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李任恺
教授

博士,教授

电话:010-62771351

电子邮箱:lirk@tsinghua.edu.cn

  • 教育背景
  • 工作经历
  • 研究领域
  • 学术成果
  • 学术兼职
  • 奖励与荣誉

● 2005.08-2010.07 清华大学 核科学与技术 博士

● 2001.08-2005.07 清华大学 核工程与核技术 学士

● 2019.05-至今 清华大学 教授

● 2014.07- 2019.04 美国SLAC国家加速器实验室 Staff Scientist

● 2014.06- 2014.07 美国SLAC国家加速器实验室 Project Scientist

● 2012.04- 2014.05 美国加州大学洛杉矶分校 Assistant Researcher

● 2010.08- 2012.03 美国加州大学洛杉矶分校 Postdoctoral Employee

● 研究领域:加速器物理与技术

近年来主要的研究兴趣为高品质电子束的产生、操控、诊断和应用,包括:

  研发新的电子源,运用新的光阴极材料,通过对超快激光的时间-空间-频谱整形以及对电子束自身动态演化的控制,产生亮度更高、品质更好的电子束;

  研发先进的电子光学系统,以及基于微波、太赫兹、激光和新材料的器件,对电子束的相空间进行精确操控和诊断;

  直接利用高亮度的电子束(超快电子衍射和成像等),或由电子束产生的电磁辐射(太赫兹、EUV、X射线等),作为超高时间-空间-能量-动量分辨探针或先进制造工具,在量子材料、化学、生物、材料、能源、高能量密度物理等学科的基础研究和半导体芯片产业的制造与检测中开拓新的应用。

● 加速器物理与技术(部分)

  (1) S. P. Weathersby, G. Brown, M. Centurion, T. F. Chase, R. Coffee, J. Corbett, J. P. Eichner, J. C. Frisch, A. R. Fry, M. Gühr, N. Hartmann, C. Hast, R. Hettel, R. K. Jobe, E. N. Jongewaard, J. R. Lewandowski, R. K. Li*, A. M. Lindenberg, I. Makasyuk, J. E. May, D. McCormick, M. N. Nguyen, A. H. Reid, X. Shen, K. Sokolowski-Tinten, T. Vecchione, S. L. Vetter, J. Wu, J. Yang, H. A. Dürr and X. J. Wang, “Mega-electron-volt ultrafast electron diffraction at SLAC National Accelerator Laboratory”, Rev. Sci. Instrum. 86, 073702 (2015).

* Corresponding author

  (2) R. K. Li and P. Musumeci, “Single-Shot MeV Transmission Electron Microscopy with Picosecond Temporal Resolution”, Phys. Rev. Applied 2, 024003 (2014).

  Selected as an ‘Editors’ Suggestion’ article and highlighted by a ‘Synopsis’ article in Physics (http://physics.aps.org/synopsis-for/10.1103/PhysRevApplied.2.024003).

  (3) R. K. Li and X. J. Wang, “Femtosecond MeV Electron Energy-Loss Spectroscopy”, Phys. Rev. Applied 8, 054017 (2017).

  (4) R. K. Li, H. To, G. Andonian, J. Feng, A. Polyakov, C. M. Scoby, K. Thompson, W. Wan, H. A. Padmore, and P. Musumeci, “Surface Plasmon Resonance Enhanced Multiphoton Emission of High Brightness Electron Beams from a Nanostructured Copper Cathode”, Phys. Rev. Lett. 110, 074801 (2013).

  Selected as an ‘Editors’ Suggestion’ article and highlighted by a ‘Viewpoint’ article in Physics (http://physics.aps.org/articles/v6/17).

  (5) R. K. Li, C. X. Tang, Y. C. Du et al., “Experimental demonstration of high quality MeV ultrafast electron diffraction”, Rev. Sci. Instrum. 80, 083303 (2009).

  (6) R. K. Li, W. H. Huang, Y. C. Du et al., “Note: Single-shot continuously time-resolved MeV ultrafast electron diffraction”, Rev. Sci. Instrum. 81, 036110 (2010).

