We demonstrate the control of enhanced chiral field distribution at the surface of hybrid metallo-dielectric nanostructures composed of self-assembled vertical hexagonal GaAs-based nanowires having three of the six sidewalls covered with Au. We show that weakly-guided modes of vertical GaAs nanowires can generate regions of high optical chirality that are further enhanced by the break of the symmetry introduced by the gold layer. Changing the angle of incidence of a linearly polarized plane wave it is possible to tailor and optimize the maps of the optical chirality in proximity of the gold plated walls. The low cost feasibility of the sample combined to the simple control by using linearly polarized light and the easy positioning of chiral molecules by functionalization of the gold plates make our proposed scheme very promising for enhanced enantioselective spectroscopy applications.

Chiral near-field manipulation in Au-GaAs hybrid hexagonal nanowires / Petronijevic, Emilija; Centini, Marco; Belardini, Alessandro; Leahu, Grigore; Hakkarainen, Teemu; Sibilia, Concetta. - In: OPTICS EXPRESS. - ISSN 1094-4087. - ELETTRONICO. - 25:13(2017), pp. 14148-14157. [10.1364/OE.25.014148]

Chiral near-field manipulation in Au-GaAs hybrid hexagonal nanowires

PETRONIJEVIC, EMILIJA;CENTINI, MARCO;BELARDINI, ALESSANDRO;LEAHU, GRIGORE;SIBILIA, Concetta
2017

Abstract

We demonstrate the control of enhanced chiral field distribution at the surface of hybrid metallo-dielectric nanostructures composed of self-assembled vertical hexagonal GaAs-based nanowires having three of the six sidewalls covered with Au. We show that weakly-guided modes of vertical GaAs nanowires can generate regions of high optical chirality that are further enhanced by the break of the symmetry introduced by the gold layer. Changing the angle of incidence of a linearly polarized plane wave it is possible to tailor and optimize the maps of the optical chirality in proximity of the gold plated walls. The low cost feasibility of the sample combined to the simple control by using linearly polarized light and the easy positioning of chiral molecules by functionalization of the gold plates make our proposed scheme very promising for enhanced enantioselective spectroscopy applications.
Chirality, Gallium arsenide, Gold, Gold plating Nanowires, Polarization, Semiconducting gallium
01 Pubblicazione su rivista::01a Articolo in rivista
Chiral near-field manipulation in Au-GaAs hybrid hexagonal nanowires / Petronijevic, Emilija; Centini, Marco; Belardini, Alessandro; Leahu, Grigore; Hakkarainen, Teemu; Sibilia, Concetta. - In: OPTICS EXPRESS. - ISSN 1094-4087. - ELETTRONICO. - 25:13(2017), pp. 14148-14157. [10.1364/OE.25.014148]
File allegati a questo prodotto
File Dimensione Formato  
OE-2017-GaAs-NWs-gold-25-13-14148.pdf

accesso aperto

Note: articolo principale
Tipologia: Documento in Post-print (versione successiva alla peer review e accettata per la pubblicazione)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 3.87 MB
Formato Adobe PDF
3.87 MB Adobe PDF Visualizza/Apri PDF

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/985598
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 22
  • ???jsp.display-item.citation.isi??? 21
social impact