Son, Sang-Kil, Ph.D.

Senior Scientist, Center for Free-Electron Laser Science (CFEL)
Deutsches Elektronen-Synchrotron (DESY)
Notkestraße 85
22607 Hamburg, Germany

Personal information vCard
Research interests
Theoretical atomic, molecular, and optical physics
Electronic structure in extreme conditions
X-ray free-electron laser (XFEL)-driven science
Strong-field physics from optical to x-ray regimes

Research highlights | Keywords
xatom
XATOM: all about x-ray atomic physics
xmolecule
XMOLECULE: molecular black hole
MAD
XFEL gets MAD
IPD
IPD in dense plasmas
VFD
New development of numerical grid-based methods
strong-field
Strong-field multiphoton processes in polyatomic molecules
frequency-comb
Frequency comb structure and coherent control
superconducting qubit
Multiphoton quantum interference in a superconducting qubit
Research skills
  • Code development for XATOM/XMOLECULE: integrated toolkits for X-ray and atomic/molecular physics
  • Code development for TDVFD: time-dependent Voronoi-cell finite difference method for polyatomic molecules in strong laser fields
  • Code development for density functional theory (DFT), time-dependent density functional theory (TDDFT), generalized pseudospectral (GPS) method, and time-dependent generalized pseudospectral (TDGPS) method
  • Scientific programming with Fortran 77/90 and math libraries
    Application programming with C, C++, and shell scripting
    Web programming with PHP/MySQL and Javascript
  • Computational quantum chemistry packages: Gaussian, GAMESS, ACES II, Molfdir, HyperChem, and octopus

Employment
Jan. 2014 ~ present    Senior Scientist, CFEL, DESY, Germany
Jun. 2010 ~ Dec. 2013    Post-Doctoral Fellow, CFEL, DESY, Germany
Advisor: Prof. Dr. Robin Santra

Education
Aug. 2003 ~ Dec. 2009 Ph.D. in Physical Chemistry, University of Kansas, United States (Research/Teaching Assistantship)
Advisor: Watkins Distinguished Prof. Shih-I Chu
New Development of Theoretical and Computational Methods for Probing Strong-Field Multiphoton Processes, Ph.D. Thesis, University of Kansas (2009) [bib][pdf][slide][abstract]
Mar. 1997 ~ Feb. 1999 M.S. in Physical Chemistry, KAIST, Korea (Full Scholarship from Government)
Advisor: Prof. Yoon Sup Lee
Two-component calculations for polyatomic hydrides and fluorides containing superheavy elements 113 and 114, M.S. Thesis, KAIST (1999) [bib][pdf][abstract]
Mar. 1993 ~ Feb. 1997 B.S. in Chemistry, KAIST, Korea (Full Scholarship from Government)

Selected publications | All publications | Listed with thumbnails | Listed by journals
[Son09a]
Phys. Rev. A 80, 011403(R) (2009)
[Son11e]
Phys. Rev. Lett. 107, 218102 (2011)
[Jurek16]
J. Appl. Cryst. 49, 1048 (2016)
[Rudenko17]
Nature 546, 129 (2017)
[Rudek18]
Nat. Commun. 9, 4200 (2018)
  1. Sang-Kil Son and Shih-I Chu, Multielectron effects on the orientation dependence and photoelectron angular distribution of multiphoton ionization of CO2 in strong laser fields, Phys. Rev. A 80, 011403(R) (2009) [bib][pdf][abstract][link]
  2. Sang-Kil Son, Henry N. Chapman, and Robin Santra, Multiwavelength anomalous diffraction at high x-ray intensity, Phys. Rev. Lett. 107, 218102 (2011) [bib][pdf][abstract][link]
  3. Zoltan Jurek, Sang-Kil Son, Beata Ziaja, and Robin Santra, XMDYN and XATOM: versatile simulation tools for quantitative modeling of X-ray free-electron laser induced dynamics of matter, J. Appl. Cryst. 49, 1048–1056 (2016) [special issue on free-electron laser software] [bib][abstract][link]
  4. Artem Rudenko, Ludger Inhester, Kota Hanasaki, Xiang Li, Seyyed J. Robatjazi, et al., Femtosecond response of polyatomic molecules to ultra-intense hard X-rays, Nature 546, 129–132 (2017) [bib][abstract][link][link]
  5. Benedikt Rudek, Koudai Toyota, Lutz Foucar, Benjamin Erk, Rebecca Boll, et al., Relativistic and resonant effects in the ionization of heavy atoms by ultra-intense hard X-rays, Nat. Commun. 9, 4200 (2018) [bib][pdf][abstract][link]
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Find my publications in [ Google Scholar | ResearchGate | ResearcherID | ORCID | Dimensions ]