  (7) R. K. Li, P. Musumeci, H. A. Bender, N. S. Wilcox, and M. Wu, “Imaging single electrons to enable the generation of ultrashort beams for single-shot femtosecond relativistic electron diffraction”, J. Appl. Phys. 110, 074512 (2011).

  (8) R. K. Li, K. G. Roberts, C. M. Scoby, H. To, and P. Musumeci, “Nanometer emittance ultralow charge beams from rf photoinjectors”, Phys. Rev. Accel. Beams 15, 090702 (2012).

  (9) P. Musumeci, R. K. Li, and A. Marinelli, “Nonlinear longitudinal space charge oscillations in relativistic electron beams”, Phys. Rev. Lett. 106, 184801 (2011).

  (10) D. Cesar, J. Maxson, P. Musumeci, Y. Sun, J. Harrison, P. Frigola, F. H. O’Shea, H. To, D. Alesini, and R. K. Li, “Demonstration of Single-Shot Picosecond Time-Resolved MeV Electron Imaging Using a Compact Permanent Magnet Quadrupole Based Lens”, Phys. Rev. Lett. 117, 024801 (2016).

  (11) R. K. Li, M. C. Hoffmann, E. A. Nanni, S. H. Glenzer, M. E. Kozina, A. M. Lindenberg, B. K. Ofori-Okai, A. H. Reid, X. Shen, S. P. Weathersby, J. Yang, M. Zajac, and X. J. Wang, “Terahertz-based subfemtosecond metrology of relativistic electron beams”, Phys. Rev. Accel. Beams 22, 012803 (2019).

  (12) F. Sannibale, D. Filippetto, H. Qian, C. Mitchell, F. Zhou, T. Vecchione, R. K. Li, and J. Schmerge, “High-brightness beam tests of the very high frequency gun at the Advanced Photo-injector EXperiment test facility at the Lawrence Berkeley National Laboratory”, Rev. Sci. Instrum. 90, 033304 (2019).

  (13) X. H. Lu, C. X. Tang, R. K. Li, H. To, G. Andonian, and P. Musumeci, “Generation and measurement of velocity bunched ultrashort bunch of pC charge”, Phys. Rev. Accel. Beams 18, 032802 (2015).

  Selected as an ‘Editors’ Suggestion’ article.

  (14) P. Musumeci, R. K. Li, K. G. Roberts, and E. Chiadroni, “Controlling nonlinear longitudinal space charge oscillations for high peak current bunch train generation”, Phys. Rev. Accel. Beams 16, 100701 (2013).

  Selected as an ‘Editors’ Suggestion’ article.

  (15) C. M. Scoby, R. K. Li, E. Threlkeld, H. To, and P. Musumeci, “Single-shot 35 fs temporal resolution electron shadowgraphy”, Appl. Phys. Lett. 102, 023506 (2013).

  (16) C. M. Scoby, R. K. Li, and P. Musumeci, “Effect of an ultrafast laser induced plasma on a relativistic electron beam to determine temporal overlap in pump–probe experiments”, Ultramicroscopy 127, 14 (2013).

  (17) J. B. Rosenzweig, A. Cahill, B. Carlsten, G. Castorina, M. Croia, C. Emma, A. Fukusawa, B. Spataro, D. Alesini, V. Dolgashev, M. Ferrario, G. Lawler, R. K. Li, C. Limborg, J. Maxson, P. Musumeci, R. Pompili, S. Tantawi, O. Williams, “Ultra-high brightness electron beams from very-high field cryogenic radiofrequency photocathode sources”, Nucl. Instrum. Methods Phys. Res. A 909, 224 (2018).

  (18) X. Shen, R. K. Li, U. Lundström, T. J. Lane, A. H. Reid, S. P. Weathersby, and X. J. Wang, “Femtosecond mega-electron-volt electron micro-diffraction”, Ultramicroscopy 184, 172 (2018).

