0000000000240363
AUTHOR
Mattia Signoretto
showing 4 related works from this author
Purcell-enhancement of the radiative PL decay in perylenediimides by coupling with silver nanoparticles into waveguide modes
2017
In this work, an interesting approach to enhance the coupling between excitons and plasmons is proposed by integrating highly luminescent perylenediimides (PDIs) and Ag metal nanoparticles (MNPs) in the core of a multilayer dielectric waveguide. The combination of the weak plasmonic coupling and the high scattering of MNPs gives rise to a significant improvement of the PDI photoluminescence and Purcell factor (PF) in forward-scattering geometry. Furthermore, when the PDI-MNP system is used as the core of a multilayer waveguide, a Purcell factor enhancement larger than 10 is observed, which is explained by an increase in the exciton-plasmon coupling under the light confinement in the wavegui…
Efficient Optical Amplification in a Sandwich-Type Active-Passive Polymer Waveguide Containing Perylenediimides
2017
Polymer waveguides doped with luminescent materials serve as a suitable flexible platform for active elements (lasers and amplifiers) in on-chip optical circuits. However, at present, the best parameters (lowest thresholds) achieved with these devices are obtained with the use of the stripe excitation technique in the framework of which external illumination of an active material along the whole length of the waveguide is realized that is not convenient for the waveguide on-chip integration and requires high peak energies due to the large excitation area. In the present work, an elegant method is proposed to overcome this obstacle and provide efficient active material pumping along the whol…
Polymer waveguide couplers based on metal nanoparticle–polymer nanocomposites
2015
In this work Au nanoparticles (AuNPs) are incorporated into poly(methyl methacrylate) (PMMA) waveguides to develop optical couplers that are compatible with planar organic polymer photonics. A method for growing AuNPs (of 10 to 100 nm in size) inside the commercially available Novolak resist is proposed with the intention of tuning the plasmon resonance and the absorption/scattering efficiencies inside the patterned structures. The refractive index of the MNP-Novolak nanocomposite (MNPs: noble metal nanoparticles) is carefully analysed both experimentally and numerically in order to find the appropriate fabrication conditions (filling factor and growth time) to optimize the scattering cross…
Integration of Perylenediimides and metal nanoparticles in polymer waveguides for photonics
2017
Actualmente la implementación de nuevos dispositivos fotónicos capaces de integrar nuevas funcionalidades ópticas en dimensiones nanométricas despierta un gran interés. Por ello, la presente Tesis Doctoral propone desarrollar una nueva tecnología fotónica basada en la combinación de nanopartículas metálicas (MNPs) con moléculas orgánicas, en particular perilenos (PDI). El objetivo principal de este trabajo ha sido la incorporación de PDI y/o MNPs en guías de ondas poliméricas, con el fin de usar sus propiedades activas/plasmónicas para construir nuevos dispositivos ópticos integrados. Para ello, en primer lugar, se fabricó y caracterizó de guías de onda, que contienen PDI dispersos en Poli(…