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Robin Santra 교수님 지도하에 x-ray free-electron laser와 관련된 다양한 연구를 하고 있습니다.

XATOM: all about x-ray atomic physics

MAD at high x-ray intensity

1. S.-K. Son, L. Young, and R. Santra, Impact of hollow-atom formation on coherent x-ray scattering at high intensity, Phys. Rev. A 83, 033402 (2011)
2. G. Doumy, C. Roedig, S.-K. Son, C. I. Blaga, A. D. DiChiara et al., Nonlinear atomic response to intense ultrashort x rays, Phys. Rev. Lett. 106, 083002 (2011)
3. S.-K. Son, H. N. Chapman, and R. Santra, Multiwavelength anomalous diffraction at high x-ray intensity, Phys. Rev. Lett. 107, 218102 (2011)
4. B. Rudek, S.-K. Son, L. M. Foucar, S. W. Epp, B. Erk et al., Ultra-efficient ionization of heavy atoms by intense X-ray free-electron laser pulses, (submitted, 2012)
5. A. Sytcheva, S. Pabst, S.-K. Son, and R. Santra, Enhanced nonlinear response of Ne⁸⁺ to intense ultrafast x rays, Phys. Rev. A 85, 023414 (2012)
6. R. W. Dunford, S. H. Southworth, D. Ray, E. P. Kanter, B. Krässig et al., Interatomic Coulombic decay in Xe K-shell vacancy decay of XeF₂, (submitted, 2012)
7. S.-K. Son and R. Santra, Monte-Carlo calculation of ion, electron, and photon spectra of xenon atoms in x-ray free-electron laser pulses, (submitted, 2012)

1. S.-K. Son, Theoretical study of strong-field multiphoton ionization of polyatomic molecules: a new time-dependent Voronoi-cell finite difference method in CFEL Seminar (CFEL, DESY, Hamburg, Germany, July 23, 2010) [oral presentation]
2. G. Doumy, C. Roedig, S.-K. Son, C. I. Blaga, A. D. DiChiara et al., Nonlinear atomic response to ultraintense and ultrashort x-ray pulses in 75th Annual Meeting of the DPG and DPG Spring Meeting (German Physical Society, Dresden, Germany, March 13-18, 2011) [oral presentation]
3. S.-K. Son, H. N. Chapman, and R. Santra, Multi-wavelength anomalous diffraction phasing method at high intensity in New Science Opportunities at FLASH (DESY, Hamburg, Germany, October 12-14, 2011) [oral presentation]
4. S.-K. 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]
5. S.-K. Son, H. N. Chapman, and R. Santra, Multiwavelength anomalous diffraction at high x-ray intensity in DPG Spring Meeting of the Section AMOP (German Physical Society, Stuttgart, Germany, March 12-16, 2012) [oral presentation]

1. S.-K. Son, L. Young, and R. Santra, HASYLAB Users' Meeting (2011)
2. S.-K. Son, L. Young, and R. Santra, DPG (2011)
3. S.-K. Son and R. Santra, CFEL-Symposium (2011)
4. S.-K. Son and R. Santra, APiP (2011)
5. S.-K. Son and R. Santra, CQSE workshop (2012)
6. S.-K. Son, H. N. Chapman, and R. Santra, HASYLAB Users' Meeting (2012)
7. S.-K. Son and R. Santra, PPP (2012)
8. S.-K. Son, H. N. Chapman, and R. Santra, Science at FELs (2012)

1. A. Sytcheva, S. Pabst, S.-K. Son, and R. Santra, DPG (2012)
2. R. W. Dunford, S. H. Southworth, D. Ray, E. P. Kanter, B. Kraessig et al., DPG (2012)
3. B. Rudek, D. Rolles, A. Rudenko, S.-K. Son, L. Foucar et al., DPG (2012)
4. D. Ray, R. W. Dunford, S. H. Southworth, E. P. Kanter, B. Krässig et al., DAMOP (2012)
5. S. Bhardwaj, S.-K. Son, R. Santra, and F. X. Kärtner, CLEO (2012)
6. L. Müller, C. Gutt, B. Pfau, S. Schaffert, J. Geilhufe et al., Science at FELs (2012)

Shih-I Chu 교수님 지도하에 원자 및 분자 물리학을 연구하였습니다. 보통 광학을 포함해서 AMO physics(Atomic, Molecular, and Optical Physics)라고 불리웁니다. 특히 시간을 포함한 슈뢰딩거 파동방정식(TDSE)을 풀어서 다양한 물리·화학분야에 응용하는 것을 목표로 하였습니다. 기존의 방법론을 벗어나 새로운 이론과 새로운 계산방법을 필요로 하기 때문에 새로운 시도를 많이 경험하였습니다.