  (19) J. Duris, P. Musumeci, M. Babzien, M. Fedurin, K. Kusche, R. K. Li, J. Moody, I. Pogorelsky, M. Polyanskiy, J. B. Rosenzweig, Y. Sakai, C. Swinson, E. Threlkeld, O. Williams, and V. Yakimenko, “High-quality electron beams from a helical inverse free-electron laser accelerator”, Nat. Commun. 5, 4928 (2014).

  (20) P. Musumeci and R. K. Li, “High-Energy Time-Resolved Electron Diffraction”, Chapter 19 in Springer Handbook of Microscopy, edited by Peter W. Hawkes and John C.H. Spence (ISBN 978-3-030-00069-1, Springer Nature Switzerland AG 2019).

● 加速器应用(部分)

  (1) M. Z. Mo, Z. Chen, R. K. Li, M. Dunning, B. B. L. Witte, K. Baldwin, L. B. Fletcher, J. Kim, A. Ng, R. Redmer, A. H. Reid, P. Shekhar, X. Z. Shen, M. Shen, K. Sokolowski-Tinten, Y. Y. Tsui, Y. Q. Wang, Q. Zheng, X. J. Wang, and S. H. Glenzer, “Visualizing the heterogeneous to homogeneous melting transition with ultrafast electron diffraction”, Science 360, 1451 (2018).

  (2) J. Yang, X. Zhu, T. J. A. Wolf, Z. Li, J. P. F. Nunes, R. Coffee, J. Cryan, M. Gühr, K. Hegazy, T. F. Heinz, K. Jobe, R. K. Li, X. Shen, T. Veccione, S. Weathersby, K. J. Wilkin, C. Yoneda, Q. Zheng, T. J. Martinez, M. Centurion, X. J. Wang, “Imaging Conical Intersection Dynamics and photodissociation of CF3I Molecules with Ultrafast Gas Electron Diffraction”, Science 361, 64 (2018).

  (3) E. J. Sie, C. Nyby, C. D. Pemmaraju, S. J. Park, X. Shen, J. Yang, M. Hoffmann, B. K. Ofori-Okai, R. K. Li, A. H. Reid, S. Weathersby, E. Mannebach, N. Finney, D. Rhodes, D. Chenet, A. Antony, L. Balicas, J. Hone, T. P. Devereaux, T. Heinz, X. J. Wang, A. M. Lindenberg, “Time-varying shear strain as an ultrafast topological switch in a Weyl semimetal”, Nature 565, 61 (2019).

  (4) E. M. Mannebach, R. K. Li, K.-A. Duerloo, C. Nyby, P. Zalden, T. Vecchione, F. Ernst, A. H. Reid, T. Chase, X. Shen, S. Weathersby, C. Hast, R. Hettel, R. Coffee, N. Hartmann, A. R. Fry, Y. Yu, L. Cao, T. F. Heinz, E. J. Reed, H. A. Dürr, X. J. Wang, and A. M. Lindenberg, “Dynamic structural response and deformations of monolayer MoS2 visualized by femtosecond electron diffraction”, Nano Lett 15, 6889 (2015).

  (5) J. Yang, M. Guehr, X. Shen, R. K. Li, T. Vecchione, R. Coffee, J. Corbett, A. Fry, N. Hartmann, C. Hast, K. Hegazy, K. Jobe, I. Makasyuk, J. Robinson, M. S. Robinson, S. Vetter, S. Weathersby, C. Yoneda, X. J. Wang, and M. Centurion, “Diffractive Imaging of Coherent Nuclear Motion in Isolated Molecules”, Phys. Rev. Lett. 117, 153002 (2016).

  Selected as an ‘Editors’ Suggestion’ article and highlighted by a ‘Viewpoint’ article in Physics (http://physics.aps.org/articles/v9/112).

  (6) J. Yang, M. Guehr, T. Vecchione, M. S. Robinson, R. K. Li, N. Hartmann, X. Shen, R. Coffee, J. Corbett, A. Fry, K. Gaffney, T. Gorkhover, C. Hast, K. Jobe, I. Makasyuk, A. Reid, J. Robinson, S. Vetter, F. Wang, S. Weathersby, C. Yoneda, M. Centurion, and X. J. Wang, “Diffractive imaging of a rotational wavepacket in nitrogen molecules with femtosecond megaelectronvolt electron pulses”, Nat. Commun. 7, 11232 (2016).

