Our recent research interest includes (but not limited to)

• Ultrafast Spectroscopy

Ultrafast spectroscopy has been a powerful technique for investigating the electronic and vibration properties with up to sub 100 fs time resolution. It can potentially further the understanding regarding hot carrier dynamics, photo emission, coherent effects, dephasing phenomena, many body effects, nonequilibrium distribution function, resonant and non resonant tunneling and dynamics of coherent phonons in materials of different states and different dimensionalities. On the other hand, with the state of art nanofabrication techniques, 10s of nm resolution nano structure such as quantum confinement, super lattice, periodic potential wells et al. can be fabricated on the sample which provides additional freedom for spectroscopy studies. We are working on both making smart nano structures and characterization of those devices to study device physics mainly to assitant the optoelectronics development on novel materials, for example, graphene.

• CVD Growth of Graphene and Graphene Optoeletronics

Recently, graphene has received considerable attention, with early samples exhibiting remarkable physical, chemical and electronic properties and great promise for terahertz (THz) nanoelectronic and optoelectronic devices. CVD growth of graphene own the advantages of compatible with current CMOS technology and transferrable to any substrate over other graphene grwoth methods such as mechanical exfoliation and epitaxial desorption of Si from SiC. This makes it very promising for future graphene based device and graphene transparent electrode. Our group dedicates to the high quatlity graphene growth with chemical vapor deposition,device fabrication and spectroscopy charactertization.

• High Power THz and THz technology

Terahertz(THz) radiation, lies in the frequency gap between the infrared and microwaves,typicaly referred to as the frequencies from 100GHz to 30THz. Recent technological innocation in photonics and nanotechnology is now enabling THz research to be applied in many more sectors.It is finding use in information and communications technology;ultrafast computing; non-destructive evaluation;homeland security;quality control; biology and medical sciences et al. Our group dedicates on building table top high power THz source and use it in THz spectroscopy study of novel materials.

Here is a diagram of relations between  our recent research:

On the other hand, we have active collabrations with  groups in ICQM and all around world on some other intersting projects,click here for more details.

Major Faucilities

To be updated.....

Paper Publications

Submitted

54.Ruixue Zhang, Yiming Gong, Matthew W. Day, Dong Sun*, Steven Cundiff* "Radio frequency polarization modulation based on an optical frequency comb" 2020

53. Wei Lu, Zhibin Yang, Jianhua Hao, Dong Sun* "THz probe of photoexcited carrier dynamics of 2D InSe multilayer" 2020

52."All-optical modulation of second harmonic generation with excitons in monolayer transition-metal dichalcogenides" 2019

Published (*Corresponding Author,#Equal Contribution)

2020

51. Jing Liu, Fengnian Xia, Di Xiao,Javier García de Abajo, Dong Sun*, "Semimetal for High Performance Photodetection” Arxiv: 2004.11129 Nature Materials, Accepted (2020)

50.Jiawei Lai, Junchao Ma, Yinan Liu, Kenan Zhang, Xiao Zhuo, Jianhao Chen, Shuyun Zhou, Dong Sun* ”Photocurrent Response of Type-II Dirac Semimetal PtTe2" 2D Materials, In Press (2020)

49. Gu, Pingfan; Tan, Qinghai; Wan, Yi; Li, Ziling; Peng, Yuxuan; Lai, Jiawei; Ma, Junchao; Yao, Xiaohan; Yang, Shiqi; Yuan, Kai; Sun, Dong; Peng, Bo; Zhang, Jun ; Ye, Yu*"Photoluminescent quantum interference in a van der Waals magnet preserved by symmetry breaking" ACS Nano, 14,1003  (2020)

2019

48. Qinsheng Wang, Jingchuan Zheng, Yuan He, Jin Cao, Xin Liu, Maoyuan Wang, Junchao Ma, Jiawei Lai, Hong Lu, Shuang Jia, Dayu Yan, Y.-G. Shi, Junxi Duan, Junfeng Han, Wende Xiao, Jian-Hao Chen, Kai Sun, Yugui Yao*, Dong Sun*,"Robust edge photocurrent response on layered Type II Weyl semimetal WTe2", Arxiv: 1910.04624, Nature Communications 10,5736 (2019)

