The optical properties of pyramidal prisms with applications in the generation of structured light
This thesis presents a numerical study of the structured light produced by a laser beam transmitted by a symmetric pyramidal prism. From the Fresnel formulation, expressions are obtained for the diffracted amplitudes that are valid for an arbitrary number of prism faces for both acute and flat-toppe...
| Autor: | |
|---|---|
| Tipo de recurso: | tesis de maestría |
| Estado: | Versión publicada |
| Fecha de publicación: | 2022 |
| País: | México |
| Institución: | Centro de Investigación Científica y de Educación Superior de Ensenada |
| Repositorio: | Repositorio Institucional CICESE |
| Idioma: | inglés |
| OAI Identifier: | oai:cicese.repositorioinstitucional.mx:1007/3752 |
| Acceso en línea: | http://cicese.repositorioinstitucional.mx/jspui/handle/1007/3752 |
| Access Level: | acceso abierto |
| Palabra clave: | info:eu-repo/classification/autor/Structured Light, Pyramidal Prisms, Fresnel Diffraction info:eu-repo/classification/autor/Luz estructurada, Prismas Priamidales, Difracción de Fresnel info:eu-repo/classification/cti/1 info:eu-repo/classification/cti/22 info:eu-repo/classification/cti/2209 info:eu-repo/classification/cti/220919 |
| Sumario: | This thesis presents a numerical study of the structured light produced by a laser beam transmitted by a symmetric pyramidal prism. From the Fresnel formulation, expressions are obtained for the diffracted amplitudes that are valid for an arbitrary number of prism faces for both acute and flat-topped prisms. These expressions are readily evaluated numerically and are a significant advancement over the restrictive discrete plane wave models used in prior works. The distribution of intensity of the diffracted light is studied for a wide range of prism parameters, and the unitarity of Fresnel integrals allows the determination of the efficiency of the intensity structures produced, which is not possible with the plane wave model. While most of the results presented to consider a Gaussian laser beam illuminating the prism, it is demonstrated that the theory may be readily extended to higher-order laser modes. Applications in optical trapping are considered, and examples are given in which the intensity distributions contain a number of bright spots with similar intensity, as could be suitable for the simultaneous trapping of several particles. Also considered are applications in lithography and, under other conditions, cases are presented that produce uniform periodic intensity patterns. The practical advantages of employing pyramidal prisms in such applications are their excellent stability and their efficiency in producing structured light. |
|---|