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Título

Surface-enhanced circular dichroism spectroscopy on periodic dual nanostructures

AutorLasa-Alonso, Jon CSIC ORCID; Abujetas, Diego R. CSIC ORCID; Nodar, Álvaro CSIC ORCID; Dionne, Jennifer; Sáenz, J. J.; Molina-Terriza, Gabriel CSIC ORCID; Aizpurua, Javier CSIC ORCID ; García-Etxarri, Aitzol CSIC ORCID CVN
Palabras claveCircular dichroism
Chirality
Duality symmetry
Lattice resonances
High refractive index nanoparticles
Fecha de publicación31-oct-2020
EditorACS Publications
CitaciónACS Photonics 7: 2978-2986 (2020)
ResumenIncreasing the sensitivity of chiral spectroscopic techniques such as circular dichroism (CD) spectroscopy is a current aspiration in the research field of nanophotonics. Enhancing CD spectroscopy depends on two complementary requirements: the enhancement of the electromagnetic fields perceived by the molecules under study and the conservation of the helicity of those fields, guaranteed by duality symmetry. In this work, we introduce a systematic method to design nanostructured dual periodic photonic systems capable of enhancing molecular CD spectroscopy resonantly. As an illustration, we engineer a dual 1D silicon nanoparticle array and show that its collective optical modes can be efficiently employed to resonantly enhance by 2 orders of magnitude the local density of optical chirality and, thus, the CD signal obtained from a given molecular sample on its vicinity.
Descripción9 pags., 4 figs.
Versión del editorhttp://dx.doi.org/10.1021/acsphotonics.0c00611
URIhttp://hdl.handle.net/10261/231366
DOI10.1021/acsphotonics.0c00611
Identificadoresdoi: 10.1021/acsphotonics.0c00611
issn: 2330-4022
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