Sum-Frequency Generation from a Thin Spherical Layer: I. Analytical Solution
| Autor: | A. A. Shamyna, V. N. Kapshai |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Physics
Condensed matter physics Plane (geometry) Linear polarization Dielectric Elliptical polarization 01 natural sciences Directivity Electromagnetic radiation Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials 010309 optics 0103 physical sciences Harmonic 010306 general physics Anisotropy |
| Zdroj: | Optics and Spectroscopy. 124:826-833 |
| ISSN: | 1562-6911 0030-400X |
| Popis: | We have analyzed the influence of the angle between the wave vectors of two incident waves (the opening angle) and of the type of the anisotropy of a nonlinear layer on the shape of the directivity pattern of a sum-frequency harmonic generated by the two plane elliptically polarized electromagnetic waves from a thin spherical optically nonlinear layer deposited on the surface of a dielectric spherical particle placed in a dielectric. Our analysis has shown that, if the radius of the thin spherical nonlinear layer is small, the shape of the directivity pattern will change significantly with increasing opening angle only for some types of anisotropy: the main lobes shift toward the direction that is opposite to the direction of the sum of the wave vectors of the incident waves. For three types of anisotropy, the directivity patterns have similar shapes. We have also found that, for one of the types of the anisotropy, the shape of the directivity pattern remains unchanged upon a change in the opening angle. The mathematical properties of functions describing the spatial distribution of the generated harmonic have been determined. In particular, it has been found that, upon incidence of linearly polarized waves on a thin nonlinear spherical layer that possesses either solely chiral or solely nonchiral nonlinear properties, linearly polarized radiation of the sum-frequency harmonic is generated. |
| Databáze: | OpenAIRE |
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