Selected talks | All talks
[Son12g]
UDIM (2012)
[Son14d]
RPHDM (2014)
[Son15a]
BioXFEL (2015)
[Son15c]
ISWAMP3 (2015)
[Son16c]
GIST (2016)
  1. Sang-Kil Son, Henry N. Chapman, and Robin Santra, Multiwavelength anomalous diffraction at high x-ray intensity in Ultrafast Dynamic Imaging of Matter (Banff, Canada, July 1-3, 2012) [oral presentation] [bib][pdf][slide][abstract][link]
  2. Sang-Kil Son, Robert Thiele, Zoltan Jurek, Beata Ziaja, and Robin Santra, Quantum-mechanical calculation of ionization potential lowering in dense plasmas in Radiative Properties of Hot Dense Matter (Vienna, Austria, September 29-October 3, 2014) [oral presentation] [bib][slide][abstract][link]
  3. Sang-Kil Son, Phasing with electronic radiation damage at high x-ray intensity in BioXFEL STC 2nd Annual International Conference (Ponce, Puerto Rico, January 14-16, 2015) [invited talk] [bib][slide][abstract][link]
  4. Sang-Kil Son, Multiphoton multiple ionization dynamics of atoms and molecules at high x-ray intensity in International Workshop on Intense-field Short-wavelength Atomic and Molecular Processes (Hamburg, Germany, July 18-20, 2015) [invited talk] [bib][slide][abstract][link]
  5. Sang-Kil Son, What happens to atoms and molecules during x-ray free-electron laser pulses? in Physics and Photon Science Colloquium (Department of Physics and Photon Science, GIST, Gwangju, Korea, October 18, 2016) [invited talk] [bib][pdf][slide][abstract][link]
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[ Show all talks | Show invited talks only ]

Selected posters | All posters
[Son13d]
CFEL symposium (2013)
[Son12b]
Users' Meeting (2012)
[Son14]
Users' Meeting (2014)
[Son15b]
Users' Meeting (2015)
[Son19]
Users' Meeting (2019)
  1. Sang-Kil Son, Henry N. Chapman, and Robin Santra, Multiwavelength anomalous diffraction at high x-ray intensity in European XFEL and HASYLAB Users' Meeting (DESY, Hamburg, Germany, January 25-27, 2012) [poster] [bib][poster][abstract][link]
  2. Sang-Kil Son and Robin Santra, XATOM: an integrated toolkit for X-ray and atomic physics in 3rd CFEL Symposium 2013 (CFEL, Timmendorfer Strand, Germany, October 1-3, 2013) [poster] [bib][poster][abstract]
  3. Sang-Kil Son, Robert Thiele, Zoltan Jurek, Beata Ziaja, and Robin Santra, Quantum-mechanical calculation of ionization-potential lowering in dense plasmas in European XFEL and DESY Photon Science Users' Meeting (DESY, Hamburg, Germany, January 29-31, 2014) [poster] [bib][poster][abstract][link]
  4. Sang-Kil Son, Lorenzo Galli, Henry N. Chapman, and Robin Santra, High-intensity phasing 
with x-ray free-electron lasers in European XFEL and DESY Photon Science Users' Meeting (DESY, Hamburg, Germany, January 28-30, 2015) [poster] [bib][poster][abstract][link]
  5. Sang-Kil Son, Koudai Toyota, Ludger Inhester, Yajiang Hao, Kota Hanasaki, et al., Giant x-ray multiphoton ionization of atoms and molecules in European XFEL and DESY Photon Science Users' Meeting (DESY, Hamburg, Germany, January 23-25, 2019) [poster] [bib][poster][abstract][link]
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[Show other talks/presentations by colleagues]

