Autor según el artículo: Joan J. Carvajal; Laura Sánchez-García; Christos Tserkezis; Mariola O Ramírez; Pablo Molina; Magdalena Aguiló; Francesc Díaz; Javier Aizpurua; Luisa E. Bausá

Departamento: Química Física i Inorgànica

Autor/es de la URV: CARVAJAL MARTÍ, JOAN JOSEP; Laura Sánchez-García; Christos Tserkezis; Mariola O Ramírez; Pablo Molina; AGUILÓ DÍAZ, MAGDALENA; DÍAZ GONZÁLEZ, FRANCISCO MANUEL; Javier Aizpurua; Luisa E. Bausá

Palabras clave: Harmonic generation Nonlinear photonic devices Nonlinear optics

Resumen: We demonstrate a 60-fold enhancement of the second harmonic generation (SHG) response at the nanoscale in a hybrid metal-dielectric system. By using complex silver nanostructures photochemically deposited on the polar surface of a ferroelectric crystal, we tune the plasmonic resonances from the visible to the near-infrared (NIR) spectral region, matching either the SH or the fundamental frequency. In both cases the SHG signal at the metal-dielectric interface is enhanced, although with substantially different enhancement values: around 5 times when the plasmonic resonance is at the SH frequency or up to 60 times when it matches the fundamental NIR radiation. The results are consistent with the more spatially-extended near-field response of complex metallic nanostructures and can be well explained by taking into account the quadratic character of the SHG process. The work points out the potential of aggregates of silver nanostructures for enhancing optical nonlinearities at the nanoscale and provides an alternative approach for the development of nanometric nonlinear photonic devices in a scalable way.

Grupo de investigación: Física i Cristal·lografia de Nanomaterials Física i Cristal.lografia de Materials

Áreas temáticas: Chemistry Química Química

Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/

ISSN: 1094-4087

Identificador del autor: 0000-0002-4389-7298; n/a; 0000-0002-2075-9036; n/a; 0000-0002-0048-5090; 0000-0001-6130-9579; 0000-0003-4581-4967; 0000-0002-1444-7589; n/a

Fecha de alta del registro: 2016-05-19

Página final: 8500

Volumen de revista: 24

Versión del articulo depositado: info:eu-repo/semantics/publishedVersion

Enlace a la fuente original: https://www.osapublishing.org/oe/abstract.cfm?uri=oe-24-8-8491

DOI del artículo: 10.1364/OE.24.008491

Entidad: Universitat Rovira i Virgili

Año de publicación de la revista: 2016

Página inicial: 8491

Tipo de publicación: Article Artículo Article