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Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Curs: 2018, Tutor: Xavier Batlle

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Plasmon resonances in nanospheres, nanoshells and nanorods are discussed through
the study of the optical extinction spectra. The formation of dipolar electric fields and charge density distributions for small nanoparticles is observed, thus confirming the validity of the quasistatic approximation of Mie theory, which is found to hold up to particle sizes of about 150 nm. Finally, plasmon coupling effects are studied in nanorod dimers where huge electric field enhancement is observed.