47.     Jiadong Zhou# , Xianghua Kong# , Chandra Mutyala# , Junhao Lin*, Frederic Le Goualher, Rui Xu, Xiaowei Wang, Yu Chen, Yao Zhou, Chao Zhu, Wei Lu, Fucai Liu, Bijun Tang, Zenglong Guo, Chao Zhu, Zhihai Cheng, Ting Yu, Kazu Suenaga, Dong Sun*, Wei Ji*, and Zheng Liu*, "Epitaxial synthesis of monolayer PtSe2 single crystal on MoSe2 with strong interlayer coupling", ACS Nano      13, 10929-10938   (2019)

46.Zhang, Rongjie; Ma, Xinli; An, Chunhua; Zhang, Daihua; Sun, Dong; Hu, Xiaodong; Liu, Jing*, "Self-powered photodetector based on vertical MoO3/MoS2 hetero-structure with gate tunable photo-response" 2D Materials 6, 035033 (2019)

45. Chunhua An,  Zhihao Xu, Wanfu Shen, Rongjie Zhang,  Zhaoyang Sun, Shuijing Tang, Yunfeng Xiao, Daihua Zhang, Dong Sun,  Xiaodong Hu, Chunguang Hu, Lei Yang* and Jing Liu* "The opposite anisotropic piezoresistive effect of ReS2", ACS Nano 13,3310  (2019)

44. Fan, Shuangqing; Qiao, Jingsi; Lai, Jiawei; Hei, Haicheng; Feng, Zhihong; Zhang, Qiankun; Zhang, Daihua; Wu, Sen; Hu, Xiaodong; Sun, Dong; Ji, Wei*; Liu, Jing* "A wet chemical method for black phosphorus thinning and passivation"  ACS Applied Materials & Interfaces, 11,9213 (2019)

43.Junchao Ma#, Ke Deng#, Lu Zheng#, Sanfeng Wu*, Zheng Liu*, Shuyun Zhou*, Dong Sun*, "Experimental Progress on Layered Topological Semimetals“，arXiv:1902.06874  Invited Review of 2D Materials, 6,032001 (2019)

42. Junchao Ma, Qiangqiang Gu, Yinan Liu, Jiawei Lai, Yu Peng, Xiao Zhuo, Zheng Liu, Jian-Hao Chen*, Ji Feng*, Dong Sun*, “Nonlinear Photoresponse of Type-II Weyl Semimetals” arXiv: 1806.08508 Nature Materials, 18,476 (2019) Selected as Cover Story.

41. Anyuan Gao, Jiawei Lai, Yaojia Wang, Zhen Zhu, Junwen Zeng , Geliang Yu, Naizhou Wang, Wenchao Chen, Tianjun Cao, Weida Hu, Dong Sun, Xianhui Chen, Feng Miao*, Yi Shi*, Xiaomu Wang*, "Observation of ballistic avalanche phenomena in nanoscale vertical InSe/BP heterostructures" Nature Nanotechnology 14, 217 (2019)

2018

40. Shuangqing Fan, Wanfu Shen, Jun Liu, Haicheng Hei, Ruixue Hu, Chunguang Hu, Daihua Zhang,  Xiaodong Hu,  Dong Sun,Jian-Hao Chen,   Wei Ji, and Jing Liu*, "Solution based properties tuning of black phosphorus", ACS Applied Materials & Interfaces 10, 39890–39897 (2018)

39. Gang Wang, Miao Zhang, Da Chen, Qinglei Guo, Xuefei Feng, Tianchao Niu, Xiaosong Liu, Ang Li, Jiawei Lai, Dong Sun, Zhi-Min Liao, Yongqiang Wang, Paul Chu, Guqiao Ding, Xiaoming Xie, Zengfeng Di*, and Xi Wang "Seamless lateral graphene p-n junctions formed by selective in situ doping for high-performance photodetectors", Nature Communications, 9, 5168 (2018)

38. Wei Lu, Jiwei Ling, Faxian Xiu, Dong Sun*, “Terahertz Probe of Photoexcited Carrier Dynamics in Dirac Semimetal Cd3As2", Phys Rev. B 98,104310 (2018)

37. Cao，Chuanwu; Liu, Xin; Ren, Xiao; Zeng, Xianzhe; Zhang, Kenan; Sun, Dong; Zhou, Shuyun; Wu, Yang; Li, Yuan; Chen, Jian-Hao “Barkhausen effect in the first order structural phase transition in type-II Weyl semimetal MoTe2” 2D Materials, 5, 044003 (2018)