• 박사논문: 초강력장 다광자 작용의 연구를 위한 새로운 이론적·계산적 방법의 개발 / New Development of Theoretical and Computational Methods for Probing Strong-Field Multiphoton Processes, Ph.D. Thesis, University of Kansas (2009)

New development of numerical grid-based methods

Strong-field multiphoton processes in polyatomic molecules

Frequency comb structure and coherent control

Multiphoton quantum interference in a superconducting qubit

Non-Hermitian Floquet formalism

1. J. J. Carrera, S.-K. Son, and S.-I. Chu, Ab initio theoretical investigation of the frequency comb structure and coherence in the vuv-xuv regimes via high-order harmonic generation, Phys. Rev. A 77, 031401(R) (2008)
2. S.-K. Son and S.-I. Chu, Many-mode Floquet theoretical approach for coherent control of multiphoton dynamics driven by intense frequency-comb laser fields, Phys. Rev. A 77, 063406 (2008)
3. S.-K. Son, S. Han, and S.-I. Chu, Floquet formulation for the investigation of multiphoton quantum interference in a superconducting qubit driven by a strong ac field, Phys. Rev. A 79, 032301 (2009)
4. S.-K. Son and S.-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)
5. S.-K. Son and S.-I. Chu, Theoretical study of orientation-dependent multiphoton ionization of polyatomic molecules in intense ultrashort laser fields: A new time-dependent Voronoi-cell finite difference method, Chem. Phys. 366, 91 (2009)
6. S.-K. Son, D. A. Telnov, and S.-I. Chu, Probing the origin of elliptical high-order harmonic generation from aligned molecules in linearly polarized laser fields, Phys. Rev. A 82, 043829 (2010)
7. S.-K. Son, Voronoi-cell finite difference method for accurate electronic structure calculation of polyatomic molecules on unstructured grids, J. Comput. Phys. 230, 2160 (2011)

1. S.-K. Son and S.-I. Chu, DAMOP (2006)
2. S.-K. Son and S.-I. Chu, DAMOP (2007)
3. S.-K. Son and S.-I. Chu, DAMOP (2007)
4. J. J. Carrera, S.-K. Son, and S.-I. Chu, DAMOP (2007)
5. S.-K. Son and S.-I. Chu, DAMOP (2008)
6. S.-K. Son and S.-I. Chu, Attosecond (2009)
7. S.-K. Son and S.-I. Chu, KPCS (2009) [oral presentation]
8. S.-K. Son, D. A. Telnov, and S.-I. Chu, DAMOP (2010)

이윤섭 교수님 지도하에 계산양자화학(computational quantum chemistry) 분야를 연구하였습니다. 초중량원소를 포함한 분자들의 계산, 스핀-궤도 상호작용에 대한 연구, 분자자성체의 이론적 분석, 기저함수의 부족함에 대한 연구 등을 수행하였습니다.

• 석사논문: 초중량원소 113번, 114번을 포함하는 다원자분자인 수소화물과 불소화물의 이성분 계산 / Two-component calculations for polyatomic hydrides and fluorides containing superheavy elements 113 and 114, M.S. Thesis, KAIST (1999)

1. Y.-K. Han, S.-K. Son, Y. J. Choi, and Y. S. Lee, Structures and stabilities for halides and oxides of transactinide elements Rf, Db, and Sg calculated by relativistic effective core potential methods, J. Phys. Chem. A 103, 9109 (1999)
2. C. S. Hong, S.-K. Son, Y. S. Lee, M.-J. Jun, and Y. Do, High-dimensional manganese(II) compounds with noncovalent and/or covalent bonds derived from flexible ligands: Self-assembly and structural transformation, Inorg. Chem. 38, 5602 (1999)
3. Y.-K. Han, C. Bae, S.-K. Son, and Y. S. Lee, Spin-orbit effects on the transactinide p-block element monohydrides MH (M=element 113-118), J. Chem. Phys. 112, 2684 (2000)
4. C. S. Hong, J.-E. Koo, S.-K. Son, Y. S. Lee, Y.-S. Kim, and Y. Do, Unusual ferromagnetic couplings in single end-to-end azide-bridged cobalt(II) and nickel(II) chain systems, Chem. Eur. J. 7, 4243 (2001)
5. Y.-K. Han, K. H. Kim, S.-K. Son, and Y. S. Lee, Effects of intramolecular basis set superposition error on conformational energy difference of 1,2-difluoroethane and 1,2-dimethoxyethane, Bull. Korean Chem. Soc. 23, 1267 (2002)

1. Y.-K. Han, K. H. Kim, S.-K. Son, and Y. S. Lee, KCS (1997)
2. S.-K. Son, Y.-K. Han, and Y. S. Lee, KCS (1998)
3. Y.-K. Han, C. Bae, S.-K. Son, and Y. S. Lee, KCS (1998)

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