Supervision (co-supervision with Robin Santra)
Oct. 2021 ~ present Laura Budewig, Ph.D. Student, Dept. of Physics, Uni. Hamburg, Germany
Nov. 2020 ~ Jun. 2021 Dr. John Jasper Bekx, Post-Doctoral Fellow, CFEL, DESY, Germany
Mar. 2020 ~ Sep. 2021 Laura Budewig, Master Student, Dept. of Physics, Uni. Hamburg, Germany
Oct. 2018 ~ Sep. 2022 Dr. Rui Jin, Post-Doctoral Fellow, CFEL, DESY, Germany
Jul. 2018 ~ Sep. 2018 Tanakrit Mamee, DESY Summer Student, DESY, Germany
Oct. 2017 ~ Dec. 2021 Julia Schäfer, Ph.D. Student, Dept. of Chemistry, Uni. Hamburg, Germany
Aug. 2017 ~ Aug. 2021 Daria Kolbasova, Ph.D. Student, Dept. of Physics, Uni. Hamburg, Germany
Jan. 2017 ~ Jul. 2017 Julia Schäfer, Master Student, Dept. of Chemistry, Uni. Tübingen, Germany
Jul. 2016 ~ Sep. 2016 Daria Kolbasova, DESY Summer Student, DESY, Germany
Apr. 2015 ~ Jul. 2018 Dr. Koudai Toyota, Post-Doctoral Fellow, CFEL, DESY, Germany
Oct. 2014 ~ Sep. 2019 Dr. Ludger Inhester, Post-Doctoral Fellow, CFEL, DESY, Germany
Jul. 2014 ~ Sep. 2014 Dmitrii Shedogubov, DESY Summer Student, DESY, Germany
Aug. 2014 ~ Apr. 2016 Dr. Kota Hanasaki, Post-Doctoral Fellow, Dept. of Physics, Uni. Hamburg, Germany
Jan. 2014 ~ Dec. 2014    Dr. Yajiang Hao, Post-Doctoral Fellow, CFEL, DESY, Germany
Jul. 2013 ~ Sep. 2013 Ekaterina Staroselskaya (Kuzmina), DESY Summer Student, DESY, Germany
Jul. 2013 ~ Dec. 2013 Muhammad Saqib, Ph.D. Student, Dept. of Physics, Uni. Hamburg, Germany

Conference organization
Jan. 2016 Co-organizer, XFEL-Matter Interaction: Recent Advances in Theory, A Satellite Meeting of [DESY Photon Science Users' Meeting 2016]
Jun. 2015 Organizer, Ultrafast X-ray Summer School 2015 [UXSS 2015]
Jun. 2014 Co-organizer, Ultrafast X-ray Summer Seminar 2014 [UXSS 2014]
Jan. 2013 ~ present      Organizer, CFEL Theory Seminar and CFEL-DESY Theory Seminar

