Generation, reflection and transmission of nonlinear harmonic waves by direct superposition of anharmonic dipoles

Autor:	Kurt Hingerl, Adalberto Alejo-Molina, Hendradi Hardhienata
Rok vydání:	2021
Předmět:	Physics business.industry Anharmonicity Plane wave Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Nonlinear system Superposition principle Dipole Optics Transmission (telecommunications) Quantum electrodynamics Reflection (physics) business Phase matching
Zdroj:	Journal of Optics. 23:025501
ISSN:	2040-8986 2040-8978
DOI:	10.1088/2040-8986/abeb2d
Popis:	It is well known that the linear and nonlinear light reflection and transmission formula can be obtained from the standard macroscopic Maxwell equation. In the past, a microscopic approach based on the Ewald–Oseen extinction theorem to derive the reflection and transmission formula by direct dipole summation has been performed by Fearn et al where they successfully derived the Fresnel formula in linear optics. In this work, we extend their work for the first time to derive the nonlinear reflection and transmission formula by direct summation of anharmonically oscillating dipoles for the case of a normal incidence wave, yielding similar results with coupled-mode-theory (CMT). We demonstrate for a decaying incoming field that dipolar radiation is no longer forbidden inside the bulk of a centrosymmetric material. Using the simplified bond hyperpolarizability model (SBHM), we find that these additional bulk dipole contribution must be accounted along with the surface dipoles and bulk quadrupolar contribution to explain recent rotational anisotropy SHG intensity experimental data of Si(111) with high precision.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::47536c84a8f003a1c0bf002e88c2f36d https://doi.org/10.1088/2040-8986/abeb2d Zobrazit plný text záznamu