1. Sang-Kil Son, Siyuan Han, and Shih-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).
2. 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).
3. Sang-Kil Son and Shih-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, 91–102 (2009).