Teaching
Jul. 2022 Lecturer for DESY Summer Student Lecture, “Fundamentals of x-ray interaction with matter,” DESY, Germany
Aug. 2021 Lecturer for DESY Summer Student Lecture, “Fundamentals of x-ray interaction with matter,” DESY, Germany
Jun. 2020 Lecturer for Ultrafast X-ray Summer School 2020, “Theory of x-ray–matter interactions,” Stanford, United States [UXSS 2020] [Lecture 2 YouTube]
Aug. 2019 Lecturer for DESY Summer Student Lecture, “Fundamentals of x-ray interaction with matter,” DESY, Germany
Aug. 2018 Lecturer for DESY Summer Student Lecture, “Fundamentals of x-ray interaction with matter,” DESY, Germany
May. 2018 ~ Jun. 2018 Lecturer for IMPRS-UFAST core course, “Theory of electronic structure and molecular dynamics,” IMPRS-UFAST, Hamburg, Germany
Aug. 2017 Lecturer for DESY Summer Student Lecture, “Fundamentals of x-ray interaction with matter,” DESY, Germany
Jan. 2017 ~ Feb. 2017 Lecturer for IMPRS-UFAST core course, “Theory of electronic structure and molecular dynamics,” IMPRS-UFAST, Hamburg, Germany
Oct. 2016 ~ Feb. 2017 Lecturer for “The Basis of Modern Molecular Physics” (with Jochen Küpper, Tim Laarmann, and Sebastian Trippel), Universität Hamburg, Germany
Jul./Aug. 2016 Lecturer for DESY Summer Student Lecture, “Fundamentals of x-ray interaction with matter,” DESY, Germany
Jul. 2015 Lecturer for DESY Summer Student Lecture, “Fundamentals of x-ray interaction with matter,” DESY, Germany
Aug. 2006 ~ Apr. 2007 Graduate Teaching Assistant, Univ. of Kansas, United States [CHEM184 Lab] [CHEM188 Lab]
Aug. 2003 ~ Dec. 2009 Grading for graduate courses, Univ. of Kansas, United States [CHEM648] [CHEM750] [CHEM752] [CHEM915]
Jan. 1996 ~ Jan. 1996    Teaching Assistant in the 28th International Chemistry Olympiad Training Winter School for the High School Student, Chemistry Competition Finalists, KAIST, Korea

Service
Referee for Astrophysical Journal, IUCrJ, Journal of Applied Crystallography, Journal of Chemical Physics, Journal of the Optical Society of America B, Journal of Physics B, Journal of Physical Chemistry, Journal of Physical Chemistry Letters, Molecules, Nature Physics, Physical Review A, Physical Review B, Physical Review Letters, Physical Review Research, Physica Scripta, Physics of Plasmas, and Scientific Reports
Aug. 2021      Member of the examination commission for Ph.D. thesis of Daria Kolbasova, Dept. of Physics, Universität Hamburg, Germany
Feb. 2021 ~ present    Member of the AMO scientific advisory committee on Shanghai XFELs
Apr. 2020      Opponent of the examination commission for Ph.D. thesis of Jesper Norell, Dept. of Physics, Stockholm University, Sweden
May. 2019      Member of the examination commission for Ph.D. thesis of Vinicius Silva de Oliveira, Dept. of Physics, Universität Hamburg, Germany
Sep. 2017 ~ present    Member of the editorial board for the DESY Photon Science Annual Reports

Short-term research experiences
Jan. 2010 ~ May. 2010 Research Assistant, Univ. of Kansas, United States
Jul. 2007 ~ Sep. 2007 Visiting Researcher, National Taiwan Univ., Taiwan
Feb. 2003 ~ Jun. 2003    Visiting Researcher, KAIST, Korea

Awards and prizes
May. 2009      Higuchi Doctoral Progress Award in Dept. of Chemistry, Univ. of Kansas, United States
May. 2008    McCollum Research Scholarship in Dept. of Chemistry, Univ. of Kansas, United States
Apr. 2006    Paul and Helen Gilles Award in Physical Chemistry in Dept. of Chemistry, Univ. of Kansas, United States
May. 2004    H. P. Cady Award for the best first year graduate student in Dept. of Chemistry, Univ. of Kansas, United States

Other activities
Oct. 1999 ~ Jan. 2003 Republic of Korea Air Force Officer (Discharged as First Lieutenant)
Feb. 1999 ~ Sep. 1999 KLUSTER : KAIST Cluster Group (Discussed Linux Clustering)
May. 1994 ~ Feb. 1999 Grimijua : Fine Arts Campus Club (Founder / Held and Participated in 3 campus exhibitions)
Mar. 1993 ~ Feb. 1997    KMUG : KAIST Mac User Group (President in 1995)

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