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Descripción
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| The optical response of plasmonic nanoparticles can be engineered for an incredibly large number of useful applications but it requires a complex balance between the competing requirements of the application, optics and fabrication. Hence, a compromise must be reached in most cases, which implies using nanoparticles with a suboptimal optical response for the specific application. This highlights the need to develop new manufacturing or modification strategies to have a better control over the nanoparticles? optical response. Femtosecond laser irradiation can provide the required flexibility to attain an extreme control over the modification of various types of plasmonic nanoparticles, producing structures with a greatly improved optical response. For example, we have devised a light-controlled synthetic procedure that allows the fabrication of selected plasmonic oligomers.1 This process can be tuned to increase the temperature at the interparticle gaps to melt tips and weld the particles together, offering a new pathway toward fabrication of novel complex nanoparticles with a plasmonic response not attainable by other methods. Finally, we have also shown that irradiation of nanorod colloids with a femtosecond laser can be tuned to induce controlled reshaping, yielding colloids with unprecedentedly narrow localized surface plasmon resonance bands.2 The process is characterized by a gentle multi-shot reduction of the aspect ratio, responsible for the widening of the plasmon band, whereas the rod shape and volume are barely affected. This perfection process provides a simple, fast, reproducible and scalable route toward nanorods with an optical response of exceptional quality, near the theoretical limit. | |
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Internacional
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Si |
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Nombre congreso
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In 5th International Meeting for Researchers in Materials and Plasma Technology (5th IMRMPT), 2019 |
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Tipo de participación
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960 |
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Lugar del congreso
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San José de Cúcuta, Colombia |
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Revisores
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Si |
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ISBN o ISSN
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0000-0000 |
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DOI
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Fecha inicio congreso
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28/05/2019 |
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Fecha fin congreso
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31/05/2019 |
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Desde la página
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1 |
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Hasta la página
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2 |
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Título de las actas
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Proceedings Journal of Physics: Conference series |