University of Tokyo Postdoctoral Fellow: Daehyun You

Daehyun You, Researcher

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Position
Postdoctoral Fellow,
Department of Nuclear Engineering and Management,
School of Engineering,
The University of Tokyo

Contact Information
E-Mail:daehyun●atto.t.u-tokyo.ac.jp
Please replace ●with @.

 

Research Theme

Measurement and ab initio calculation of photoemission delay

Career

Education

2015 March Bachelor of Science, Department of Chemistry, Faculty of Science, Tohoku University2017 March Master of Science, Department of Chemistry, Graduate School of Science, Tohoku University
2020 March PhD of Science, Department of Chemistry, Graduate School of Science, Tohoku University

Work Experiences

2019 April–present Research Fellow (DC2), JSPS

Grants

2018 April Grant-in-Aid for JSPS Research Fellows (DC2)

Journals

First Author

[3] D. You, H. Fukuzawa, Y. Luo, S. Saito, M. Berholts, T. Gaumnitz, M. Huttula, P. Johnsson, N. Kishimoto, H. Myllynen, A. Nemer, A. Niozu, M. Patanen, E. Pelimanni, T. Takanashi, S. Wada, N. Yokono, S. Owada, K. Tono, M. Yabashi, K. Nagaya, E. Kukk, and K. Ueda, “Multi-particle momentum correlations extracted using covariance methods on multiple-ionization of diiodomethane molecules by soft-X-ray free-electron laser pulses,” Physical Chemistry Chemical Physics, vol. 22, no. 5, p. 2648, Feb. 2020.

[2] D. You, K. Ueda, M. Ruberti, K. L. Ishikawa, P. A. Carpeggiani, T. Csizmadia, L. G. Oldal, H. N G, G. Sansone, P. K. Maroju, K. Kooser, C. Callegari, M. Di Fraia, O. Plekan, L. Giannessi, E. Allaria, G. De Ninno, M. Trovò, L. Badano, B. Diviacco, D. Gauthier, N. Mirian, G. Penco, P. R. Ribič, S. Spampinati, C. Spezzani, S. Di Mitri, G. Gaio, and K. C. Prince, “A detailed investigation of single-photon laser enabled Auger decay in neon,” New Journal of Physics, vol. 21, no. 11, p. 113036, Nov. 2019.

[1] D. You, H. Fukuzawa, Y. Sakakibara, T. Takanashi, Y. Ito, G. G. Maliyar, K. Motomura, K. Nagaya, T. Nishiyama, K. Asa, Y. Sato, N. Saito, M. Oura, M. Schöffler, G. Kastirke, U. Hergenhahn, V. Stumpf, K. Gokhberg, A. I. Kuleff, L. S. Cederbaum, and K. Ueda, “Charge transfer to ground-state ions produces free electrons,” Nature Communications, vol. 8, p. 14277, Jan. 2017.

Co-Author

[13] A. Niozu, Y. Kumagai, T. Nishiyama, H. Fukuzawa, K. Motomura, M. Bucher, K. Asa, Y. Sato, Y. Ito, T. Takanashi, D. You, T. Ono, Y. Li, E. Kukk, C. Miron, L. Neagu, C. Callegari, M. Di Fraia, G. Rossi, D. E. Galli, T. Pincelli, A. Colombo, S. Owada, K. Tono, T. Kameshima, Y. Joti, T. Katayama, T. Togashi, M. Yabashi, K. Matsuda, K. Nagaya, C. Bostedt, and K. Ueda, “Characterizing crystalline defects in single nanoparticles from angular correlations of single-shot diffracted X-rays,” IUCrJ, vol. 7, no. 2, p. 276, Mar. 2020.

[12] C. A. Stan, K. Motomura, G. Blaj, Y. Kumagai, Y. Li, D. You, T. Ono, A. Kalita, T. Togashi, S. Owada, K. Tono, M. Yabashi, T. Katayama, and K. Ueda, “The magnitude and waveform of shock waves induced by X-ray lasers in water,” Applied Sciences, vol. 10, no. 4, p. 1497, Feb. 2020.

