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Title

Field-enhanced Circular Dichroism spectroscopy with subwalength silicon particle arrays

AuthorsLasa-Alonso, J.; Abujetas, Diego R. ; Molina-Terriza, Gabriel; Sáenz, J. J.; Aizpurua, Javier ; García-Etxarri, Aitzol
Issue Date2018
CitationCEN 2018
AbstractWe investigate light-matter interactions for chiral molecules in the presence of high index silicon nanoparticle arrays with the aim of enhancing the performance of Circular Dichroism (CD) spectroscopic techniques. We show that making use of lattice resonances of a finite array of such nanoparticles allows enhancing the fields scattered by the nanoparticles. Moreover, we obtain that, if the system fulfills duality symmetry, the local CD enhancement factor, fCD, depends on the square of the electric or magnetic field enhancement, which for this case are equal. Finally, we show that the fCD factor can be augmented to values over 100 by making use of lattice resonances in periodic arrangements of high index silicon nanoparticles. Our results, one order of magnitude above previously published results, could pave the way to a practical realization of field-enhanced chiral spectroscopic devices.
DescriptionResumen del trabajo presentado a la Spanish Conference on Nanophotonics (Conferencia Española de Nanofotónica-CEN), celebrada en Donostia-San Sebastián (España) del 3 al 5 de octubre de 2018.
URIhttp://hdl.handle.net/10261/179725
Appears in Collections:(CFM) Comunicaciones congresos
(CFMAC-IEM) Comunicaciones congresos
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