Tuning the plasmonic response with an external magnetic field is extremely promising to achieve active magnetoplasmonic devices, such as next generation refractometric sensors or tunable optical components. Noble metal nanostructures represent an ideal platform for studying and modeling magnetoplasmonic effects through the interaction of free electrons with external magnetic fields, even though their response is relatively low at the magnetic field intensities commonly applied in standard magneto-optical spectroscopies. Here we demonstrate a large magnetoplasmonic response of silver nanoparticles by performing magnetic circular dichroism spectroscopy at high magnetic fields, revealing a linear response to the magnetic field up to 30 T. The exploitation of such high fields allowed us to probe directly the field-induced splitting of circular plasmonic modes by performing absorption spectra with static circular polarizations, giving direct experimental evidence that the magneto-optical activity of plasmonic nanoparticles arises from the energy shift of field-split circular magnetoplasmonic modes.

High Magnetic Field Magneto-optics on Plasmonic Silica-Embedded Silver Nanoparticles / Gabbani A.; Campo G.; Bonanni V.; Van Rhee P.; Bottaro G.; De Julian Fernandez C.; Bello V.; Fantechi E.; Biccari F.; Gurioli M.; Armelao L.; Sangregorio C.; Mattei G.; Christianen P.; Pineider F.. - In: JOURNAL OF PHYSICAL CHEMISTRY. C. - ISSN 1932-7447. - STAMPA. - 126:(2022), pp. 1939-1945. [10.1021/acs.jpcc.1c09900]

High Magnetic Field Magneto-optics on Plasmonic Silica-Embedded Silver Nanoparticles

Gabbani A.;Bonanni V.;Fantechi E.;Biccari F.;Gurioli M.;Sangregorio C.;
2022

Abstract

Tuning the plasmonic response with an external magnetic field is extremely promising to achieve active magnetoplasmonic devices, such as next generation refractometric sensors or tunable optical components. Noble metal nanostructures represent an ideal platform for studying and modeling magnetoplasmonic effects through the interaction of free electrons with external magnetic fields, even though their response is relatively low at the magnetic field intensities commonly applied in standard magneto-optical spectroscopies. Here we demonstrate a large magnetoplasmonic response of silver nanoparticles by performing magnetic circular dichroism spectroscopy at high magnetic fields, revealing a linear response to the magnetic field up to 30 T. The exploitation of such high fields allowed us to probe directly the field-induced splitting of circular plasmonic modes by performing absorption spectra with static circular polarizations, giving direct experimental evidence that the magneto-optical activity of plasmonic nanoparticles arises from the energy shift of field-split circular magnetoplasmonic modes.
2022
126
1939
1945
Gabbani A.; Campo G.; Bonanni V.; Van Rhee P.; Bottaro G.; De Julian Fernandez C.; Bello V.; Fantechi E.; Biccari F.; Gurioli M.; Armelao L.; Sangregorio C.; Mattei G.; Christianen P.; Pineider F.
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/1258676
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