[11] P. K. Maroju, C. Grazioli, M. Di Fraia, M. Moioli, D. Ertel, H. Ahmadi, O. Plekan, P. Finetti, E. Allaria, L. Giannessi, G. De Ninno, C. Spezzani, G. Penco, S. Spampinati, A. Demidovich, M. B. Danailov, R. Borghes, G. Kourousias, C. E. Sanches Dos Reis, F. Billé, A. A. Lutman, R. J. Squibb, R. Feifel, P. Carpeggiani, M. Reduzzi, T. Mazza, M. Meyer, S. Bengtsson, N. Ibrakovic, E. R. Simpson, J. Mauritsson, T. Csizmadia, M. Dumergue, S. Kühn, H. Nandiga Gopalakrishna, D. You, K. Ueda, M. Labeye, J. E. Bækhøj, K. J. Schafer, E. V. Gryzlova, A. N. Grum-Grzhimailo, K. C. Prince, C. Callegari, and G. Sansone, “Attosecond pulse shaping using a seeded free-electron laser,” Nature, vol. 578, no. 7795, p. 386, Feb. 2020.

[10] M. Di Fraia, O. Plekan, C. Callegari, K. C. Prince, L. Giannessi, E. Allaria, L. Badano, G. De Ninno, M. Trovò, B. Diviacco, D. Gauthier, N. Mirian, G. Penco, P. R. Ribič, S. Spampinati, C. Spezzani, G. Gaio, Y. Orimo, O. Tugs, T. Sato, K. L. Ishikawa, P. A. Carpeggiani, T. Csizmadia, M. Füle, G. Sansone, P. Kumar Maroju, A. D’Elia, T. Mazza, M. Meyer, E. V. Gryzlova, A. N. Grum-Grzhimailo, D. You, and K. Ueda, “Complete characterization of phase and amplitude of bichromatic extreme ultraviolet light,” Physical Review Letters, vol. 123, no. 21, p. 213904, Nov. 2019.

[9] A. Niozu, N. Yokono, T. Nishiyama, H. Fukuzawa, T. Sakurazawa, K. Matsuda, T. Takanashi, D. You, Y. Li, T. Ono, T. Gaumnitz, M. Schöffler, S. Grundmann, S. Wada, P. Carpeggiani, W. Q. Xu, X. J. Liu, S. Owada, K. Tono, T. Togashi, M. Yabashi, N. V. Kryzhevoi, K. Gokhberg, A. I. Kuleff, L. S. Cederbaum, K. Ueda, and K. Nagaya, “Electron spectroscopic study of nanoplasma formation triggered by intense soft x-ray pulses,” The Journal of Chemical Physics, vol. 151, no. 18, p. 184305, Nov. 2019.

[8] T. Nishiyama, Y. Kumagai, A. Niozu, H. Fukuzawa, K. Motomura, M. Bucher, Y. Ito, T. Takanashi, K. Asa, Y. Sato, D. You, Y. Li, T. Ono, E. Kukk, C. Miron, L. Neagu, C. Callegari, M. Di Fraia, G. Rossi, D. E. Galli, T. Pincelli, A. Colombo, T. Kameshima, Y. Joti, T. Hatsui, S. Owada, T. Katayama, T. Togashi, K. Tono, M. Yabashi, K. Matsuda, C. Bostedt, K. Nagaya, and K. Ueda, “Ultrafast structural dynamics of nanoparticles in intense laser fields,” Physical Review Letters, vol. 123, no. 12, p. 123201, Sep. 2019.

[7] R. Obaid, K. Schnorr, T. J. A. Wolf, T. Takanashi, N. G. Kling, K. Kooser, K. Nagaya, S. Wada, L. Fang, S. Augustin, D. You, E. E. B. Campbell, H. Fukuzawa, C. P. Schulz, K. Ueda, P. Lablanquie, T. Pfeifer, E. Kukk, and N. Berrah, “Photo-ionization and fragmentation of Sc3N@C80 following excitation above the Sc K-edge,” The Journal of Chemical Physics, vol. 151, no. 10, p. 104308, Sep. 2019.

[6] H. Fukuzawa, T. Takanashi, E. Kukk, K. Motomura, S. Wada, K. Nagaya, Y. Ito, T. Nishiyama, C. Nicolas, Y. Kumagai, D. Iablonskyi, S. Mondal, T. Tachibana, D. You, S. Yamada, Y. Sakakibara, K. Asa, Y. Sato, T. Sakai, K. Matsunami, T. Umemoto, K. Kariyazono, S. Kajimoto, H. Sotome, P. Johnsson, M. S. Schöffler, G. Kastirke, K. Kooser, X.-J. Liu, T. Asavei, L. Neagu, S. Molodtsov, K. Ochiai, M. Kanno, K. Yamazaki, S. Owada, K. Ogawa, T. Katayama, T. Togashi, K. Tono, M. Yabashi, A. Ghosh, K. Gokhberg, L. S. Cederbaum, A. I. Kuleff, H. Fukumura, N. Kishimoto, A. Rudenko, C. Miron, H. Kono, and K. Ueda, “Real-time observation of X-ray-induced intramolecular and interatomic electronic decay in CH2I2,” Nature Communications, vol. 10, no. 1, p. 2186, Dec. 2019.