36. Zhang, Rongjie; Xie, Zhijian; An, Chunhua; Fan, Shuangqing; Zhang, Qiankun; Wu, Sen; Xu, Linyan; Hu, Xiaodong; Zhang, Daihua; Sun, Dong; Chen, Jianhao; Liu, Jing, "Ultra-violet light induced persistent and degenerated doping in MoS2 for potential photo-controllable electronics applications" ACS Applied Materials & Interfaces 10 (33), 27840–27849 (2018)

35. Fan, Shuangqing; Shen, Wanfu; An, Chunhua; Sun, Zhaoyang; Wu, Sen; Xu, Linyan; Sun, Dong; Hu, Xiaodong; Zhang, Daihua; Liu, Jing, "Implementing lateral MoSe2 p-n homo-junction by efficient carrier type modulation" ACS Applied Materials & Interfaces 10, 26533 (2018)

34.  Lai, Jiawei; Liu, Yinan; Ma, Junchao; Zhuo, Xiao; Peng, Yu; Lu, Wei; Liu, Zheng; Chen, Jianhao*; Sun, Dong*,"Broadband Anisotropic Photo Response of the “Hydrogen Atom” Version Type-II Weyl Semimetal Candidate TaIrTe4" ACS Nano  12,4,4055 (2018)

33.  Yong Zhou,Jiawei Lai, Lingjian Kong,Junchao Ma ,Zhu Lin,Fang Lin,Rui Zhu,Jun Xu,Shiu-Ming Huang ,Dongsheng Tang,Song Liu,Zhensheng Zhang*,Zhi-Min Liao*,Dong Sun*, Dapeng Yu "Single crystalline SmB 6 nanowires for self-powered, broadband photodetectors covering mid-infrared" Applied Physics Letters, 112,162106 (2018)

32.Chuan Zhao#,Chandra Mutyala#, Wei Lu, Chenglong Zhang, Jiawei Lai, Shuang Jia, Dong Sun* "Anisotropic Visible Photoluminescence from Thermally Annealed Few-layer Black Phosphorus" Nanotechnology 29, (24), 245202 (2018)

31.Jiawei Lai, Xin Liu, Junchao Ma, Qinsheng Wang, Kenan Zhang, Xiao Ren, Yinan Liu, Qiangqiang Gu, Xiao Zhuo, Wei Lu, Yang Wu, Yuan Li, Ji Feng, Shuyun Zhou, Jian-Hao Chen*, Dong Sun*, "Anisotropic Broadband Photo Response of Layered Type-II Weyl semimetal MoTe2" Advanced Materials 30, (22),1707152 (2018)

30. Qiankun Zhang, Yinan Liu, Jiawei Lai, Shaomian Qi, Chunhua An, Yao Lu, Xuexin Duan, Wei Pang, Daihua Zhang, Dong Sun, Jian-hao Chen* and Jing Liu*, "Liquid phase mass production of air-stable black phosphorus/phospholipids nanocomposite with ultralow tunneling barrier" 2D Materials 5 (2), 025012  (2018)

29.Xuefeng Liu, Wei Lu, Xiaoying Zhou, Yang Zhou, Chenglong Zhang, Jiawei Lai, Shaofeng Ge, Chandra Sekhar Mutyala, Shuang Jia, Kai Chang,* and Dong Sun* "Dynamical Anisotropic Response of Black Phosphorus under Magnetic Field" 2D Materials 5 (2), 025010 (2018)

2017

28. Jiancui Chen,Zhihong Feng,Shuangqing Fan, Sigang Shi,Yuchen Yue, Wanyu Shen,Yuan Xie, Erxiu Wu, Chongling Sun, Jing Liu*, Hao Zhang, Wei Pang, Dong Sun,Wei Fang, Yiyu Feng, Sen Wu and Daihua Zhang*, "Contact Engineering of Molybdenum Ditelluride Field Effect Transistors through Rapid Thermal Annealing" ACS Appl. Mater. Interfaces 9, 30107 (2017)

27. Jin  Tao#, Yanyan Wang#,Yunjie Xiao,Pei Yao, Cheng Chen, Daihua Zhang,Wei Pang,Haitao Yang, Dong Sun, Zefang Wang*, Jing Liu* "One-step exfoliation and functionalization of graphene by hydrophobin for high performance water molecular sensing" Carbon 116, 695 (2017)