  (7) X. Wu, L. Z. Tan, X. Shen, T. Hu, K. Miyata, M. T. Trinh, R. K. Li, R. Coffee, S. Liu, D. A. Egger, I. Makasyuk, Q. Zheng, A. Fry, J. S. Robinson, M. D. Smith, B. Guzelturk, H.I. Karunadasa, X. Wang, X.-Y. Zhu, L. Kronik, A. M. Rappe, and A. Lindenberg, “Light-induced picosecond rotational disordering of the inorganic sublattice in hybrid perovskites”, Sci. Adv. 3 (7), e1602388 (2017).

  (8) T. Konstantinova, J.D. Rameau, A.H. Reid, O. Abdurazakov, L. Wu, R. K. Li, X. Shen, G. Gu, Y. Huang, L. Rettig, I. Avigo, M. Ligges, J. Freericks, A. F. Kemper, H.A. Dürr, U. Bovensiepen, P.D. Johnson, X. J. Wang, and Y. Zhu, “Non-equilibrium electron and lattice dynamics of strongly correlated Bi2Sr2CaCu2O8+δ single crystals”, Sci. Adv. 4, eaap7427 (2018).

  (9) A. H. Reid, X. Shen, P. Maldonado, T. Chase, E. Jal, P. W. Granitzka, K. Carva, R. K. Li, J. Li, L. Wu, T. Vecchione, T. Liu, Z. Chen, D.J. Higley, N. Hartmann, R. Coffee, J. Wu, G.L. Dakowski, W. Schlotter, H. Ohldag, Y.K. Takahashi, V. Mehta, O. Hellwig, A. Fry, Y. Zhu, J. Cao, E.E. Fullerton, J. Stöhr, P. M. Oppeneer, X.J. Wang, and H.A. Dürr, “Beyond a phenomenological description of magnetostriction”, Nat. Commun. 9, 388 (2018).

  (10) M.-F. Lin, V. Kochat, A. Krishnamoorthy, L. Bassman, C. Weninger, Q. Zheng, X. Zhang, A. Apte, C. S. Tiwary, X. Shen, R. K. Li, R. Kalia, P. Ajayan, A. Nakano, P. Vashishta, F. Shimojo, X. J. Wang, D. M. Fritz, and U. Bergmann, “Ultrafast non-radiative dynamics of atomically thin MoSe2”, Nat. Commun. 8, 1745 (2017).

  (11) A. Zong, X. Shen, A. Kogar, L. Ye, C. Marks, D. Chowdhury, T. Rohwer, B. Freelon, S. Weathersby, R. K. Li, J. Yang, J. Checkelsky, X. J. Wang, N. Gedik, “Ultrafast manipulation of mirror domain walls in a charge density wave”, Sci. Adv. 4, eaau5501 (2018).

  (12) M. Z. Mo, S. T. Murphy, Z. Chen, P. Fossati, R. K. Li, Y. Q. Wang, X. J. Wang, and S. H.Glenzer, “Visualization of ultrafast melting initiated from radiation driven defects in solids”, Sci. Adv. 5, eaaw0392 (2019).

  (13) T. J. A. Wolf, D. M. Sanchez, J. Yang, R. M. Parrish, J. P. F. Nunes, M. Centurion, R. Coffee, J. P. Cryan, M. Gühr, K. Hegazy, A. Kirrander, R. K. Li, J. Ruddock, X. Shen, T. Veccione, S. P. Weathersby, P. M. Weber, K. Wilkin, H. Yong, Q. Zheng, X.J. Wang, M. P. Minitti, T. J. Martínez, “Imaging the Ultrafast Photoinduced Ring Opening of Cyclohexadiene by Electron Diffraction”, Nature Chemistry 11, 504 (2019).