[5] H. Fukuzawa, Y. Li, D. You, Y. Sakakibara, S. Yamada, Y. Ito, T. Takanashi, M. Oura, N. Saito, and K. Ueda, “Low-energy-electron production after 2p ionization of argon clusters,” Physical Review A, vol. 99, no. 4, p. 042505, Apr. 2019.

[4] E. Kukk, H. Myllynen, K. Nagaya, S. Wada, J. D. Bozek, T. Takanashi, D. You, A. Niozu, K. Kooser, T. Gaumnitz, E. Pelimanni, M. Berholts, S. Granroth, N. Yokono, H. Fukuzawa, C. Miron, and K. Ueda, “Coulomb implosion of tetrabromothiophene observed under multiphoton ionization by free-electron-laser soft-X-ray pulses,” Physical Review A, vol. 99, no. 2, p. 023411, Feb. 2019.

[3] R. B. Doak, G. Nass Kovacs, A. Gorel, L. Foucar, T. R. M. Barends, M. L. Grünbein, M. Hilpert, M. Kloos, C. M. Roome, R. L. Shoeman, M. Stricker, K. Tono, D. You, K. Ueda, D. A. Sherrell, R. L. Owen, and I. Schlichting, “Crystallography on a chip – without the chip: sheet-on-sheet sandwich,” Acta Crystallographica Section D Structural Biology, vol. 74, no. 10, p. 1000, Oct. 2018.

[2] Y. Kumagai, H. Fukuzawa, K. Motomura, D. Iablonskyi, K. Nagaya, S. Wada, Y. Ito, T. Takanashi, Y. Sakakibara, D. You, T. Nishiyama, K. Asa, Y. Sato, T. Umemoto, K. Kariyazono, E. Kukk, K. Kooser, C. Nicolas, C. Miron, T. Asavei, L. Neagu, M. S. Schöffler, G. Kastirke, X. Liu, S. Owada, T. Katayama, T. Togashi, K. Tono, M. Yabashi, N. V. Golubev, K. Gokhberg, L. S. Cederbaum, A. I. Kuleff, and K. Ueda, “Following the birth of a nanoplasma produced by an ultrashort hard-X-ray laser in xenon clusters,” Physical Review X, vol. 8, no. 3, p. 031034, Aug. 2018.

[1] T. Takanashi, K. Nakamura, E. Kukk, K. Motomura, H. Fukuzawa, K. Nagaya, S. Wada, Y. Kumagai, D. Iablonskyi, Y. Ito, Y. Sakakibara, D. You, T. Nishiyama, K. Asa, Y. Sato, T. Umemoto, K. Kariyazono, K. Ochiai, M. Kanno, K. Yamazaki, K. Kooser, C. Nicolas, C. Miron, T. Asavei, L. Neagu, M. Schöffler, G. Kastirke, X.-J. Liu, A. Rudenko, S. Owada, T. Katayama, T. Togashi, K. Tono, M. Yabashi, H. Kono, and K. Ueda, “Ultrafast Coulomb explosion of a diiodomethane molecule induced by an X-ray free-electron laser pulse,” Physical Chemistry Chemical Physics, vol. 19, no. 30, p. 19707, May 2017.

Reviews

[2] D. You, H. Fukuzawa, and K. Ueda, “Ne-Kr混合クラスターにおける基底状態のイオンへの電子移動による底エネルギー電子生成,” 放射光, vol. 32, p. 9, Jan. 2019.

[1] D. You, H. Fukuzawa, and K. Ueda, “Charge transfer to ground-state ions in Ne-Kr mixed clusters producing slow electrons,” SPring-8/SACLA Research Frontiers, vol. 2017, p. 48, Aug. 2018.

