1. Juan J. Carrera, Sang-Kil Son, and Shih-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. Sang-Kil Son and Shih-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. Sang-Kil Son, Dmitry A. Telnov, and Shih-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).
4. Siddharth Bhardwaj, Sang-Kil Son, Kyung-Han Hong, Chien-Jen Lai, Franz X. Kärtner, and Robin Santra, “Recombination-amplitude calculations of noble gases, in both length and acceleration forms, beyond the strong-field approximation,” Phys. Rev. A 88, 053405 (2013).