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Dielectric function and plasmonic behavior of Ga(II) and Ga(III)


Abstract: In order to exploit gallium?s (Ga) rich polymorphism in the design of phase-change plasmonic systems, accurate understanding of the dielectric function of the different Ga-phases is crucial. The dielectric dispersion profiles of those phases appearing at atmospheric pressure have been reported in the literature, but there is no information on the dielectric function of the high-pressure Ga-phases. Through first principles calculations we present a comprehensive analysis of the interdependence of the crystal structure, band structure, and dielectric function of two high-pressure Ga phases (Ga(II) and Ga(III)). The plasmonic behavior of these high-pressure Ga-phases is compared to those stable (liquid- and ?-Ga) and metastable (?-, ?- and ?-Ga) at atmospherics pressure. This analysis can have important implications in the design of pressure-driven phase-change Ga plasmonic devices and high-pressure SERS substrates.



Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Fuente: Optical Materials Express Vol. 9, Issue 10, pp. 4050-4060 (2019)

Editorial: OSA, Optical Society of America

 Fecha de publicación: 01/10/2019

Nº de páginas: 11

Tipo de publicación: Artículo de Revista

DOI: 10.1364/OME.9.004050

ISSN: 2159-3930

Proyecto español: 4JU2864661

Url de la publicación: https://doi.org/10.1364/OME.9.004050

Autores/as

YAEL GUTIERREZ VELA
LOSURDO, MARÍA
MARTA SAINZ DE LA MAZA KAUFMANN