Integrated photonic circuits based on plasmonic modes in microstructured optical fibers

Abstract

This thesis considers the phenomena associated with plasmon modes excited in MOFs, with a particular interest in higher-order plasmon modes and their coupling with propagation modes of the MOF. These multiple couplings, according to our prior knowledge, are the cause of the multiple resonances that occur in the transmittance spectrum of the SC-MOF. At this point, the study of symmetrical structures, in which the medium surrounding the metal film is homogeneous, and antisymmetric structures, in which the upper and lower media are different, was also addressed, but in these cases, multilayer structures were used because of it offers the possibility of modifying the propagation properties of the excited plasmon modes and tuning the resonance condition, improving the performance of the devices. Following this line of analysis, the excitation of plasmon modes in MOFs containing metal-filled holes was also considered. To facilitate the modeling of the structure and a better understanding of the associated phenomena the metal-filled holes were considered as nanowires with smoothed walls, avoiding the presence of localized modes in corners formed by inhomogeneities. Overall, modeling and understanding these structures was possible obtaining conditions for exciting hybrid modes, which appear to be ideal for photonic circuits

This thesis considers the phenomena associated with plasmon modes excited in MOFs, with a particular interest in higher-order plasmon modes and their coupling with propagation modes of the MOF. These multiple couplings are the cause of the multiple resonances that occur in the transmittance spectrum of the SC-MOF. At this point, the study of symmetrical structures, in which the medium surrounding the metal film is homogeneous, and antisymmetric structures, in which the upper and lower media are different, was also addressed, but in these cases, multilayer structures were used because of it offers the possibility of modifying the propagation properties of the excited plasmon modes and tuning the resonance condition, improving the performance of the devices. Following this line of analysis, the excitation of plasmon modes in MOFs containing metal-filled holes was also considered. To facilitate the modeling of the structure and a better understanding of the associated phenomena the metal-filled holes were considered as nanowires with smoothed walls, avoiding the presence of localized modes in corners formed by inhomogeneities. Overall, modeling and understanding these structures was possible obtaining conditions for exciting hybrid modes, which appear to be ideal for photonic circuits.