26. Dong Sun*, Jiawei Lai, Junchao Ma, Qinsheng Wang, Jing Liu "Review of Ultrafast Spectroscopy Studies of Valley Carrier in Two Dimensional Semiconducting Transitional Metal Dichalcogenides" Chinese Physics B 26, 037801 (2017) (Invited Review)

25. Wei Lu, Shaofeng Ge, Xuefeng Liu, Hong Lu, Caizhen Li, Jiawei Lai, Chuan Zhao,  Zhimin Liao, Shuang Jia, Dong Sun*, "Ultrafast Relaxation Dynamics of Photo-excited Dirac Fermion in Three Dimensional Dirac Semimetal Cadmium Arsenide" Physics Review B 95, 024303 (2017)

24. Q. S. Wang#, C.-Z. Li#, S. F. Ge, J.-G. Li, W. Lu, J. W. Lai, X. F. Liu, J. C. Ma, D.-P. Yu, Z.-M. Liao*, D. Sun*, "Ultrafast Broadband Photodetectors Based on Three-dimensional Dirac Semimetal Cd3As2" Nano Letters 17, 834 (2017)

2016

23. W. Lu, Y. D. Zhang, Z. S. Zhu, J. W. Lai, C. Zhao, X. F. Liu, J. Liu*, D. Sun*, "Thin Tungsten Telluride Layer Preparation by Thermal Annealing" Nanotechnology 27,414006 (2016)

22.Q.S. Wang, J.W. Lai, and D. Sun*, "Review of photo response in smiconductor transition metal dichalcogenides based photosensitive devices," Optical Materials Express 6 (7), 2313-2327 (2016) (Invited Review)

21. F.P. Zheng, C.Y. Cai, S.F. Ge, X.F. Zhang, X. Liu, H. Lu, Y.D. Zhang, J. Qiu, T. Taniguchi, K. Watanabe, S. Jia, J.S. Qi, J. H. Chen*, D. Sun* and J. Feng*, “On the quantum spin Hall gap of monolayer 1T'-WTe2,” Advanced Materials 28 (24), 4845-4851 (2016)

20. X. F. Liu, H. Y. Yu, Q. Q. Ji, Z. H. Gao, S. F. Ge, J. Qiu, Z. F. Liu, Y. F. Zhang, D. Sun* , “Ultrafast Terahertz Probe of Transient Evolution of Charged and Neutral Phase of Photoexcited Electron-hole Gas in Monolayer Semiconductor,” 2D Materials, 3, 014001 (2016)

19.J. J. Chen#, Q. S. Wang#, J. Meng, X. J. Ke, G. Van Tedeloo, Y. Q. Bie, J. K. Liu, K. H. Liu, Z. M. Liao*, D. Sun*, D. P. Yu* “ Photovoltaic Devices Based on Graphene Vertical Homojunctions with Asymmetical Metal Contacts ,” ACS Nano, 9，8851 (2015)

18.M. Mihnev, J. Tolsma, C. Divin, D. Sun, R. Asgari, M. Polini, C. Berger, W. de Heer, A. Macdonald, T. Norris*, “ Electronic Cooling via Interlayer Coulomb Coupling in Multiplayer Epitaxial Graphene ,” Nature Communications, 6, 8105 (2015)

17. S. F. Ge ,  C. K. Li ,  Z. M. Zhang ,  C. L. Zhang ,  Y. D. Zhang ,  J. Qiu ,  Q. S. Wang ,  J. K. Liu ,  S. Jia ,  J. Feng *,  D. Sun* , “Dynamical Evolution of Anisotropic Response in Black Phosphorus under Ultrafast Photoexcitation,” Nano Letters , 15 ,4650 (2015)

2014

16.S. F. Ge, X.F. Liu, X. F. Qiao, Q. S. Wang, Z. Xu, J. Qiu, P. H. Tan, J. M. Zhao, D. Sun* , “ Coherent Longitudinal Acoustic Phonon Approaching THz Frequency in Multilayer Molybdenum Disulphide ,” Scientific Reports 4 ,5722 (2014)

15.Y. Yan, Z. M. Liao*,X. M. Ke, G. V. Tendeloo, Q. S. Wang, D. Sun , W. Yao, S. Y. Zhou ,L. Zhang, H. C. Wu, D. P. Yu*, “ Topological Surface State Enhanced Photothermoelectric Efffect in Bi2Se3 Nanoribbons ,” Nano Letters , 14 , 4389 (2014)