Presentations

Invited

[2] “Attosecond-precision coherent control experiment at FERMI,” The 20th International Symposium on Correlation, Polarization and Ionization in Atomic and Molecular Collisions (COPIAMC), Metz, France (August 2019)

[1] “Electron transfer to ground-state ions in loosely-bound systems producing slow electrons,” The International Symposium on (e,2e), Double Photo-ionization and Related Topics and the 19th International Symposium on Polarization and Correlation in Electronic and Atomic Collisions (E2EPOL), Palm Cove, Australia (August 2017)

Oral

[13] “Attosecond delays in photoionization studied with coherently controlled FEL at FERMI,” 第7回 日独6大学HeKKSaGOn学長会議, Heidelberg, Germany (September 2019)

[12] “Attosecond interferometry and coherent control at FERMI,” Mini Symposium on Ultrafast Molecular Dynamics, Sendai, Japan (April 2019)

[11] “Attosecond interferometry and coherent control at FERMI,” International Symposium on Ultrafast Electronic and Structural Dynamics, Sendai, Japan (March 2019)

[10] “Attosecond-precision coherent control experiment at FERMI,” 6th Ringberg Workshop on Structural Biology with FELs, Kreuth, Germany (February 2019)

[9] “Attosecond delays in photoionization studied with seeded FEL,” 第12回 分子科学討論会, Fukuoka, Japan (September 2018)

[8] “Attosecond delays in photoionization of Ne atoms, investigated with seeded FEL,” Mini Symposium on Electronic and Structural Dynamics, Sendai, Japan (July 2018)

[7] “Attosecond delays in photoionization studied with seeded FEL,” 第6回 日独6大学HeKKSaGOn学長会議, Osaka, Japan (April 2018)

[6] “Charge Transfer to Ground-state Ne Dications in Ne-Kr Mixed Clusters Producing Slow Electrons,” The 5th DUT-TU Joint Symposium on Chemistry, Sendai, Japan (September 2017)

[5] “Ne-Kr混合クラスターにおける基底状態イオンからの 低エネルギー電子生成過程,” 第11回分子科学討論会, Sendai, Japan (September 2017)

[4] “Ne-Kr混合クラスターにおける基底状態イオンへの電荷移動に伴う電子放出,” 第30回日本放射光学会年会, Kobe, Japan (January 2017)

[3] “Experimental identification for an efficient neutralization pathway of a dication in a cluster,” Tohoku University’s Chemistry Summer School 2016, Sendai, Japan (August 2016)

[2] “Experimental evidence for efficient neutralization of the ground-state ion in clusters,” The 39th International Conference on Vacuum Ultraviolet and X-ray Physics (VUVX2016), Zurich, Switzerland (July 2016)

[1] “Ne-Kr混合クラスターにおけるNe 1s光イオン化からの緩和過程の解明,” 物理学会第71回年次大会, Sendai, Japan (March 2016)

Poster

[11] “Attosecond delays in photoionization studied with seeded FEL at FERMI,” The 5th International Symposium on Intense Short Wavelength Processes in Atoms and Molecules (ISWAMP), Paris, France (July 2019)

[10] “Attosecond delays in photoionization studied with coherent-controlled FEL,” The XXXIst International Conference on Photonic, Electronic, and Atomic Collisions (ICPEAC), Deauville, France (July 2019)

[9] “位相制御FELを用いたアト秒スケールの光イオン化遅延時間計測,” 第3回 FRIS/DIARE Joint Workshop, Sendai, Japan (July 2018)

[8] “Evidence for Efficient Pathway to Produce Slow Electrons by Ground-state Dication in Clusters,” The 30th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC), Cairns, Australia (July 2017)

[7] “Evidence for Efficient Pathway to Produce Slow Electrons by Ground-state Dication in Cluster,” International Workshop on Photoionization & Resonant Inelastic X-ray Scattering (IWP-RIXS), Aussois, France (March 2017)

[6] “Ne-Kr混合クラスターにおける基底状態イオンへの電荷移動に伴う低エネルギー電子生成の観測,” 原子衝突学会第41回年会, Toyama, Japan (December 2016)

[5] “Ne-Krクラスターにおけるオージェ緩和に伴う基底状態イオンの中和過程の観測,” 第16回東北大学多元物質科学研究所研究発表会, Sendai, Japan (December 2016)

[4] “基底状態イオンへの電荷移動に伴う低エネルギー電子生成の観測,” FRIS/DIARE Joint Workshop, Sendai, Japan (November 2016)

[3] “Resonant Auger Decay Induced Interatomic Coulombic Decay in Ar Clusters,” 平成28年度化学系学協会東北大会, Iwaki, Japan (September 2016)

[2] “Ne-Kr混合クラスターにおけるNe 1s光イオン化からの緩和過程の計測,” 第15回東北大学多元物質科学研究所研究発表会, Sendai, Japan(December 2015)

[1] “Ne-Kr混合クラスターにおけるNe 1s光イオン化からの緩和過程の計測,” 平成27年度東北大学金属材料研究所共同利用ワークショップ, Sendai, Japan (December 2015)

Awards

2. 2020 March President’s Award, Tohoku University

1. 2016 December 11th Hatano Award, IMRAM, Tohoku University