  (14) A. Krishnamoorthy, M.-F. Lin, X. Zhang, C. Weninger, R. Ma, A. Britz, C. Sekhar Tiwary, V. Kochat, A. Apte, J. Yang, S. Park, R. K. Li, X. Shen, X. J. Wang, R. Kalia1, A. Nakano1, F. Shimojo, D. Fritz, U. Bergmann, P. Ajayan, and P. Vashishta, “Optical control of non-equilibrium phonon dynamics”, Nano Lett. 19, 4981 (2019).

  (15) A. Zong, P. E. Dolgirev, A. Kogar, E. Ergeçen, M. B. Yilmaz, Y.-Q. Bie, T. Rohwer, I-C. Tung, J. Straquadine, X. Wang, Y. Yang, X. Shen, R. K. Li, J. Yang, S. Park, M. C. Hoffmann, B. K. Ofori-Okai, M. E. Kozina, H. Wen, X. J. Wang, I. R. Fisher, P. Jarillo-Herrero, N. Gedik, “Dynamical slowing down in an ultrafast photo-induced phase transition”, Phy. Rev. Lett. 123, 097601 (2019).

  (16) K. Sokolowski-Tinten, R. K. Li, A. H. Reid, S. P. Weathersby, F. Quirin, T. Chase, R. Coffee, J. Corbett, A. Fry, N. Hartmann, C. Hast, R. Hettel, M. Horn von Hoegen, D. Janoschka, J. R. Lewandowski, M. Ligges, F. Meyer zu Heringdorf, X. Shen, T. Vecchione, C. Witt, J. Wu, H. A. Dürr, and X. J. Wang, “Thickness-dependent electron–lattice equilibration in laser-excited thin bismuth films”, New J. Phys. 17, 113047 (2015).

  (17) T. Konstantinova, L. Wu, M. Abeykoon, R. J. Koch, A. F. Wang, R. K. Li, X. Shen, J. Li, J. Tao, I. A. Zaliznyak, C. Petrovic, S. J. L. Billinge, X. J. Wang, E. S. Bozin and Y. Zhu, “Photoinduced dynamics of nematic order parameter FeSe”, Phys. Rev. B 99, 180102(R) (2019).

  (18) T. Chase, M. Trigo, A. H. Reid, R. K. Li, T. Vecchione, X. Shen, S. Weathersby, R. Coffee, N. Hartmann, D. A. Reis, X. J. Wang, and H. A. Dürr, “Ultrafast electron diffraction from nonequilibrium phonons in femtosecond laser heated Au films”, Appl. Phys. Lett. 108, 041909 (2016).

  (19) K. Sokolowski-Tinten, X. Shen, Q. Zheng, T. Chase, R. Coffee, M. Jerman, R. K. Li, M. Ligges, I. Makasyuk, M. Mo, A. H. Reid, B. Rethfeld, T. Vecchione, S. P. Weathersby, H. A. Dürr, and X. J. Wang, “Electron-lattice energy relaxation in laser-excited thin-film Au-insulator heterostructures studied by ultrafast MeV electron diffraction”, Struct. Dyn. 4, 054501 (2017).

  (20) L. Le Guyader, T. Chase, A. H. Reid, R. K. Li, D. Svetin, X. Shen, T. Vecchione, X. J. Wang, D. Mihailovic, and H. A. Dürr, “Stacking order dynamics in the quasi-two-dimensional dichalcogenide 1T-TaS2 probed with MeV ultrafast electron diffraction”, Struct. Dyn. 4, 044020 (2017).

● 项目评审人:美国能源部 Early Career Award项目, 美国能源部SBIR Phase I and Phase II 项目

● 期刊审稿人:Science Advances, Physical Review Letters, Physical Review Applied, Applied Physics Letters, New Journal of Physics, Structural Dynamics, Optics Letters, Physical Review Accelerators and Beams, Review of Scientific Instruments, Applied Optics, Nuclear Instruments and Methods Phys. Res. A等

● 2010年 优秀博士毕业生 清华大学

● 2015年 SLAC主任奖(SLAC Director’s Award) 美国SLAC国家加速器实验室

  • 地址:清华大学工程物理系(刘卿楼)
  • 邮编:100084
  • 电话:010-62785727
  • 邮箱:gwbgs@mail.tsinghua.edu.cn
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