14.  L. Yang, D. Zhong, J. Y. Zhang, Z. P. Yan, S. F. Ge, P. W. Du*, J. Jiang, D. Sun* , X. J. Wu, Z. Y.Fan, S. A. Deyah, B. Xiang*,“ Optical Properties of Metal-Molybdenum Disulfide Hybrid Nanosheets and Their Application for Enhanced Photocatalytic Hydrogen Evolution ,” ACS Nano , 8 ,6979 (2014)

2013

13. Q. S. Wang#, S. F. Ge#, X. F. Li, J. Qiu, Y. X. Ji, J. Feng, D. Sun* , “ Valley Carrier Dynamics in Monolayer Molybdenum Disulfide from Helicity-Resolved Ultrafast Pump–Probe Spectroscopy ,” ACS Nano 7 , 11087-11093 (2013)

Before 2012

12.T. S. Kasırga, D. Sun , J. H. Park, J. M. Coy, Z. Fei, X. D. Xu*, D. H. Cobden*, “ Photoresponse of a strongly correlated material determined by scanning photocurrent microscopy ,” Nature Nanotechnology, 7 , 723 (2012)

11.T. Winzer, A. Knorr, M. Mittendorff, S. Winnerl, M. B. Lien, D. Sun , T. B. Norris, M. Helm, E Malic*,“ Absorption saturation in optically excited graphene ,”  Applied Physics Letters , 101, 221115 (2012)

10.D. Sun , G. Aivazian, A. M. Jones, J. S. Ross, W. Yao, D. Cobden, X. D. Xu*, “ Ultrafast hot-carrier-dominated photocurrent in graphene ,” Nature Nanotechnology 7 , 114-118 (2012)

9.  D. Sun , J. Rioux, J. E. Sipe, Y. Zou, M. T. Mihnev, C. Berger, W. A. de Heer, P. N. First, T. B. Norris*, “ Evidence for interlayer electronic coupling in multilayer epitaxial graphene from polarization-dependent coherently controlled photocurrent generation ,” Physical Review B 85 , 165427 (2012)

8. D. Sun , C. Divin, M. T. Mihnev, T. Winzer, E. Malic, A. Knorr, J. E. Sipe, C. Berger, W. A. de Heer, P. N. First, TB Norris*, “ Current relaxation due to hot carrier scattering in graphene ,” New Journal of Physics 14 , 105012 (2012)

7. D. Sun , C. Divin, C. Berger, W. A. de Heer, P. N. First, T. B. Norris*, “ Hot carrier cooling by acoustic phonons in epitaxial graphene by ultrafast pump ‐ probe spectroscopy ,” Physica Status solidi (c) , 8 ,1194 (2011)

6. D. Sun , C. Divin, C. Berger, W. A. de Heer, P.N. First, T. B. Norris*, “ Spectroscopic Measurement of Interlayer Screening in Multilayer Epitaxial Graphene ,” Physical Review Letters 104 , 136802 (2010)

5. D. Sun , C. Divin, J. Rioux, J. E. Sipe, C. Berger, W. A. de Heer, P. N. First, T. B. Norris*, “ Coherent control of ballistic photocurrents in multilayer epitaxial graphene using quantum interference ,” Nano Letters 10 , 1293-1296 (2010)

3. D. Sun , Z. K. Wu, C. Divin, X. Li, C. Berger, W. A. de Heer, P. N. First, T. B. Norris*, “ Ultrafast relaxation of excited Dirac fermions in epitaxial graphene using optical differential transmission spectroscopy ,” Physical Review Letters 101 , 157402 (2008)

3. D. Sun , P. C. Ku*, “ Slow light using P-doped semiconductor heterostructures for high-bandwidth nonlinear signal processing ,” Journal of Lightwave Technology, 26 , 3811-3817 (2008)

2. J. Cheng, Y. Wu, X. D. Xu, D. Sun , D. G. Steel*, A. S. Bracker, D. Gammon, W. Yao, L. J. Sham, “ Spin relaxation in charged quantum dots measured by coherent optical phase modulation spectroscopy ,” Solid State Communications, 140 , 381 (2006)

1. M. Y. Ye*, D. Sun , Y. S. Zhang*, G. C. Guo*, “ Entanglement-changing power of two-qubit unitary operations ,” Physical Review A , 70 , 022326 (2004)