nanomaterial for van der Waals heterostructures based on graphene plasmons.

(4) Research on near-field optical instruments with high spatial resolution and characterization methods.

Representative Publications:

1. Hai Hu*, Renwen Yu, Debo Hu, Alexander McLeod, Pablo Alonso-González, Xiangdong Guo, Hanchao Teng, Chan Li, Na Chen, Xinzhong Chen, Ziheng Yao, Yunpeng Qu, Zhongjun Li, Jianing Chen, Zhipei Sun, Mengkun Liu, Javier Garcia de Abajo*, Xiaoxia Yang, Qing Dai*, Active control of micrometer plasmon propagation in suspended graphene, Nature Communications, 2022, 13: 1465

2. Yunpeng Qu#, Na Chen#, Hanchao Teng#, Hai Hu*, Jianzhe Sun, Renwen Yu, Debo Hu, Mengfei Xue, Chi Li, Bin Wu, Jianing Chen, Zhipei Sun, Mengkun Liu, Yunqi Liu, F. Javier García de Abajo, Qing Dai*, Tunable planar focusing based on hyperbolic phonon polaritons in α-MoO3, Advanced Materials, 2022, accepted

3. 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

4. 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

5. Wei Lyu, Hanchao Teng, Chenchen Wu, Xiaotao Zhang, Xiangdong Guo,* Xiaoxia Yang* and Qing Dai*. Anisotropic acoustic phonon polariton-enhanced infrared spectroscopy for single molecule detection. Nanoscale, 2021, 13, 12720

6. Cheng Luo, Xiangdong Guo, Hai Hu, Debo Hu, Chenchen Wu, Xiaoxia Yang*, Qing Dai*. Probing Polaritons in 2D Materials, Advanced Optical Materials , 2020, 1901416.

7. 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

8. 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

9. 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

10. 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

11. 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

12. Hu, HaiGuo, Xiangdong,Hu, Debo,Sun, Zhipei,Yang, Xiaoxia*,Dai, Qing*. Flexible and Electrically Tunable Plasmons in Graphene-Mica Heterostructures. Advanced Science . 2018, 5(8): 1800175

13. 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

14. 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

15. 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

16. 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

17. 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

18. 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