Use este identificador para citar ou linkar para este item:
http://www.repositorio.ufal.br/jspui/handle/123456789/14348
Tipo: | Dissertação |
Título: | On the role of spatial coherence of optical beams in one dimensional photonic lattices |
Autor(es): | Cirino, Miquéias Jacinto |
Primeiro Orientador: | Brandão Filho, Paulo César Aguiar |
metadata.dc.contributor.referee1: | Cavalcanti, Solange Bessa |
metadata.dc.contributor.referee2: | Costa, Alex Emanuel Barros |
Resumo: | The propagation of a partially coherent optical field in a periodic photonic lattice with one-dimensional periodicity was investigated using the framework of Floquet-Bloch modes. The deterministic counterpart was explored by using a Gaussian source to establish a solid baseline for how the system responds to parameters: the influence of transverse momentum and lattice amplitude on beam propagation and participation coefficients was discussed. The stochastic aspect of the system was considered, where we described the interplay between lattice properties and field fluctuations by considering the optical beam as a superposition of Floquet-Bloch modes with coefficients being stationary random processes. The second-order theory of coherence was employed to demonstrate that the propagation of partially coherent optical fields depends on the excitation of bands and on the correlations between them. The role of spatial coherence in the system was explored through the cross-correlation participation coefficients, indicating how the power of the beam is distributed in terms of the band structure. In the end, we used the results to describe the dynamics of the beam center. |
Abstract: | não tem |
Palavras-chave: | Classical Optics Interference and Diffraction of Light Optical Coherence Óptica Interferência (Luz) Difração de luz Coerência Óptica |
CNPq: | CNPQ::CIENCIAS EXATAS E DA TERRA::FISICA |
Idioma: | por |
País: | Brasil |
Editor: | Universidade Federal de Alagoas |
Sigla da Instituição: | UFAL |
metadata.dc.publisher.program: | Programa de Pós-Graduação em Física |
Citação: | CIRINO, Miquéias Jacinto. On the role of spatial coherence of optical beams in one dimensional photonic lattices. 2024. 94 f. Dissertação (Mestrado em Fisica) – Programa de Pós-Graduação em Física, Instituto de Física, Universidade Federal de Alagoas, Maceió, 2024. |
Tipo de Acesso: | Acesso Aberto |
URI: | http://www.repositorio.ufal.br/jspui/handle/123456789/14348 |
Data do documento: | 26-fev-2024 |
Aparece nas coleções: | Dissertações e Teses defendidas na UFAL - IF |
Arquivos associados a este item:
Arquivo | Descrição | Tamanho | Formato | |
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On the role of spatial coherence of optical beams in one dimensional photonic lattices.pdf | 17.8 MB | Adobe PDF | Visualizar/Abrir |
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