Haijiang Peng Peng, H. J., & Aspnes, D. E. (2005). Dipole-radiation model for terahertz radiation from semiconductors. APPLIED PHYSICS LETTERS, 86(21). https://doi.org/10.1063/1.1937992 Peng, H. J., Adles, E. J., Wang, J. F. T., & Aspnes, D. E. (2005). Relative bulk and interface contributions to optical second-harmonic generation in silicon. PHYSICAL REVIEW B, 72(20). https://doi.org/10.1103/physrevb.72.205203 Peng, H. J., & Aspnes, D. E. (2004). Calculation of bulk third-harmonic generation from crystalline Si with the simplified bond hyperpolarizability model. PHYSICAL REVIEW B, 70(16). https://doi.org/10.1103/physrevb.70.165312 Hansen, J. K., Peng, H. J., & Aspnes, D. E. (2003). Application of the simplified bond-hyperpolarizability model to fourth-harmonic generation. JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, Vol. 21, pp. 1798–1803. https://doi.org/10.1116/1.1593057 Aspnes, D. E., Hansen, J. K., Peng, H. J., Powell, G. D., & Wang, J. F. T. (2003, December). Simplified bond-hyperpolarizability model of second- and fourth-harmonic generation: application to Si-SiO2 interfaces. PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, Vol. 240, pp. 509–517. https://doi.org/10.1002/pssb.200303825