Son, Sang-Kil, Ph.D.

Research 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
X-ray physics; X-ray free-electron laser (XFEL)-driven science
Attosecond and strong-field physics

Research highlights
xatom
XATOM: all about x-ray atomic physics
MAD
MAD at high x-ray intensity
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: an integrated toolkit 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 programing 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    Research 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)
Mar. 1991 ~ Feb. 1993    Busan High School of Science, Korea

Selected publications
[Son09a]
Phys. Rev. A 80, 011403(R) (2009)
[Son11a]
Phys. Rev. A 83, 033402 (2011)
[Son11e]
Phys. Rev. Lett. 107, 218102 (2011)
[Rudek12]
Nature Photon. 6, 858 (2012)
[Son14c]
Phys. Rev. X 4, 031004 (2014)
  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, Linda Young, and Robin Santra, Impact of hollow-atom formation on coherent x-ray scattering at high intensity, Phys. Rev. A 83, 033402 (2011) [bib][pdf][abstract][link]
  3. 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]
  4. Benedikt Rudek, Sang-Kil Son, Lutz Foucar, Sascha W. Epp, Benjamin Erk, et al., Ultra-efficient ionization of heavy atoms by intense x-ray free-electron laser pulses, Nature Photon. 6, 858–865 (2012) [bib][abstract][link]
  5. Sang-Kil Son, Robert Thiele, Zoltan Jurek, Beata Ziaja, and Robin Santra, Quantum-mechanical calculation of ionization potential lowering in dense plasmas, Phys. Rev. X 4, 031004 (2014) [bib][pdf][abstract][link]

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Invited talks
[Son15c]
ISWAMP3 (2015)
FU Berlin (2015)
Kassel (2015)
DAMOP (2016)
[Son15]
CCP4 (2015)
BioXFEL (2015)
RD8 (2014)
[Son13c]
REXS (2013)
PP (2014)
PLS Users' Workshop (2012)
[Son12]
CQSE workshop (2012)
  1. Sang-Kil Son, Electronic response to X-ray free-electron laser pulses in The 3rd CQSE International Workshop on Atomic, Molecular, and Ultrafast Science and Technology (National Taiwan University, Taipei, Taiwan, January 7-8, 2012) [invited talk] [bib][pdf][slide][abstract][link]
  2. Sang-Kil Son, Multiwavelength anomalous diffraction phasing method at high x-ray intensity in The 24th PLS Synchrotron Radiation Users' Workshop (POSTECH, Pohang, Korea, November 22, 2012) [invited talk] [bib][slide][abstract][link]
  3. Sang-Kil Son, Multiwavelength anomalous diffraction at high x-ray intensity in Workshop on Resonant Elastic X-ray Scattering in Condensed Matter (Oxford, UK, July 15-19, 2013) [invited talk] [bib][pdf][slide][abstract][link]
  4. Sang-Kil Son, Turning photoionization at high x-ray intensity into an advantage for femtosecond nanocrystallography in Photoionization and Photodetachment (Gordon Research Conference, Galveston, Texas, February 23-28, 2014) [invited talk] [bib][link]
  5. Sang-Kil Son, Happy phasing with electronic radiation damage at high x-ray intensity in 8th International Workshop on X-ray Radiation Damage to Biological Crystalline Samples (Hamburg, Germany, April 10-12, 2014) [invited talk] [bib][slide][abstract][link]
  6. Sang-Kil Son, High-intensity phasing with x-ray free-electron lasers in CCP4 Study Weekend (Nottingham, UK, January 7-9, 2015) [invited talk] [bib][slide][abstract][link]
  7. 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]
  8. 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]
  9. Sang-Kil Son, What happens to atoms and molecules during x-ray free-electron laser pulses? in Seminar on Dynamical Aspects of Theoretical Chemistry (Free University of Berlin, Berlin, Germany, November 19, 2015) [invited talk] [bib][abstract]
  10. Sang-Kil Son, What happens to atoms and molecules during x-ray free-electron laser pulses? in Physical Colloquium (Institute of Physics, University of Kassel, Kassel, Germany, December 3, 2015) [invited talk] [bib][pdf][abstract]
  11. Sang-Kil Son, Ultrafast ionization and fragmentation dynamics of molecules at high x-ray intensity in The 47th Meeting of the Division of Atomic, Molecular and Optical Physics (American Physics Society, Providence, Rhode Island, May 23-27, 2016) [invited talk] [bib][abstract][link]

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Selected posters
[Son13d]
CFEL symposium (2013)
[Son11b]
Users' Meeting (2011)
[Son12b]
Users' Meeting (2012)
[Son14]
Users' Meeting (2014)
[Son15b]
Users' Meeting (2015)
  1. Sang-Kil Son, Linda Young, and Robin Santra, Impact of hollow-atom formation on coherent x-ray scattering at high intensity in European XFEL and HASYLAB Users' Meeting (DESY, Hamburg, Germany, January 26-28, 2011) [poster] [bib][poster][abstract][link]
  2. 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]
  3. 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]
  4. 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]
  5. 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]

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[Show all presentations by colleagues]

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

Teaching and research experiences
Jul. 2015 Lecturer for DESY Summer Student Lecture "Fundamentals of x-ray interaction with matter", DESY, Germany
Jan. 2010 ~ May. 2010 Research Assistant, KU, U.S.
Jul. 2007 ~ Sep. 2007 Visiting Researcher, NTU, Taiwan
Aug. 2006 ~ Apr. 2007 Graduate Teaching Assistant, KU, U.S. [CHEM184 Lab] [CHEM188 Lab]
Aug. 2003 ~ Dec. 2009 Graduate Research Assistant, KU, U.S.
Grading: [CHEM648] [CHEM750] [CHEM752] [CHEM915]
Feb. 2003 ~ Jun. 2003 Visiting Researcher, KAIST, Korea
Jan. 1996 ~ Jan. 1996    Teaching Assistant in the 28th International Chemistry Olympiad Training Winter School for the High School Student, Chemistry Competition Finalists

Awards and prizes
May. 2009      Higuchi Doctoral Progress Award in Dept. of Chemistry, KU
May. 2008    McCollum Research Scholarship in Dept. of Chemistry, KU
Apr. 2006    Paul and Helen Gilles Award in Physical Chemistry in Dept. of Chemistry, KU
May. 2004    H. P. Cady Award for the best first year graduate student in Dept. of Chemistry, KU
Sep. 1992    Bronze medal at the 4th High School Student Chemistry Competition held by Ministry of Education, Korea

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 (Starting member / Held and Participated in 3 campus exhibitions)
Mar. 1993 ~ Feb. 1997    KMUG : KAIST Mac User Group (President in 1995)

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