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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Desenvolvimento de um algoritmo computacional MoM 3D aplicado em nanoplasmônica

SOUZA, Nadson Welkson Pereira de 13 December 2012 (has links)
Submitted by Edisangela Bastos (edisangela@ufpa.br) on 2013-04-24T22:21:51Z No. of bitstreams: 2 license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) Dissertacao_DesenvolvimentoAlgoritmoComputacional.pdf: 1177006 bytes, checksum: 819ac77a9d88b4c93e2ba222d3cee8d6 (MD5) / Approved for entry into archive by Ana Rosa Silva(arosa@ufpa.br) on 2013-04-29T15:25:07Z (GMT) No. of bitstreams: 2 license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) Dissertacao_DesenvolvimentoAlgoritmoComputacional.pdf: 1177006 bytes, checksum: 819ac77a9d88b4c93e2ba222d3cee8d6 (MD5) / Made available in DSpace on 2013-04-29T15:25:07Z (GMT). No. of bitstreams: 2 license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) Dissertacao_DesenvolvimentoAlgoritmoComputacional.pdf: 1177006 bytes, checksum: 819ac77a9d88b4c93e2ba222d3cee8d6 (MD5) Previous issue date: 2012 / Este trabalho apresenta o desenvolvimento de um algoritmo computacional para análise do espalhamento eletromagnético de nanoestruturas plasmônicas isoladas. O Método dos Momentos tridimensional (MoM-3D) foi utilizado para resolver numericamente a equação integral do campo elétrico, e o modelo de Lorentz-Drude foi usado para representar a permissividade complexa das nanoestruturas metálicas. Baseado nesta modelagem matemática, um algoritmo computacional escrito em linguagem C foi desenvolvido. Como exemplo de aplicação e validação do código, dois problemas clássicos de espalhamento eletromagnético de nanopartículas metálicas foram analisados: nanoesfera e nanobarra, onde foram calculadas a resposta espectral e a distribuição do campo próximo. Os resultados obtidos foram comparados com resultados calculados por outros modelos e observou-se uma boa concordância e convergência entre eles. / This work presents the development of a computational algorithm for electromagnetic scattering analysis of isolated plasmonic nanostructures. The tridimensional Method of Moments (MoM-3D) was used to solve the electric field integral equation, and the Lorentz-Drude model was used to represent the complex permittivity of the metallic nanostructures. Based in this model, a computational algorithm written in C language was developed. As example of application and validation of the code, two classical electromagnetic scattering problems of metallic nanoparticles are analyzed: nanosphere and rectangular nanorod, where the spectral response and near-field distributions were calculated. The obtained results were compared with other models and a good agreement and convergence was observed.

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