How Nonlinear Optics can be Simplified to Study Molecular Deposition and Surface Vicinality of a Si(001) Interface

Workshop and International Seminar on Science of Complex Natural Systems

Hardhienata, Hendradi^1

Theoretical Physics Division, Department of Physics, Bogor Agricultural University, Kampus IPB Darmaga, Jl. Meranti, Gedung Wing S, Jawa Barat, Bogor

16680, Indonesia^1

关键词: Centrosymmetric materials;    Hyper-polarizability;    Intensity profiles;    Measurements of;    Molecular deposition;    Optical surfaces;    Surface deposition;    Vicinal angle;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/31/1/012017/pdf
DOI  :  10.1088/1755-1315/31/1/012017

来源: IOP

【 摘 要 】

Second-harmonic-generation (SHG) has long been considered as a powerful optical surface diagnostic tool due to its ability to sense optical surface properties in centrosymmetric material. In a series of papers Aspnes et. al. showed that azimuthal measurements of rotated samples can be described by the so called simplified bond-hyperpolarizabilty model (SBHM) [G. D. Powell, J. F. Wang, and D. E. Aspnes, Phys. Rev. B 65, 205320 (2002)]. In this work, their model is applied to show how small changes in the step hyperpolarizability and vicinal angle of a Silicon (001) interface affects the second harmonic generation (SHG) intensity profile significantly, suggesting that real time surface deposition and interface vicinal angle monitoring using SHG is possible.