The quest for efficient ways of modulating localized surface plasmon resonance is one of the frontiers in current research in plasmonics; the use of a magnetic field as a source of modulation is among the most promising candidates for active plasmonics. Here we report the observation of magnetoplasmonic modes on colloidal gold nanoparticles detected by means of magnetic circular dichroism (MCD) spectroscopy and provide a model that is able to rationalize and reproduce the experiment with unprecedented qualitative and quantitative accuracy. We believe that the steep slope observed at the plasmon resonance in the MCD spectrum can be very efficient in detecting changes in the refractive index of the surrounding medium, and we give a simple proof of principle of its possible implementation for magnetoplasmonic refractometric sensing.

Circular Magnetoplasmonic Modes in Gold Nanoparticles / Francesco Pineider;Giulio Campo;Valentina Bonanni;César de Julián Fernández;Giovanni Mattei;Andrea Caneschi;Dante Gatteschi;Claudio Sangregorio. - In: NANO LETTERS. - ISSN 1530-6984. - STAMPA. - 13:(2013), pp. 4785-4789. [10.1021/nl402394p]

Circular Magnetoplasmonic Modes in Gold Nanoparticles

PINEIDER, FRANCESCO;CAMPO, GIULIO;BONANNI, VALENTINA;CANESCHI, ANDREA;GATTESCHI, DANTE;SANGREGORIO, CLAUDIO
2013

Abstract

The quest for efficient ways of modulating localized surface plasmon resonance is one of the frontiers in current research in plasmonics; the use of a magnetic field as a source of modulation is among the most promising candidates for active plasmonics. Here we report the observation of magnetoplasmonic modes on colloidal gold nanoparticles detected by means of magnetic circular dichroism (MCD) spectroscopy and provide a model that is able to rationalize and reproduce the experiment with unprecedented qualitative and quantitative accuracy. We believe that the steep slope observed at the plasmon resonance in the MCD spectrum can be very efficient in detecting changes in the refractive index of the surrounding medium, and we give a simple proof of principle of its possible implementation for magnetoplasmonic refractometric sensing.
2013
13
4785
4789
Francesco Pineider;Giulio Campo;Valentina Bonanni;César de Julián Fernández;Giovanni Mattei;Andrea Caneschi;Dante Gatteschi;Claudio Sangregori...espandi
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/822969
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