Abstract

Fabrication and characterization of chiral metallic nanospirals for application as metamaterials in the visible and near infrared range are described. The structures consist of platinum helicoidal three-dimensional nanostructures realized by focused ion beam induced-deposition, where the interaction with incident light can be controlled as a function of light circular polarization state and spectral region, showing a circular dichroism across a wide range of optical wavelengths. An accurate size control and nanometer resolution on the fabrication of the chiral structures are achieved by exploring substrate surface charge effects on substrates with different electrical properties and by studying and implementing an accurate scanning procedure for the nanostructure growth that allows compensation of the proximity and charge effects. Optical measurements carried out on the nanospiral arrays using a high spatial resolution setup show a transmittance difference of the right- and left-circular polarized light near to 40%.

Autore Pugliese

• Passaseo Adriana Grazia , Sanvitto Daniele , Tasco Vittorianna

Tutti gli autori

• Esposito M.; Tasco V. ; Todisco F.; Benedetti A.; Sanvitto D.; Passaseo A.

Titolo volume/Rivista

Advanced optical materials

Anno di pubblicazione

2014

ISSN

2195-1071

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

Ultimo Aggiornamento Citazioni

Non Disponibile

Numero di citazioni Scopus

Non Disponibile

Ultimo Aggiornamento Citazioni

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Settori ERC

Non Disponibile

Codici ASJC

Non Disponibile